Re: non-blocking IO EAGAIN on write
In message roy-8a46b6.07250924072...@news.panix.com, Roy Smith wrote: Consider, for example, a write on a TCP connection. You are sitting in a select(), when the other side closes the connection. The select() should return, and the write should then immediately fail. Remember that select can return 3 different sets of file objects. I’ve yet to see a use for the third one. -- http://mail.python.org/mailman/listinfo/python-list
Re: Are those features still the same?
In message i2gujh$sl...@news.eternal-september.org, francogrex wrote: By the way Peter Norvig is not biased, he works for Google research and is a supporter of programming in any language, especially in Python. Bias doesn’t have to be a conscious thing. -- http://mail.python.org/mailman/listinfo/python-list
Re: python terminology on classes
Peng Yu a écrit : Hi I'm still kind of confused about the terminology on classes in python. Could you please let me know what the equivalent terms for the following C++ terms? C++ and Python having very different semantics and object models, there's not necessarily a straight one to one mapping. constructor Python uses a smalltalk-like 2 phases instanciation / initialisation scheme. First the proper construction (__new__) is called with the class object as first argument, and it must return an unintialised instance of the class. Then the initialiser (__init__) is called on this instance. Now one usually only implements the initialiser, as the default object.__new__ method does what you would expect, so you'll often see people qualifying __init__ as the constructor. destructor Python has no real destructor. You can implement a __del__ method that will _eventually_ be called before the instance gets garbage-collected, but you'd rather not rely on it. Also, implementing this method will prevent cycle detection. member function = method. Note that Python's methods are really thin wrappers around function objects that are attributes of the class object. You'll find more on this here: http://wiki.python.org/moin/FromFunctionToMethod member variable = Attribute virtual member function All Python's methods are virtual. function = function !-) Note that in Python, functions and classes are objects. I think that C++ function is equivalent to python function and C++ member function is equivalent to python method. But I couldn't locate where the original definitions of the corresponding python terms in the manual as these term appear many times. Could you please point me where to look for the definition of these python corresponding terms? You just cannot directly translate C++ into Python, and while there are similarities trying to write C++ in Python will not get you very far. -- http://mail.python.org/mailman/listinfo/python-list
Re: hasattr + __getattr__: I think this is Python bug
Ethan Furman a écrit : Bruno Desthuilliers wrote: Duncan Booth a écrit : (snip) Or you could create the default as a class attribute from the OP: I have a class (FuncDesigner oofun) that has no attribute size, but it is overloaded in __getattr__, so if someone invokes myObject.size, it is generated (as another oofun) and connected to myObject as attribute. so this solution won't obviously work in this case !-) Also and FWIW, I wouldn't advocate this solution if the default class attribute is of a mutable type. Well, it is Monday, so I may be missing something obvious, but what is the effective difference between these two solutions? Now it's Tuesday !-) Ok, let's see: Python 2.6.2 (release26-maint, Apr 19 2009, 01:56:41) [GCC 4.3.3] on linux2 Type help, copyright, credits or license for more information. class Foo(object): ... whatever = Foo() ... Traceback (most recent call last): File stdin, line 1, in module File stdin, line 2, in Foo NameError: name 'Foo' is not defined -- http://mail.python.org/mailman/listinfo/python-list
Re: hasattr + __getattr__: I think this is Python bug
Bruno Desthuilliers a écrit : Ethan Furman a écrit : Bruno Desthuilliers wrote: Duncan Booth a écrit : (snip) Or you could create the default as a class attribute from the OP: I have a class (FuncDesigner oofun) that has no attribute size, but it is overloaded in __getattr__, so if someone invokes myObject.size, it is generated (as another oofun) and connected to myObject as attribute. so this solution won't obviously work in this case !-) Also and FWIW, I wouldn't advocate this solution if the default class attribute is of a mutable type. Well, it is Monday, so I may be missing something obvious, but what is the effective difference between these two solutions? If you meant what is the difference between creating the whatever attribute with a default value in the initializer and creating it on demand in the __getattr__ hook, the main difference is that in the first case, the instance is garanteed to have this attribute, so you get rid of hasattr checks (and the unwanted side effects) or, worse, direct check of the instance __dict__. Except for a couple of corner case, client code shouldn't have to worry about this kind of things - this breaks encapsulation. -- http://mail.python.org/mailman/listinfo/python-list
Re: Personal archive tool, looking for suggestions on improving the code
mo reina wrote:
i've written a tool in python where you enter a title, content, then
tags, and the entry is then saved in a pickle file. it was mainly
designed for copy-paste functionality (you spot a piece of code you
like on the net, copy it, and paste it into the program), not really
for handwritten content, though it does that with no problem.
i mainly did it because i'm always scanning through my pdf files,
books, or the net for some coding example of solution that i'd already
seen before, and it just seemed logical to have something where you
could just put the content in, give it a title and tags, and just look
it up whenever you needed to.
i realize there are sites online that handle this ex.
http://snippets.dzone.com, but i'm not always online when i code. i also
admit that i didn't really look to see if anyone had written a desktop
app, the project seemed like a fun thing to do so here i am.
it wasn't designed with millions of entries in mind, so i just use a
pickle file to serialize the data instead of one of the database APIs.
the query is also very basic, only title and tags and no ranking based
on the query.
there is an issue that i can't figure out, when you are at the list of
entries there's a try, except clause where it tries to catch a valid
index (integer). if you enter an inavlid integer, it will ask you to
enter a valid one, but it doesn't seem to be able to assign it to the
variable. if you enter a valid integer straightaway, there are no
problems and the entry will display.
anyway let me know what you guys think. this is coded for python3.
def choices(list_result):
'''takes a list of objects and returns the index of the selected
object'''
os.system('clear')
index = 0
for entry in list_result:
print('{}. {}'.format(index, entry.title))
index += 1
try:
choice = int(input('\nEnter choice: '))
return choice
except:
pause = input('\nplease enter a valid choice')
choices(list_result)
When the exception is triggered you call choices() recursively but discard
the result. Therefore you get Python's default, None, which is not a valid
index. Change the last line to
return choices(list_result)
for a minimal fix. However, I suggest that you use a while loop instead of
the recursion:
def choices(list_result):
while True:
os.system('clear')
for index, entry in enumerate(list_result):
print('{}. {}'.format(index, entry.title))
try:
choice = int(input('\nEnter choice: '))
if 0 = choice len(list_result):
return choice
except ValueError:
pass
input('\nplease enter a valid choice')
I've also added a test for the integer range and replaced the bare except
with a more specific one. I recommend that you never use bare excepts
because they can hide unexpected exceptions and lead to nasty bugs.
You should also remove the recursive call of main(). Its only effect is that
when you enter an invalid choice twice you will have to enter 5 twice to
really exit your script.
Peter
--
http://mail.python.org/mailman/listinfo/python-list
Re: Checking that 2 pdf are identical (md5 a solution?)
rlevesque wrote: On Jul 24, 1:34 pm, Peter Otten __pete...@web.de wrote: rlevesque wrote: Unfortunately there is an other pair of values that does not match and it is not obvious to me how to exclude it (as is done with the / CreationDate pair). and the pdf document is created using reportLab. I dug into the reportlab source and in reportlab/rl_config.py found the line invariant= 0 #produces repeatable,identical PDFs with same timestamp info (for regression testing) I suggest that you edit that file or add from reportlab import rl_config rl_config.invariant = True to your code. Peter WOW!! You are good! Your suggested solution works perfectly. Given your expertise I will not be able to 'repay' you by helping on Python problems but if you ever need help with SPSS related problems I will be pleased to provide the assistance you need. (I am the author of SPSS Programming and Data Management published by SPSS Inc. (an IBM company)) Relax! Assistance on c.l.py is free as in beer ;) If you feel you have to give something back pick a question you can answer, doesn't matter who's asking. Given that I can't answer the majority of questions posted here chances are that I learn something from your response, too. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Sorting a list created from a parsed xml message
On Jul 22, 12:56 pm, Thomas Jollans tho...@jollans.com wrote: On 07/21/2010 03:38 PM, kak...@gmail.com wrote: On Jul 21, 9:04 am, kak...@gmail.com kak...@gmail.com wrote: On Jul 21, 8:58 am, Stefan Behnel stefan...@behnel.de wrote: kak...@gmail.com, 21.07.2010 14:36: From the subject of my message it's clear that i get an xml message from a socket, Not at all, but now that you say it... i parse it and the result is a list like the one that follows: ID_Col 4 Server ak ip OFFLINE 29 Server and2 ip OFFLINE 5 Proxy l34e ip OFFLINE 6 Proxy barc ip ONLINE 41 Proxy proxy-2 ip ONLINE 53 Server server-4 ip ONLINE 52 Server server-3 ip ONLINE Doesn't look like a Python list to me... What i want is to print this list sorted by ID_Col? Any Suggestions? Assuming that the above is supposed to represent a list of tuples, you can use the .sort() method on the list and pass operator.itemgetter(0) as 'key' argument (see the sort() method and the operator module). Stefan No it is not a Python list at all. This the way i print the parsed items 'like a list'. But i want them to be sorted. Well i did this: SortedServers = [] for session in sessions: for IP in session.getElementsByTagName(ipAddress): for iphn in session.getElementsByTagName(hostName): tempTuple = session.getAttribute(id), session.getAttribute(type), iphn.childNodes[0].data, IP.childNodes[0].data, session.getAttribute(status) Please try to persuade your mail client to not mess up python code, if you could. It would make this *so* much easier to read SortedServers.append(tempTuple) Sorted = sorted(SortedServers, key=lambda id: SortedServers[0]) Anyway, let's look at that key function of yours: key=lambda id: SortedServers[0] translated to traditional function syntax: def key(id): return SortedServers[0] No matter which item sorted() examines, the key it sorts by is always the same (the first item of the WHOLE LIST). You want something more like this: def key(row): return row[0] ergo, what you want, all in all, is either of these: Sorted = sorted(SortedServers, key=(lambda row: row[0])) # option 1 SortedServers.sort(key=(lambda row: row[0])) # option 2 option 2, the in-place sort, might be faster. (and, as Stefan noted, as you probably want a numeric sort, you'll want your key to be an int) for item in Sorted: print item but the list is still unsorted and with u' in front of each item (u'4', u'Server', u'aika74', u'ip', u'OFFLINE') (u'29', u'Server', u'ando', u'ip2', u'OFFLINE') How do i remove the u' Antonis Thank you so much for your detailed response! Antonis K. -- http://mail.python.org/mailman/listinfo/python-list
parsing different xml messages
Hello, I receive the following different Xml Messages from a socket: p_control_message serverIP=server-2 xmlns=http://test.com/pt; cmdReply sessionList session id5a62ded/id subscriberId101/subscriberId subscriberNameAngie/subscriberName presenceonline/presence note/ ipAddressSome IP/ipAddress /session /sessionList /cmdReply /p_control_message p_control_message xmlns=http://test.com/pt; cmd systemMessage serverId=50 type=CRITICAL messageServer server-1 is going down for redeploy!/message /systemMessage /cmd /pttv_control_message Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Thanks Antonis K. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to capture all the environment variables from shell?
On Mon, 26 Jul 2010 21:42:24 -0500, Tim Chase wrote: Please! Never export anything from your .bashrc unless you really know what you're doing. Almost all exports should be done in your .bash_profile Could you elaborate on your reasoning why (or why-not)? I've found that my .bash_profile doesn't get evaluated when I crank up another terminal window, while my bashrc does. Thus I tend to put my exports in my ~/.bashrc so they actually take effect in my shell... Ideally, whichever program spawns the terminal window should have all of the environment settings from your ~/.profile (although you may have to explicitly source it from e.g. ~/.xsession), so it shouldn't be necessary to export them again. Using ~/.bashrc is a band-aid in case your desktop session doesn't already have your environment settings. But it only works for shells (and only for bash shells, and only for interactive bash shells), while your environment settings should be available to everything, regardless of whether it was spawned from an interactive bash shell or from some other program. Also, if you update environment variables with e.g.: export PATH=$PATH:/usr/local/bin any nested shells end up getting multiple updates. -- http://mail.python.org/mailman/listinfo/python-list
Re: Personal archive tool, looking for suggestions on improving the code
On 27 Lug, 10:23, Peter Otten __pete...@web.de wrote:
mo reina wrote:
i've written a tool in python where you enter a title, content, then
tags, and the entry is then saved in a pickle file. it was mainly
designed for copy-paste functionality (you spot a piece of code you
like on the net, copy it, and paste it into the program), not really
for handwritten content, though it does that with no problem.
i mainly did it because i'm always scanning through my pdf files,
books, or the net for some coding example of solution that i'd already
seen before, and it just seemed logical to have something where you
could just put the content in, give it a title and tags, and just look
it up whenever you needed to.
i realize there are sites online that handle this ex.
http://snippets.dzone.com, but i'm not always online when i code. i also
admit that i didn't really look to see if anyone had written a desktop
app, the project seemed like a fun thing to do so here i am.
it wasn't designed with millions of entries in mind, so i just use a
pickle file to serialize the data instead of one of the database APIs.
the query is also very basic, only title and tags and no ranking based
on the query.
there is an issue that i can't figure out, when you are at the list of
entries there's a try, except clause where it tries to catch a valid
index (integer). if you enter an inavlid integer, it will ask you to
enter a valid one, but it doesn't seem to be able to assign it to the
variable. if you enter a valid integer straightaway, there are no
problems and the entry will display.
anyway let me know what you guys think. this is coded for python3.
def choices(list_result):
'''takes a list of objects and returns the index of the selected
object'''
os.system('clear')
index = 0
for entry in list_result:
print('{}. {}'.format(index, entry.title))
index += 1
try:
choice = int(input('\nEnter choice: '))
return choice
except:
pause = input('\nplease enter a valid choice')
choices(list_result)
When the exception is triggered you call choices() recursively but discard
the result. Therefore you get Python's default, None, which is not a valid
index. Change the last line to
return choices(list_result)
for a minimal fix. However, I suggest that you use a while loop instead of
the recursion:
def choices(list_result):
while True:
os.system('clear')
for index, entry in enumerate(list_result):
print('{}. {}'.format(index, entry.title))
try:
choice = int(input('\nEnter choice: '))
if 0 = choice len(list_result):
return choice
except ValueError:
pass
input('\nplease enter a valid choice')
I've also added a test for the integer range and replaced the bare except
with a more specific one. I recommend that you never use bare excepts
because they can hide unexpected exceptions and lead to nasty bugs.
You should also remove the recursive call of main(). Its only effect is that
when you enter an invalid choice twice you will have to enter 5 twice to
really exit your script.
Peter
hi peter, i noticed the issue you mentioned but don't understand why
they happen.
for example, when the function is called in the case of an exception,
the variable choice is re-assigned to whatever the next input is, so
why is the default None assigned instead? and what' s the difference
between just calling the function again (the variable list_result
remains unchanged) and using a return statement?
i also don' t understand what happens when main is called recursively,
the variable choice should be re-assigned to whatever the next input
is, and yet it seems that in the first call, after an invalid choice,
it doesn't assign the input to the variable.
thanks for taking the time to post and review the code by the way, i
really appreciate it
--
http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Accumulate function in python
On Wed, Jul 21, 2010 at 8:17 AM, John Nagle na...@animats.com wrote: On 7/19/2010 9:56 AM, dhruvbird wrote: On Jul 19, 9:12 pm, Brian Victorhomeusen...@brianhv.org wrote: dhruvbird wrote: Having offered this, I don't recall ever seeing reduce used in real python code, and explicit iteration is almost always preferred. Yes, even I have noticed that reduce is a tad under-used function. Yes, I had a use case for it once, but it wasn't worth the trouble. map is often useful, but reduce, not so much. Python isn't really a functional language. There's no bias toward functional solutions, lambdas aren't very general, and the performance isn't any better. Nor is any concurrency provided by map or reduce. So there's no win in trying to develop cute one-liners. Too bad about the lack of concurrency, would be many places where that would be nice. Geremy Condra -- http://mail.python.org/mailman/listinfo/python-list
newb
hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. i have bought a book for $2 called learn to program using python by alan gauld. starting to read it but it was written in 2001. presuming that the commands and info would still be valid? any websites or books that are a must for beginners? any input would be much appreciated...cheers -- http://mail.python.org/mailman/listinfo/python-list
Re: Accumulate function in python
geremy condra, 27.07.2010 12:54: On Wed, Jul 21, 2010 at 8:17 AM, John Nagle wrote: On 7/19/2010 9:56 AM, dhruvbird wrote: On Jul 19, 9:12 pm, Brian Victor wrote: dhruvbird wrote: Having offered this, I don't recall ever seeing reduce used in real python code, and explicit iteration is almost always preferred. Yes, even I have noticed that reduce is a tad under-used function. Yes, I had a use case for it once, but it wasn't worth the trouble. map is often useful, but reduce, not so much. Python isn't really a functional language. There's no bias toward functional solutions, lambdas aren't very general, and the performance isn't any better. Nor is any concurrency provided by map or reduce. So there's no win in trying to develop cute one-liners. Too bad about the lack of concurrency, would be many places where that would be nice. Besides the many places where the current properties match just fine, there are some places where concurrency would be helpful. So I wouldn't call it lack of concurrency, as that seems to imply that it's a missing feature in what both builtins are targeted to provide. Just use one of the map-reduce frameworks that are out there if you need concurrency in one way or another. Special needs are not what builtins are there for. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: newb
On Jul 27, 9:07 pm, whitey m...@here.com wrote: hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. i have bought a book for $2 called learn to program using python by alan gauld. starting to read it but it was written in 2001. presuming that the commands and info would still be valid? any websites or books that are a must for beginners? any input would be much appreciated...cheers 2001 is rather old. Most of what you'll want is on the web. See http://wiki.python.org/moin/BeginnersGuide -- http://mail.python.org/mailman/listinfo/python-list
Re: python styles: why Use spaces around arithmetic operators?
In article mailman.1193.1280198148.1673.python-l...@python.org, Stephen Hansen me+list/pyt...@ixokai.io wrote: PEP8 is a style guide. Parts of style guides are rational judgements and decisions based on experience and can certainly be explained or justified, but parts are just... personal taste. Style is part rational thought and part intuition, and in the latter -- people will disagree quite a bit. There's no right or wrong there. There isn't always a rationale. I strongly suggest that ALL Python projects adopt PEP-8. Here's why. Style, at one level, doesn't really matter. Yet, it's something people get worked up over. If you add up all the time people have wasted arguing about stupid shit like indenting and where the braces go (in languages that have them) and how to spell variable names, we could have sent a man to Mars and had time left over to solve P = NP. I don't agree with PEP-8 100%, but it's perfectly reasonable. Avoiding all that time wasting arguing about trivia like variableName vs VariableName vs variable_name more than pays me back for any minor arguments I might have with the style. If everybody in the entire world uses the same style, then as people and code move around from project to project, everybody benefits by fitting in better. As the old-time press pythonistas would say, PEP-8 and be there. -- http://mail.python.org/mailman/listinfo/python-list
Re: Checking that 2 pdf are identical (md5 a solution?)
.. repeatable,identical PDFs with same timestamp info (for regression testing) I suggest that you edit that file or add from reportlab import rl_config rl_config.invariant = True to your code. Peter WOW!! You are good! Your suggested solution works perfectly. Given your expertise I will not be able to 'repay' you by helping on Python problems but if you ever need help with SPSS related problems I will be pleased to provide the assistance you need. (I am the author of SPSS Programming and Data Management published by SPSS Inc. (an IBM company)) Regards, .. if you have any more reportlab related queries you can also get free advice on the reportlab mailing list at http://two.pairlist.net/mailman/listinfo/reportlab-users -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
On Jul 27, 6:30 am, Stefan Behnel stefan...@behnel.de wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? Stefan From a tcp socket using the twisted framework. Application level protocol... Such as? -- http://mail.python.org/mailman/listinfo/python-list
Re: Personal archive tool, looking for suggestions on improving the code
mo reina wrote:
On 27 Lug, 10:23, Peter Otten __pete...@web.de wrote:
mo reina wrote:
i've written a tool in python where you enter a title, content, then
tags, and the entry is then saved in a pickle file. it was mainly
designed for copy-paste functionality (you spot a piece of code you
like on the net, copy it, and paste it into the program), not really
for handwritten content, though it does that with no problem.
i mainly did it because i'm always scanning through my pdf files,
books, or the net for some coding example of solution that i'd already
seen before, and it just seemed logical to have something where you
could just put the content in, give it a title and tags, and just look
it up whenever you needed to.
i realize there are sites online that handle this ex.
http://snippets.dzone.com, but i'm not always online when i code. i also
admit that i didn't really look to see if anyone had written a desktop
app, the project seemed like a fun thing to do so here i am.
it wasn't designed with millions of entries in mind, so i just use a
pickle file to serialize the data instead of one of the database APIs.
the query is also very basic, only title and tags and no ranking based
on the query.
there is an issue that i can't figure out, when you are at the list of
entries there's a try, except clause where it tries to catch a valid
index (integer). if you enter an inavlid integer, it will ask you to
enter a valid one, but it doesn't seem to be able to assign it to the
variable. if you enter a valid integer straightaway, there are no
problems and the entry will display.
anyway let me know what you guys think. this is coded for python3.
def choices(list_result):
'''takes a list of objects and returns the index of the selected
object'''
os.system('clear')
index = 0
for entry in list_result:
print('{}. {}'.format(index, entry.title))
index += 1
try:
choice = int(input('\nEnter choice: '))
return choice
except:
pause = input('\nplease enter a valid choice')
choices(list_result)
When the exception is triggered you call choices() recursively but
discard the result. Therefore you get Python's default, None, which is
not a valid index. Change the last line to
return choices(list_result)
for a minimal fix. However, I suggest that you use a while loop instead
of the recursion:
def choices(list_result):
while True:
os.system('clear')
for index, entry in enumerate(list_result):
print('{}. {}'.format(index, entry.title))
try:
choice = int(input('\nEnter choice: '))
if 0 = choice len(list_result):
return choice
except ValueError:
pass
input('\nplease enter a valid choice')
I've also added a test for the integer range and replaced the bare except
with a more specific one. I recommend that you never use bare excepts
because they can hide unexpected exceptions and lead to nasty bugs.
You should also remove the recursive call of main(). Its only effect is
that when you enter an invalid choice twice you will have to enter 5
twice to really exit your script.
Peter
hi peter, i noticed the issue you mentioned but don't understand why
they happen.
for example, when the function is called in the case of an exception,
the variable choice is re-assigned to whatever the next input is, so
why is the default None assigned instead? and what' s the difference
between just calling the function again (the variable list_result
remains unchanged) and using a return statement?
If you have a function
def f():
return 42
and just call it from another function
def g():
f()
the result of f() is evaluated but immediately discarded. If you want to use
it inside g() you have to assign it to a variable
def g():
x = f()
y = x * x
print y
and if you want to use it outside g() you can return it.
def g():
return f()
For recursion the same rules apply, only with the same function as f and g.
Here's a simple example for you to work out the program flow:
def r1(n):
... print entering level, n
... if n == 5:
... print limit reached
... print exiting level, n
... print returning 42
... return 42
... else:
... print recursing
... r1(n+1)
... print exiting level, n
... print (implicitly) returning None
...
r1(0)
entering level 0
recursing
entering level 1
recursing
entering level 2
recursing
entering level 3
recursing
entering level 4
recursing
entering level 5
limit reached
exiting level 5
returning 42
exiting level 4
(implicitly) returning None
exiting level 3
(implicitly) returning None
exiting level 2
(implicitly) returning None
exiting level 1
(implicitly) returning None
exiting level 0
(implicitly) returning None
Try to change r1() to return the value from the innermost call (i. e. 42) to
the outside world. Once you have understood what is going on you should be
able to see what's wrong with your
Re: parsing different xml messages
kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? Stefan From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
On Jul 27, 8:14 am, Stefan Behnel stefan...@behnel.de wrote: kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? Stefan From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Stefan Well yes you are right! I can't control the sending side. The app i'm writing just accepts incoming xml messages. Like the ones above. When i receive a message I parse it and print the information. I know how to parse both xml messages. What i want is to distinguish them so that i can trigger the appropriate parsing method. A.K. -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
kak...@gmail.com, 27.07.2010 14:26: On Jul 27, 8:14 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Well yes you are right! I can't control the sending side. The app i'm writing just accepts incoming xml messages. Like the ones above. When i receive a message I parse it and print the information. I know how to parse both xml messages. What i want is to distinguish them so that i can trigger the appropriate parsing method. Do they come in concatenated or one per connection? Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
On Jul 27, 8:41 am, Stefan Behnel stefan...@behnel.de wrote: kak...@gmail.com, 27.07.2010 14:26: On Jul 27, 8:14 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Well yes you are right! I can't control the sending side. The app i'm writing just accepts incoming xml messages. Like the ones above. When i receive a message I parse it and print the information. I know how to parse both xml messages. What i want is to distinguish them so that i can trigger the appropriate parsing method. Do they come in concatenated or one per connection? Stefan one per connection. -- http://mail.python.org/mailman/listinfo/python-list
Why is there no platform independent way of clearing a terminal?
Hi folks, If I'm only interested in linux and windows I know I can do import os import platform if platform.system( ) == 'Linux': clear = 'clear' else: clear = 'cls' os.system( clear ) or something equivalent using os.name and friends, but was wondering why there is no platform independent way (i.e. the platform dependence is taken care of by the python stdlib) of clearing a terminal. Sure, there are many different terminals and many different operating systems but in many areas python managed to hide all these complexities behind a well defined API. Why was clearing a terminal left out? Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
kak...@gmail.com, 27.07.2010 14:43: On Jul 27, 8:41 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 14:26: On Jul 27, 8:14 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Well yes you are right! I can't control the sending side. The app i'm writing just accepts incoming xml messages. Like the ones above. When i receive a message I parse it and print the information. I know how to parse both xml messages. What i want is to distinguish them so that i can trigger the appropriate parsing method. Do they come in concatenated or one per connection? Stefan one per connection. Ah, ok, then just parse the message using (c)ElementTree and look at the name of the first child below the root node (assuming that both messages were supposed to have the same root node, as you may have wanted to indicate in your original posting). A dict dispatch to a function or method will do just fine. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing different xml messages
On Jul 27, 9:06 am, Stefan Behnel stefan...@behnel.de wrote: kak...@gmail.com, 27.07.2010 14:43: On Jul 27, 8:41 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 14:26: On Jul 27, 8:14 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 13:58: On Jul 27, 6:30 am, Stefan Behnel wrote: kak...@gmail.com, 27.07.2010 12:17: I receive the following different Xml Messages from a socket: From a bare socket? TCP? UDP? Or what else? Which is the best way to make a distinction between them so that every time my app receives the one or the other, parse them correctly? Use an application level protocol? From a tcp socket using the twisted framework. Application level protocol... Such as? Depends on what you *can* use. Do you control the sending side? Note: giving better details helps others in giving better answers. Well yes you are right! I can't control the sending side. The app i'm writing just accepts incoming xml messages. Like the ones above. When i receive a message I parse it and print the information. I know how to parse both xml messages. What i want is to distinguish them so that i can trigger the appropriate parsing method. Do they come in concatenated or one per connection? Stefan one per connection. Ah, ok, then just parse the message using (c)ElementTree and look at the name of the first child below the root node (assuming that both messages were supposed to have the same root node, as you may have wanted to indicate in your original posting). A dict dispatch to a function or method will do just fine. Stefan ok that's great, thanks Stefan i'll try it. Antonis -- http://mail.python.org/mailman/listinfo/python-list
Re: newb
whitey wrote: hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. i have bought a book for $2 called learn to program using python by alan gauld. starting to read it but it was written in 2001. presuming that the commands and info would still be valid? any websites or books that are a must for beginners? any input would be much appreciated...cheers Welcome to the forum, Newsgroup: Send Tutor mailing list submissions to tu...@python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/tutor or, via email, send a message with subject or body 'help' to tutor-requ...@python.org For an updated Alan Gauld tutorial: the Learn to Program web site http://www.alan-g.me.uk/ The python.org website is a wealth of information, and also contains links to many other python-oriented sites. Before installing python, consider whether you want version 2.x or 3.x. The language changed a bit at 3.x, and while you're learning, you want a tutorial that matches the version you're running. Easiest way to recognize a particular script as being one or the other is if it has a print statement. print is a statement in version 1.x and 2.x, and is a function in version 3. Any recent tutorial will tell you which it's targeting, but since version 3 is only a year or so old, older tutorials or sample code might well not mention it. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Accumulate function in python
On 19 Jul, 13:18, dhruvbird dhruvb...@gmail.com wrote: Hello, I have a list of integers: x = [ 0, 1, 2, 1, 1, 0, 0, 2, 3 ] And would like to compute the cumulative sum of all the integers from index zero into another array. So for the array above, I should get: [ 0, 1, 3, 4, 5, 5, 5, 7, 10 ] What is the best way (or pythonic way) to get this. At least for large arrays, this is the kind of task where NumPy will help. import numpy as np np.cumsum([ 0, 1, 2, 1, 1, 0, 0, 2, 3 ]) array([ 0, 1, 3, 4, 5, 5, 5, 7, 10]) -- http://mail.python.org/mailman/listinfo/python-list
string manipulation.
I am trying to read an xml using minidom from python library xml.dom
This is the xml file:
-
rm_structure
resources
resource
AB
Capacity100/Capacity
NumberVirtualClasses
2
/NumberVirtualClasses
/resource
/resources
/rm_structure
--
This is the python code:
from xml.dom import minidom
doc= minidom.parse(example.xml)
resources_section = doc.getElementsByTagName('resources')
list_resources = resources_section[0].getElementsByTagName('resource')
for r in list_resources:
name = r.childNodes[0].nodeValue
print name
print len(name)
-
The problem is that the nodeValue stored in the variable 'name' is not AB
(what i want) but instead it is a string that has length of 8 and it seems
it include the tabs and/or other things.
How can i get the string AB without the other stuff?
Thanks.
--
View this message in context:
http://old.nabble.com/string-manipulation.-tp29276755p29276755.html
Sent from the Python - python-list mailing list archive at Nabble.com.
--
http://mail.python.org/mailman/listinfo/python-list
Urrlib2 IncompleteRead error
I am running urllib2.request and get this response when I do the read.
Any ideas what causes this?
return response.read()
File C:\Python26\lib\socket.py, line 329, in read
data = self._sock.recv(rbufsize)
File C:\Python26\lib\httplib.py, line 518, in read
return self._read_chunked(amt)
File C:\Python26\lib\httplib.py, line 561, in _read_chunked
raise IncompleteRead(''.join(value))
IncompleteRead: IncompleteRead(3235 bytes read)
Dirk
--
http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
Daniel Fetchinson a écrit : Hi folks, If I'm only interested in linux and windows I know I can do import os import platform if platform.system( ) == 'Linux': clear = 'clear' else: clear = 'cls' os.system( clear ) or something equivalent using os.name and friends, but was wondering why there is no platform independent way (i.e. the platform dependence is taken care of by the python stdlib) of clearing a terminal. Sure, there are many different terminals and many different operating systems but in many areas python managed to hide all these complexities behind a well defined API. Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). And the shell is not necessarily part of the OS itself (there's no shortage of shells for unices / linux systems), so it doesn't belong to the os or platform modules. FWIW, I can't tell for sure since I never used any other shell than bash, but I'm not sure your above code is garanteed to work on each and any possible unix shell. -- http://mail.python.org/mailman/listinfo/python-list
Check in interpreter if running a debug version of python
Can I check in the interpreter if I am running a debug version of python? I don't mean if __debug__ is set, I want to know if python was compiled in debug mode. Thanks, John. -- http://mail.python.org/mailman/listinfo/python-list
Re: string manipulation.
On 2010-07-27, gerardob gberbeg...@gmail.com wrote:
I am trying to read an xml using minidom from python library xml.dom
This is the xml file:
-
rm_structure
resources
resource
AB
Capacity100/Capacity
NumberVirtualClasses
2
/NumberVirtualClasses
/resource
/resources
/rm_structure
--
This is the python code:
from xml.dom import minidom
doc= minidom.parse(example.xml)
resources_section = doc.getElementsByTagName('resources')
list_resources = resources_section[0].getElementsByTagName('resource')
for r in list_resources:
name = r.childNodes[0].nodeValue
print name
print len(name)
-
The problem is that the nodeValue stored in the variable 'name' is not AB
(what i want) but instead it is a string that has length of 8 and it seems
it include the tabs and/or other things.
How can i get the string AB without the other stuff?
Check out the strip member function.
name = r.childNodes[0].nodeValue.strip()
--
Neil Cerutti
--
http://mail.python.org/mailman/listinfo/python-list
Re: Check in interpreter if running a debug version of python
Can I check in the interpreter if I am running a debug version of python? I don't mean if __debug__ is set, I want to know if python was compiled in debug mode. Python has multiple flavors of debug builds. hasattr(sys, gettotalrefcount) is only available if Py_REF_DEBUG is enabled. This should be sufficient to detect the most used debug variant. Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: string manipulation.
gerardob gberbeg...@gmail.com wrote in message
news:29276755.p...@talk.nabble.com...
I am trying to read an xml using minidom from python library xml.dom
This is the xml file:
-
rm_structure
resources
resource
AB
Capacity100/Capacity
NumberVirtualClasses
2
/NumberVirtualClasses
/resource
/resources
/rm_structure
--
This is the python code:
from xml.dom import minidom
doc= minidom.parse(example.xml)
resources_section = doc.getElementsByTagName('resources')
list_resources = resources_section[0].getElementsByTagName('resource')
for r in list_resources:
name = r.childNodes[0].nodeValue
print name
print len(name)
-
The problem is that the nodeValue stored in the variable 'name' is not
AB
(what i want) but instead it is a string that has length of 8 and it seems
it include the tabs and/or other things.
How can i get the string AB without the other stuff?
Thanks.
Whitespace in XML is significant. If the file was:
rm_structure
resources
resourceABCapacity100/Capacity
NumberVirtualClasses2/NumberVirtualClasses
/resource
/resources
/rm_structure
You would just read 'AB'. If you don't control the XML file, then:
print name.strip()
will remove leading and trailing whitespace.
-Mark
--
http://mail.python.org/mailman/listinfo/python-list
Best practice way to open files in Python 2.6+?
What is the best practice way to open files in Python 2.6+ It looks like there are at least 3 different ways to open files: - built-in open() - io.open() - codecs.open() It seems like io.open() combines the best of the built-in open() and the codecs open(). Am I missing any obvious drawbacks to using io.open() except for backwards compatibility? Thank you, Malcolm -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On 2010-07-27, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Daniel Fetchinson a ?crit : Hi folks, If I'm only interested in linux and windows I know I can do import os import platform if platform.system( ) == 'Linux': clear = 'clear' else: clear = 'cls' os.system( clear ) or something equivalent using os.name and friends, but was wondering why there is no platform independent way (i.e. the platform dependence is taken care of by the python stdlib) of clearing a terminal. Sure, there are many different terminals and many different operating systems but in many areas python managed to hide all these complexities behind a well defined API. Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). No, what he's talking about is clearing a terminal (or a terminal emulator). They both work the same, the only difference is whether the terminal software is running on dedicated hardware or on general-purpose hardware. And the shell is not necessarily part of the OS itself (there's no shortage of shells for unices / linux systems), so it doesn't belong to the os or platform modules. True, but clearing a terminal or terminal emulator has nothing to do with the shell. It's done using an in-band control/escape sequence that's indepedent of the shell being used. His example accomplishes this using an executable named 'clear' which knows how to use terminfo/termcap (I forget which one) to send the proper escape sequence to the terminal. FWIW, I can't tell for sure since I never used any other shell than bash, but I'm not sure your above code is garanteed to work on each and any possible unix shell. Again, the shell is irrelevent. -- Grant Edwards grant.b.edwardsYow! Zippy's brain cells at are straining to bridge gmail.comsynapses ... -- http://mail.python.org/mailman/listinfo/python-list
Windows: How to detect whether a Python app/script is running in console/GUI mode?
Windows: How can I detect whether a Python app/script is running in console/GUI mode? By app I mean a script compiled to an exe via py2exe or similar. Thank you, Malcolm -- http://mail.python.org/mailman/listinfo/python-list
Re: Check in interpreter if running a debug version of python
On Tue, Jul 27, 2010 at 09:06, John Reid j.r...@mail.cryst.bbk.ac.ukwrote: Can I check in the interpreter if I am running a debug version of python? I don't mean if __debug__ is set, I want to know if python was compiled in debug mode. Thanks, John. Starting with Python 2.7 and 3.2 you can do this: sysconfig.get_config_var(Py_DEBUG) 1 (returns None if the var doesn't exist) -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
Grant Edwards a écrit : On 2010-07-27, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Daniel Fetchinson a ?crit : (snip) Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). No, what he's talking about is clearing a terminal (or a terminal emulator). They both work the same, the only difference is whether the terminal software is running on dedicated hardware or on general-purpose hardware. (snip) I stand corrected. -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On Tue, 27 Jul 2010 16:02:23 +0200, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Daniel Fetchinson a écrit : Hi folks, If I'm only interested in linux and windows I know I can do import os import platform if platform.system( ) == 'Linux': clear = 'clear' else: clear = 'cls' os.system( clear ) or something equivalent using os.name and friends, but was wondering why there is no platform independent way (i.e. the platform dependence is taken care of by the python stdlib) of clearing a terminal. Sure, there are many different terminals and many different operating systems but in many areas python managed to hide all these complexities behind a well defined API. Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). And the shell is not necessarily part of the OS itself (there's no shortage of shells for unices / linux systems), so it doesn't belong to the os or platform modules. FWIW, I can't tell for sure since I never used any other shell than bash, but I'm not sure your above code is garanteed to work on each and any possible unix shell. Sorry, but that is completely wrong - the shell is irrelevant. clear is just a normal command line program that queries the termcap/terminfo database (possibly via the curses library) for the terminal specific sequence of characters that will clear the screen. It then writes those characters to stdout. The terminal, or (more usually these days) terminal emulator, then interprets those characters and takes the appropriate action. I'm not sure what the POSIX status of the clear command is, but I'd be surprised if it wasn't present on a UNIX/Linux system of any vintage. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Personal archive tool, looking for suggestions on improving the code
On Jul 27, 2:06 pm, Peter Otten __pete...@web.de wrote:
mo reina wrote:
On 27 Lug, 10:23, Peter Otten __pete...@web.de wrote:
mo reina wrote:
i've written a tool in python where you enter a title, content, then
tags, and the entry is then saved in a pickle file. it was mainly
designed for copy-paste functionality (you spot a piece of code you
like on the net, copy it, and paste it into the program), not really
for handwritten content, though it does that with no problem.
i mainly did it because i'm always scanning through my pdf files,
books, or the net for some coding example of solution that i'd already
seen before, and it just seemed logical to have something where you
could just put the content in, give it a title and tags, and just look
it up whenever you needed to.
i realize there are sites online that handle this ex.
http://snippets.dzone.com, but i'm not always online when i code. i also
admit that i didn't really look to see if anyone had written a desktop
app, the project seemed like a fun thing to do so here i am.
it wasn't designed with millions of entries in mind, so i just use a
pickle file to serialize the data instead of one of the database APIs.
the query is also very basic, only title and tags and no ranking based
on the query.
there is an issue that i can't figure out, when you are at the list of
entries there's a try, except clause where it tries to catch a valid
index (integer). if you enter an inavlid integer, it will ask you to
enter a valid one, but it doesn't seem to be able to assign it to the
variable. if you enter a valid integer straightaway, there are no
problems and the entry will display.
anyway let me know what you guys think. this is coded for python3.
def choices(list_result):
'''takes a list of objects and returns the index of the selected
object'''
os.system('clear')
index = 0
for entry in list_result:
print('{}. {}'.format(index, entry.title))
index += 1
try:
choice = int(input('\nEnter choice: '))
return choice
except:
pause = input('\nplease enter a valid choice')
choices(list_result)
When the exception is triggered you call choices() recursively but
discard the result. Therefore you get Python's default, None, which is
not a valid index. Change the last line to
return choices(list_result)
for a minimal fix. However, I suggest that you use a while loop instead
of the recursion:
def choices(list_result):
while True:
os.system('clear')
for index, entry in enumerate(list_result):
print('{}. {}'.format(index, entry.title))
try:
choice = int(input('\nEnter choice: '))
if 0 = choice len(list_result):
return choice
except ValueError:
pass
input('\nplease enter a valid choice')
I've also added a test for the integer range and replaced the bare except
with a more specific one. I recommend that you never use bare excepts
because they can hide unexpected exceptions and lead to nasty bugs.
You should also remove the recursive call of main(). Its only effect is
that when you enter an invalid choice twice you will have to enter 5
twice to really exit your script.
Peter
hi peter, i noticed the issue you mentioned but don't understand why
they happen.
for example, when the function is called in the case of an exception,
the variable choice is re-assigned to whatever the next input is, so
why is the default None assigned instead? and what' s the difference
between just calling the function again (the variable list_result
remains unchanged) and using a return statement?
If you have a function
def f():
return 42
and just call it from another function
def g():
f()
the result of f() is evaluated but immediately discarded. If you want to use
it inside g() you have to assign it to a variable
def g():
x = f()
y = x * x
print y
and if you want to use it outside g() you can return it.
def g():
return f()
For recursion the same rules apply, only with the same function as f and g.
Here's a simple example for you to work out the program flow:
def r1(n):
... print entering level, n
... if n == 5:
... print limit reached
... print exiting level, n
... print returning 42
... return 42
... else:
... print recursing
... r1(n+1)
... print exiting level, n
... print (implicitly) returning None
... r1(0)
entering level 0
recursing
entering level 1
recursing
entering level 2
recursing
entering level 3
recursing
entering level 4
recursing
entering level 5
limit reached
exiting level 5
returning 42
exiting level 4
(implicitly) returning None
exiting level 3
(implicitly) returning None
exiting level 2
(implicitly) returning None
exiting level 1
(implicitly) returning None
exiting level 0
(implicitly) returning None
Try to change
Re: Best practice way to open files in Python 2.6+?
On Tue, Jul 27, 2010 at 09:33, pyt...@bdurham.com wrote: What is the best practice way to open files in Python 2.6+ It looks like there are at least 3 different ways to open files: - built-in open() - io.open() - codecs.open() It seems like io.open() combines the best of the built-in open() and the codecs open(). Am I missing any obvious drawbacks to using io.open() except for backwards compatibility? Thank you, Malcolm As an FYI, the builtin open() uses io.open() on at least 3.1 (maybe also 3.0, don't know). I don't know your use cases or what you get or don't get from any of those options, but the future is io.open. io.open is open True -- http://mail.python.org/mailman/listinfo/python-list
Re: Best practice way to open files in Python 2.6+?
On Tue, 27 Jul 2010 10:33:06 -0400 pyt...@bdurham.com wrote: What is the best practice way to open files in Python 2.6+ It looks like there are at least 3 different ways to open files: - built-in open() - io.open() - codecs.open() It seems like io.open() combines the best of the built-in open() and the codecs open(). Am I missing any obvious drawbacks to using io.open() except for backwards compatibility? io.open() is quite slow in 2.6, although the performance issues are fixed in 2.7 (and in 3.1). io.open() is much stricter in what types it accepts and emits. Files opened in text mode, for example, will return unicode strings when reading and will only accept unicode strings for write(). (similarly, files opened in binary mode will only accept bytestrings for write()) Regards Antoine. -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows: How to detect whether a Python app/script is running in console/GUI mode?
On Tue, Jul 27, 2010 at 09:36, pyt...@bdurham.com wrote: Windows: How can I detect whether a Python app/script is running in console/GUI mode? By app I mean a script compiled to an exe via py2exe or similar. Thank you, Malcolm I don't remember much about py2exe, but you could check if ``os.path.split(sys.executable)[1]`` equals pythonw.exe (typical for GUIs) or just python.exe (regular console). -- http://mail.python.org/mailman/listinfo/python-list
Re: Best practice way to open files in Python 2.6+?
Brian, As an FYI, the builtin open() uses io.open() on at least 3.1 (maybe also 3.0, don't know). I don't know your use cases or what you get or don't get from any of those options, but the future is io.open. io.open is open True Under Python 2.6.4 (Windows), io.open is open returns False. Retrieving help() on io.open and open() reinforces that these are 2 different implementations of open. My use case is reading and writing UTF-8 text files with universal newline support. I believe that the following io.open() parameter list is what I should be using: # mode set to 'rt' (read) or 'wt' (write) io.open( file, mode, encoding='utf-8', errors='ignore', newline=None ) Malcolm -- http://mail.python.org/mailman/listinfo/python-list
Re: Best practice way to open files in Python 2.6+?
On Tue, Jul 27, 2010 at 09:59, pyt...@bdurham.com wrote: Brian, Under Python 2.6.4 (Windows), io.open is open returns False. Retrieving help() on io.open and open() reinforces that these are 2 different implementations of open. My use case is reading and writing UTF-8 text files with universal newline support. I believe that the following io.open() parameter list is what I should be using: # mode set to 'rt' (read) or 'wt' (write) io.open( file, mode, encoding='utf-8', errors='ignore', newline=None ) Malcolm Precisely. I was just showing that in 3.x they are the same because one uses the other, and that reason might be enough for you to consider io.open. Your usage of io.open looks fine to me. If it works for you, keep doing it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Check in interpreter if running a debug version of python
Starting with Python 2.7 and 3.2 you can do this: sysconfig.get_config_var(Py_DEBUG) 1 (returns None if the var doesn't exist) IIRC sysconfig.get_config_var() still depends on parsing the pyconfig.h file. This won't work on Windows because we are using project and config settings of VisualStudio. -- http://mail.python.org/mailman/listinfo/python-list
multicpu bzip2 using os.system or queue using python script
I want to quickly bzip2 compress several hundred gigabytes of data using my 8 core , 16 GB ram workstation. Currently I am using a simple python script to compress a whole directory tree using bzip2 and a system call coupled to an os.walk call. I see that the bzip2 only uses a single cpu while the other cpus remain relatively idle. I am a newbie in queue and threaded processes . But I am wondering how I can implement this such that I can have four bzip2 running threads (actually I guess os.system threads ), each using probably their own cpu , that deplete files from a queue as they bzip them. Thanks for your suggestions in advance hari My single thread script is pasted here . import os import sys for roots, dirlist , filelist in os.walk(os.curdir): for file in [os.path.join(roots,filegot) for filegot in filelist]: if bz2 not in file: print Compressing %s % (file) os.system(bzip2 %s % file) print :DONE -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows: How to detect whether a Python app/script is running in console/GUI mode?
On 27/07/2010 15:58, Brian Curtin wrote: On Tue, Jul 27, 2010 at 09:36,pyt...@bdurham.com wrote: Windows: How can I detect whether a Python app/script is running in console/GUI mode? By app I mean a script compiled to an exe via py2exe or similar. Thank you, Malcolm I don't remember much about py2exe, but you could check if ``os.path.split(sys.executable)[1]`` equals pythonw.exe (typical for GUIs) or just python.exe (regular console). Don't know whether it's foolproof, but I suspect that checking whether win32console.GetConsoleWindow () returns zero is probably not a bad approach. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows: How to detect whether a Python app/script is running in console/GUI mode?
On 7/27/2010 7:36 AM pyt...@bdurham.com said... Windows: How can I detect whether a Python app/script is running in console/GUI mode? By app I mean a script compiled to an exe via py2exe or similar. Once you've got an exe, you'll need to know the name you're looking for. There are several utilities available -- I use pslist from sysinternals, but there are others out there like process explorer, WMIC or tasklist. You could translate the VB found at http://support.microsoft.com/kb/187913 and use win32. You could program a pid file into your exe and check that. One cheap trick is to create a file and keep it open while your process runs. From the outside, if the file is missing or you can erase the file, you're process isn't active. This relies on windows requiring exclusive access to delete a file which it does, and doesn't rely on the presence of a particular windows version or installation of a third party utility. HTH, Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: Personal archive tool, looking for suggestions on improving the code
mo reina urban.yoga.journ...@gmail.com writes: i mainly did it because i'm always scanning through my pdf files, books, or the net for some coding example of solution that i'd already seen before, and it just seemed logical to have something where you could just put the content in, give it a title and tags, and just look it up whenever you needed to. Ages ago I wrote something like this in Perl, but now I use a local install of MediaWiki to keep notes, interesting links, code snippets, etc. One of the advantages is that I can reach it from each computer connected to my LAN, even virtual ones. -- John Bokma j3b Hacking Hiking in Mexico - http://johnbokma.com/ http://castleamber.com/ - Perl Python Development -- http://mail.python.org/mailman/listinfo/python-list
Re: Urrlib2 IncompleteRead error
Hi,
Check if the webpage you are trying to access is redirecting the page to
some other page?
or the timeout is too less for the request to finish
Thanks,
Nitin
On Tue, Jul 27, 2010 at 7:30 PM, dirknbr dirk...@gmail.com wrote:
I am running urllib2.request and get this response when I do the read.
Any ideas what causes this?
return response.read()
File C:\Python26\lib\socket.py, line 329, in read
data = self._sock.recv(rbufsize)
File C:\Python26\lib\httplib.py, line 518, in read
return self._read_chunked(amt)
File C:\Python26\lib\httplib.py, line 561, in _read_chunked
raise IncompleteRead(''.join(value))
IncompleteRead: IncompleteRead(3235 bytes read)
Dirk
--
http://mail.python.org/mailman/listinfo/python-list
--
Nitin Pawar
--
http://mail.python.org/mailman/listinfo/python-list
Re: Urrlib2 IncompleteRead error
Thanks, I don't think it's redirecting, how can I increase the timeout?
On 27 July 2010 16:56, Nitin Pawar nitinpawar...@gmail.com wrote:
Hi,
Check if the webpage you are trying to access is redirecting the page to
some other page?
or the timeout is too less for the request to finish
Thanks,
Nitin
On Tue, Jul 27, 2010 at 7:30 PM, dirknbr dirk...@gmail.com wrote:
I am running urllib2.request and get this response when I do the read.
Any ideas what causes this?
return response.read()
File C:\Python26\lib\socket.py, line 329, in read
data = self._sock.recv(rbufsize)
File C:\Python26\lib\httplib.py, line 518, in read
return self._read_chunked(amt)
File C:\Python26\lib\httplib.py, line 561, in _read_chunked
raise IncompleteRead(''.join(value))
IncompleteRead: IncompleteRead(3235 bytes read)
Dirk
--
http://mail.python.org/mailman/listinfo/python-list
--
Nitin Pawar
--
http://twitter.com/dirknbr
http://maximum-likely.blogspot.com
--
http://mail.python.org/mailman/listinfo/python-list
Re: Urrlib2 IncompleteRead error
import socket
# timeout in seconds
timeout = 10
socket.setdefaulttimeout(timeout)
On Tue, Jul 27, 2010 at 10:09 PM, Dirk Nachbar dirk...@gmail.com wrote:
Thanks, I don't think it's redirecting, how can I increase the timeout?
On 27 July 2010 16:56, Nitin Pawar nitinpawar...@gmail.com wrote:
Hi,
Check if the webpage you are trying to access is redirecting the page to
some other page?
or the timeout is too less for the request to finish
Thanks,
Nitin
On Tue, Jul 27, 2010 at 7:30 PM, dirknbr dirk...@gmail.com wrote:
I am running urllib2.request and get this response when I do the read.
Any ideas what causes this?
return response.read()
File C:\Python26\lib\socket.py, line 329, in read
data = self._sock.recv(rbufsize)
File C:\Python26\lib\httplib.py, line 518, in read
return self._read_chunked(amt)
File C:\Python26\lib\httplib.py, line 561, in _read_chunked
raise IncompleteRead(''.join(value))
IncompleteRead: IncompleteRead(3235 bytes read)
Dirk
--
http://mail.python.org/mailman/listinfo/python-list
--
Nitin Pawar
--
http://twitter.com/dirknbr
http://maximum-likely.blogspot.com
--
Nitin Pawar
--
http://mail.python.org/mailman/listinfo/python-list
Re: Orange County, California Python User Group
Dan: I am an instructor at Cal State Fullerton, and we are looking for a few industry leaders that would be willing to server on an advisory board for a Python programming class series. If you have a minute to talk or know of someone who is interested, please give me a call. Thanks Tom Calhoon (714) 834-6632 -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
Hi folks, If I'm only interested in linux and windows I know I can do import os import platform if platform.system( ) == 'Linux': clear = 'clear' else: clear = 'cls' os.system( clear ) or something equivalent using os.name and friends, but was wondering why there is no platform independent way (i.e. the platform dependence is taken care of by the python stdlib) of clearing a terminal. Sure, there are many different terminals and many different operating systems but in many areas python managed to hide all these complexities behind a well defined API. Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). And the shell is not necessarily part of the OS itself (there's no shortage of shells for unices / linux systems), so it doesn't belong to the os or platform modules. FWIW, I can't tell for sure since I never used any other shell than bash, but I'm not sure your above code is garanteed to work on each and any possible unix shell. Sorry, but that is completely wrong - the shell is irrelevant. clear is just a normal command line program that queries the termcap/terminfo database (possibly via the curses library) for the terminal specific sequence of characters that will clear the screen. It then writes those characters to stdout. The terminal, or (more usually these days) terminal emulator, then interprets those characters and takes the appropriate action. I'm not sure what the POSIX status of the clear command is, but I'd be surprised if it wasn't present on a UNIX/Linux system of any vintage. After getting the technicalities out of the way, maybe I should have asked: Is it only me or others would find a platform independent python API to clear the terminal useful? Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On 7/27/2010 7:44 AM, Bruno Desthuilliers wrote: Grant Edwards a écrit : On 2010-07-27, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Daniel Fetchinson a ?crit : (snip) Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). No, what he's talking about is clearing a terminal (or a terminal emulator). They both work the same, the only difference is whether the terminal software is running on dedicated hardware or on general-purpose hardware. (snip) I stand corrected. I immediately thought of using the curses module, but that's UNIX-only, or at least it's not in the ActiveState Python distro. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: hasattr + __getattr__: I think this is Python bug
Bruno Desthuilliers wrote: Bruno Desthuilliers a écrit : Ethan Furman a écrit : Bruno Desthuilliers wrote: Duncan Booth a écrit : (snip) Or you could create the default as a class attribute from the OP: I have a class (FuncDesigner oofun) that has no attribute size, but it is overloaded in __getattr__, so if someone invokes myObject.size, it is generated (as another oofun) and connected to myObject as attribute. so this solution won't obviously work in this case !-) Also and FWIW, I wouldn't advocate this solution if the default class attribute is of a mutable type. Well, it is Monday, so I may be missing something obvious, but what is the effective difference between these two solutions? If you meant what is the difference between creating the whatever attribute with a default value in the initializer and creating it on demand in the __getattr__ hook, the main difference is that in the first case, the instance is garanteed to have this attribute, so you get rid of hasattr checks (and the unwanted side effects) or, worse, direct check of the instance __dict__. Except for a couple of corner case, client code shouldn't have to worry about this kind of things - this breaks encapsulation. Yay Tuesday! :D What I meant was what is the difference between: [Bruno Desthuilliers] DEFAULT_WHATEVER = Whathever() class MyClass(object): def __init__(self, x, y): self.size = DEFAULT_WHATEVER and [Duncan Booth] class MyClass(object): size = Whatever() def __init__(self, x, y): ... in both cases the object ends up with a size attribute and no further need of __getattr__. Of course, the warning about having a mutable object as a class attribute stands. To phrase it another way, why does your solution (Bruno) work, but Duncan's obviously won't? ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On 2010-07-27, Daniel Fetchinson fetchin...@googlemail.com wrote: After getting the technicalities out of the way, maybe I should have asked: Is it only me or others would find a platform independent python API to clear the terminal useful? I write a lot of command-line programs, and I can't remember the last time time I wanted to clear a terminal. But then again, pretty much all of my programs are designed so that they can be used as filters. About 10 years ago I did need to do a text-mode UI (menus, popups, text-entry, etc.), and I used newt. -- Grant Edwards grant.b.edwardsYow! Is a tattoo real, like at a curb or a battleship? gmail.comOr are we suffering in Safeway? -- http://mail.python.org/mailman/listinfo/python-list
Re: multicpu bzip2 using os.system or queue using python script
harijay wrote: I want to quickly bzip2 compress several hundred gigabytes of data using my 8 core , 16 GB ram workstation. Currently I am using a simple python script to compress a whole directory tree using bzip2 and a system call coupled to an os.walk call. I see that the bzip2 only uses a single cpu while the other cpus remain relatively idle. I am a newbie in queue and threaded processes . But I am wondering how I can implement this such that I can have four bzip2 running threads (actually I guess os.system threads ), each using probably their own cpu , that deplete files from a queue as they bzip them. Thanks for your suggestions in advance [snip] Try this: import os import sys from threading import Thread, Lock from Queue import Queue def report(message): mutex.acquire() print message sys.stdout.flush() mutex.release() class Compressor(Thread): def __init__(self, in_queue, out_queue): Thread.__init__(self) self.in_queue = in_queue self.out_queue = out_queue def run(self): while True: path = self.in_queue.get() sys.stdout.flush() if path is None: break report(Compressing %s % path) os.system(bzip2 %s % path) report(Done %s % path) self.out_queue.put(path) in_queue = Queue() out_queue = Queue() mutex = Lock() THREAD_COUNT = 4 worker_list = [] for i in range(THREAD_COUNT): worker = Compressor(in_queue, out_queue) worker.start() worker_list.append(worker) for roots, dirlist, filelist in os.walk(os.curdir): for file in [os.path.join(roots, filegot) for filegot in filelist]: if bz2 not in file: in_queue.put(file) for i in range(THREAD_COUNT): in_queue.put(None) for worker in worker_list: worker.join() -- http://mail.python.org/mailman/listinfo/python-list
Re: python terminology on classes
On 7/27/2010 12:17 AM, Bruno Desthuilliers wrote: destructor Python has no real destructor. You can implement a __del__ method that will _eventually_ be called before the instance gets garbage-collected, but you'd rather not rely on it. Also, implementing this method will prevent cycle detection. That's not correct. The Python language reference is at http://docs.python.org/reference/datamodel.html;. In CPython, either __del__ will be called when the reference count goes to zero, or it won't be called at all. The garbage collector that backs up the reference counting system doesn't delete objects with __del__ methods, because of the usual problems with deletion from a garbage collector. The defined semantics are that loop-free structures are deleted properly, but loops with one object that has a __del__ hang around forever. You can use weak pointers to avoid loops. IronPython and ShedSkin are garbage-collected implementations which have quite different __del__ semantics. That's considered non-standard. In C++, the RAII approach is popular and recommended. In C++, it's routine to create local objects which, when they go out of scope, close a file, unlock a lock, or close a window. It's also widely used in Python, but it's now somewhat deprecated. Python 2.6 has a recently added with clause, borrowed from LISP, for associating actions with scopes. This is supported for files and locks, but setting your own object up for with requires adding special methods to the object. with is less convenient and more limited than RAII, but that's the direction Python is going. This may be in preparation for a move to a real garbage collector. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Updating path.py
Robert Kern wrote: On 7/26/10 5:16 PM, Michael Hoffman wrote: I have been using Jason Orendorff's path.py module for a long time. It is very useful. The only problem is that Python 2.6 deprecates the md5 module it imports, so I (and others using my software) now get this warning whenever they start, which is a little annoying. /homes/hoffman/arch/Linux-x86_64/lib/python2.6/path-2.2-py2.6.egg/path.py:32: DeprecationWarning: the md5 module is deprecated; use hashlib instead The original web page is gone, and e-mails to the author have gone unanswered. It has a public domain license so I could easily fork it and make this small change. The question is what is the best way to do that and ensure continuity with the previous versions. Can I (or someone else) take over the PyPI entry in question? Other suggestions? You cannot take over a project on PyPI. You can only fork the project with a new name. In fact, this has already been done: http://pypi.python.org/pypi/forked-path/0.1 Great, I'll start by trying that, I was hoping someone already had a solution. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
suitable py2app.
Hi, I'm looking for a suitable tutorial for py2app. I googled it but couldn't find anything. Can you help me please? Thanks Ata -- http://mail.python.org/mailman/listinfo/python-list
Re: suitable py2app.
see if this helps http://svn.pythonmac.org/py2app/py2app/trunk/doc/index.html On Tue, Jul 27, 2010 at 11:06 PM, ata.jaf a.j.romani...@gmail.com wrote: Hi, I'm looking for a suitable tutorial for py2app. I googled it but couldn't find anything. Can you help me please? Thanks Ata -- http://mail.python.org/mailman/listinfo/python-list -- Nitin Pawar -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On 7/27/2010 12:58 PM, Daniel Fetchinson wrote:
After getting the technicalities out of the way, maybe I should have asked:
Is it only me or others would find a platform independent python API
to clear the terminal useful?
One problem is, Where would you put it? The OS module is for system
calls, mostly based on posix. The system call involved in clearing a
terminal is a write string call. *nix puts terminal control in a
separate library.
Another is, what next? clear_line? Pretty soon, we are back to curses.
Still another problem is that most of us do not have terminals; we have
screens and use them as such. OS-independent full-screen graphics/game
libraries have clear screen commands. Similary, GUI systems have means
of clearing text and canvas widgets, but should not be able to clear the
whole screen. The turtle module has a clear command for its canvas,
which would be the same regardless of underlying gui. So we already have
several OS independent clear commands.
On Windows, the DOS clr command only works withing a text-mode command
window (once called a dos window). The same thing (os.system('clr')
within an IDLE shell uselessly flashes a blank command window, which
then disappears. Yeah, it is too bad windows did not use the obvious
'clear' like everyone? else. If command windows still imitate or can be
set to imitate ansi terminals, then I would think curses is your best bet.
--
Terry Jan Reedy
--
http://mail.python.org/mailman/listinfo/python-list
pyodbc problem
I have a small problem: I can't get pyodbc to connect to a PostgreSQL
database. All it does is spit out a malformed error message. When I run
this:
==
import pyodbc
dsn = pyodbc.dataSources()
print Data sources:%s % dsn
conn = pyodbc.connect(dsn=marchive)
print ODBC connection: %s % conn
==
I get this:
==
[k...@zappa python]$ python dsncheck.py
Data sources:{'ma': 'PostgreSQL', 'marchive': 'PostgreSQL'}
Traceback (most recent call last):
File dsncheck.py, line 6, in module
conn = pyodbc.connect(dsn=marchive)
pyodbc.Error: ('0', '[0] [unixODBC]c (0) (SQLDriverConnectW)')
==
so the data source exists and is evidently found by connect(), whiuch
seems unable to make sense of it.
The pgsql module works well, but I would prefer to use ODBC because its
not so closely bound to a single RDBMS. unixODBC, which I understand
underlies pyodbc, works OK too:
==
[k...@zappa python]$ isql marchive marchive n/a
+---+
| Connected!|
| |
| sql-statement |
| help [tablename] |
| quit |
| |
+---+
SQL select count(*) from address;
+-+
| count |
+-+
| 32 |
+-+
SQLRowCount returns 1
1 rows fetched
SQL quit
==
Questions:
- Why does pyodbc blow up when its apparently trying to talk to unixODBC?
- What does this mean:
pyodbc.Error: ('0', '[0] [unixODBC]c (0) (SQLDriverConnectW)')
I'm new to Python, though not to Linux, PostgreSQL, ODBC, C or Java.
My rig and software:
Linux: Fedora 12 Where I'm running Python and ODBC,
Lenovo Thinkpad R61i: Core Duo.
Fedora 10 Where PostgreSQL is installed,
IBM NetVista: Pentium III.
PostgreSQL: 8.3.8
Python: 2.6.2
pyodbc 2.1.5-3.fc12 ) By yum from RH repository
unixODBC2.2.14-11.fc12 )
--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |
--
http://mail.python.org/mailman/listinfo/python-list
Re: multicpu bzip2 using os.system or queue using python script
Thanks a tonne..That code works perfectly and also shows me how to think of using queue and threads in my python programs Hari On Jul 27, 1:26 pm, MRAB pyt...@mrabarnett.plus.com wrote: harijay wrote: I want to quickly bzip2 compress several hundred gigabytes of data using my 8 core , 16 GB ram workstation. Currently I am using a simple python script to compress a whole directory tree using bzip2 and a system call coupled to an os.walk call. I see that the bzip2 only uses a single cpu while the other cpus remain relatively idle. I am a newbie in queue and threaded processes . But I am wondering how I can implement this such that I can have four bzip2 running threads (actually I guess os.system threads ), each using probably their own cpu , that deplete files from a queue as they bzip them. Thanks for your suggestions in advance [snip] Try this: import os import sys from threading import Thread, Lock from Queue import Queue def report(message): mutex.acquire() print message sys.stdout.flush() mutex.release() class Compressor(Thread): def __init__(self, in_queue, out_queue): Thread.__init__(self) self.in_queue = in_queue self.out_queue = out_queue def run(self): while True: path = self.in_queue.get() sys.stdout.flush() if path is None: break report(Compressing %s % path) os.system(bzip2 %s % path) report(Done %s % path) self.out_queue.put(path) in_queue = Queue() out_queue = Queue() mutex = Lock() THREAD_COUNT = 4 worker_list = [] for i in range(THREAD_COUNT): worker = Compressor(in_queue, out_queue) worker.start() worker_list.append(worker) for roots, dirlist, filelist in os.walk(os.curdir): for file in [os.path.join(roots, filegot) for filegot in filelist]: if bz2 not in file: in_queue.put(file) for i in range(THREAD_COUNT): in_queue.put(None) for worker in worker_list: worker.join() -- http://mail.python.org/mailman/listinfo/python-list
Re: Why are String Formatted Queries Considered So Magical? (Spammer analysis)
On 7/26/2010 4:19 PM, Justin Smith wrote: Seeking industry expert candidates I’m Justin Smith, Director of Tech Recruiting at Express Seattle. I am currently seeking candidates to fill Tech Positions for multiple A- List Clients: Spammer detected. Injection-Info: r27g2000yqb.googlegroups.com; posting-host=63.170.35.94; posting-account=XlBkJgkAAAC7JNUw8ZEYCvz12vv6mGCK Reverse DNS: franchisevpn.expresspersonnel.com Site analysis: Domain www.expresspersonnel.com redirected to different domain www.expresspros.com Site analysis: From Secure certificate (Secure certificate, high confidence) Express Personnel Services, Inc. Oklahoma City, OK UNITED STATES Oklahoma corporation search: EXPRESS SERVICES, INC. Filing Number: 2400436307 Name Type: Legal Name Status: In Existence Corp type: Foreign For Profit Business Corporation Jurisdiction: COLORADO Formation Date: 28 Aug 1985 Colorado corporation search: ID: 19871524232 Name: EXPRESS SERVICES, INC. Principal Street Address: 8516 NW Expressway, Oklahoma City, OK 73162, United States Target coordinates: 35.56973,-97.668001 Corporate class: Franchiser -- http://mail.python.org/mailman/listinfo/python-list
Which multiprocessing methods use shared memory?
I'm not sure my previous message went through (I wasn't subscribe), so I'm gonna try again. The multiprocessing module has 4 methods for sharing data between processes: Queues Pipes Shared Memory Map Server Process Which of these use shared memory? I understand that the 3rd (Shared Memory Map) does, but what about Queues? Thanks, Kevin _ Hotmail is redefining busy with tools for the New Busy. Get more from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_2 -- http://mail.python.org/mailman/listinfo/python-list
Re: Which multiprocessing methods use shared memory?
Kevin Ar18 wrote: I'm not sure my previous message went through (I wasn't subscribe), so I'm gonna try again. The multiprocessing module has 4 methods for sharing data between processes: Queues Pipes Shared Memory Map Server Process Which of these use shared memory? I understand that the 3rd (Shared Memory Map) does, but what about Queues? The documentation says: class multiprocessing.Queue([maxsize]) Returns a process shared queue implemented using a pipe and a few locks/semaphores. When a process first puts an item on the queue a feeder thread is started which transfers objects from a buffer into the pipe. -- http://mail.python.org/mailman/listinfo/python-list
tkinter unicode question
Just curious if anyone could shed some light on this? I'm using tkinter, but I can't seem to get certain unicode characters to show in the label for Python 3. In my test, the label and button will contain the same 3 characters - a Greek Alpha, a Greek Omega with a circumflex and soft breathing accent, and then a Greek Alpha with a soft breathing accent. For Python 2.6, this works great: # -*- coding: utf-8 -*- from Tkinter import * root = Tk() Label(root, text=u'\u03B1 \u1F66 \u1F00').pack() Button(root, text=u'\u03B1 \u1F66 \u1F00').pack() root.mainloop() However, for Python 3.1.2, the button gets the correct characters, but the label only displays the first Greek Alpha character. The other 2 characters look like Chinese characters followed by an empty box. Here's the code for Python 3: # -*- coding: utf-8 -*- from tkinter import * root = Tk() Label(root, text='\u03B1 \u1F66 \u1F00').pack() Button(root, text='\u03B1 \u1F66 \u1F00').pack() root.mainloop() I've done some research and am wondering if it is because Python 2.6 comes with tk version 8.5, while Python 3.1.2 comes with tk version 8.4? I'm running this on OS X 10.6.4. Here's a link I found that mentions this same problem: http://www.mofeel.net/871-comp-lang-python/5879.aspx If I need to upgrade tk to 8.5, is it best to upgrade it or just install 'tiles'? From my readings it looks like upgrading to 8.5 can be a pain due to OS X still pointing back to 8.4. I haven't tried it yet in case someone might have an easier solution. Thanks for looking at my question. Jay -- http://mail.python.org/mailman/listinfo/python-list
Re: Why are String Formatted Queries Considered So Magical? (Spammer analysis)
John Nagle na...@animats.com writes: On 7/26/2010 4:19 PM, Justin Smith wrote: Seeking industry expert candidates I’m Justin Smith, Director of Tech Recruiting at Express Seattle. I am currently seeking candidates to fill Tech Positions for multiple A- List Clients: Spammer detected. But did you report it? (If so, it helps if you state so). Injection-Info: r27g2000yqb.googlegroups.com; posting-host=63.170.35.94; http://www.spamcop.net/sc?track=63.170.35.94 - looks like abuse goes to the spammer... A whois gives sprint.net, so you could contact abuse at sprint.net (see: http://whois.domaintools.com/63.170.35.94 ) [snip address etc.] Spammers don't care about that. Best course of action, based on my experience, is to contact abuse at googlegroups.com (now and then it actually works), and sprint.net. -- John Bokma j3b Hacking Hiking in Mexico - http://johnbokma.com/ http://castleamber.com/ - Perl Python Development -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows: How to detect whether a Python app/script is running in console/GUI mode?
On Jul 27, 8:36 am, Tim Golden m...@timgolden.me.uk wrote: On 27/07/2010 15:58, Brian Curtin wrote: On Tue, Jul 27, 2010 at 09:36,pyt...@bdurham.com wrote: Windows: How can I detect whether a Python app/script is running in console/GUI mode? By app I mean a script compiled to an exe via py2exe or similar. Thank you, Malcolm I don't remember much about py2exe, but you could check if ``os.path.split(sys.executable)[1]`` equals pythonw.exe (typical for GUIs) or just python.exe (regular console). Don't know whether it's foolproof, but I suspect that checking whether win32console.GetConsoleWindow () returns zero is probably not a bad approach. TJG Executables built with py2exe have an attribute sys.frozen and its value is 'console_exe' for console applications or 'windows_exe' for GUI applications. See for example http://www.py2exe.org/index.cgi/ Py2exeEnvironment. /Jean -- http://mail.python.org/mailman/listinfo/python-list
Re: Why is there no platform independent way of clearing a terminal?
On 2010-07-27, John Nagle na...@animats.com wrote: On 7/27/2010 7:44 AM, Bruno Desthuilliers wrote: Grant Edwards a écrit : On 2010-07-27, Bruno Desthuilliers bruno.42.desthuilli...@websiteburo.invalid wrote: Daniel Fetchinson a ?crit : (snip) Why was clearing a terminal left out? What you're talking about is a shell, not a terminal (a terminal is a physical device). No, what he's talking about is clearing a terminal (or a terminal emulator). They both work the same, the only difference is whether the terminal software is running on dedicated hardware or on general-purpose hardware. (snip) I stand corrected. I immediately thought of using the curses module, but that's UNIX-only, or at least it's not in the ActiveState Python distro. pdcurses: http://pdcurses.sourceforge.net/ is a cross platform curses implementation that is available for Windows. I wonder how difficult it would be to embed into the Python curses module as a backup for systems where curses is not natively available. This would allow Python to provide cross platform charactor mode manipulation. -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter unicode question
In article 20100727204532.r7gmz.27213.r...@cdptpa-web20-z02, jyoun...@kc.rr.com wrote: Just curious if anyone could shed some light on this? I'm using tkinter, but I can't seem to get certain unicode characters to show in the label for Python 3. In my test, the label and button will contain the same 3 characters - a Greek Alpha, a Greek Omega with a circumflex and soft breathing accent, and then a Greek Alpha with a soft breathing accent. For Python 2.6, this works great: # -*- coding: utf-8 -*- from Tkinter import * root = Tk() Label(root, text=u'\u03B1 \u1F66 \u1F00').pack() Button(root, text=u'\u03B1 \u1F66 \u1F00').pack() root.mainloop() However, for Python 3.1.2, the button gets the correct characters, but the label only displays the first Greek Alpha character. The other 2 characters look like Chinese characters followed by an empty box. Here's the code for Python 3: # -*- coding: utf-8 -*- from tkinter import * root = Tk() Label(root, text='\u03B1 \u1F66 \u1F00').pack() Button(root, text='\u03B1 \u1F66 \u1F00').pack() root.mainloop() I've done some research and am wondering if it is because Python 2.6 comes with tk version 8.5, while Python 3.1.2 comes with tk version 8.4? I'm running this on OS X 10.6.4. Most likely. Apparently you're using the Apple-supplied Python 2.6 which, as you say, uses Tk 8.5. If you had installed the python.org 2.6, it would likely fail for you in the same way as 3.1, since both use Tk 8.4. (They both fail for me.) If I need to upgrade tk to 8.5, is it best to upgrade it or just install 'tiles'? From my readings it looks like upgrading to 8.5 can be a pain due to OS X still pointing back to 8.4. I haven't tried it yet in case someone might have an easier solution. OS X 10.6 comes with both Tk 8.4 and 8.5. The problem is that the Python Tkinter(2.6) or tkinter(3.1) is linked at build time, not install time, to one or the other. You would need to at least rebuild and relink tkinter for 3.1 to use Tk 8.5, which means downloading and building Python from source. New releases of python.org installers are now coming in two varieties: the second will be only for 10.6 or later and will link with Tk 8.5. The next new release of Python 3 is likely months away, though. In the meantime, a simpler solution might be to download and install the ActiveState Python 3.1 for OS X which does use Tk 8.5. And your test case works for me with it. -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
urllib timeout
I created a script to access weather satellite imagery fron NOAA's ADDS. It worked fine until recently with Python 2.6. The company changed the Internet LAN connections to Accept Automatic settings and Use automatic configuration script How do you get urllib.urlopen to use the the automatic script configuration? This code worked recently, until the company implemented these LAN connections... SAT_URL = http://adds.aviationweather.gov/data/satellite/ latest_BWI_vis.jpg satpic = urllib.urlopen(SAT_URL, proxies=0 ) satimg = satpic.read() Kelly Dean Fort Collins, CO -- http://mail.python.org/mailman/listinfo/python-list
Re: Binary compatibility across Python versions?
On Jul 26, 2010, at 5:19 PM, Ned Deily wrote: In article i2kok1$kr...@dough.gmane.org, Christian Heimes li...@cheimes.de wrote: [Philip Semanchuk wrote:] Specifically, I'm concerned with binaries created by SWIG for a C++ library that our project uses. We'd like to ship precompiled binaries for Linux, OS X and Windows for Python 2.5 and 2.6. I'm hoping that it is sufficient to create binaries for each Python for each platform (3 * 2 == 6 total precompiled binaries). For each platforms you have to provide binaries for the major CPU architectures (X86 and X64_86), too. Users or distributions may compile Python with UCS-2 or UCS-4 unicode width. That makes eight different binaries for Linux (two version * two archs * UCS2/4). Although most distributions follow the LSB standards, binaries aren't necessary ABI compatible. C++ binaries tend to break more often than C binaries. And, on OS X, there are various Python binary distributions in common use: the Apple-supplied Pythons (2.5 for OS X 10.5, 2.6 2.5 for 10.6), the python.org OS X installers for 10.5 and 10.6, plus the ActiveState and EPD ones. It would likely be difficult to ship one binary extension that would easily work, if at all, with the most common ones. For instance, the Apple-supplied Python 2.6 is built with gcc 4.2, uses the 10.6 ABI (SDK deployment target), and x86_64 / i386 / ppc architectures (default 64-bit on capable machines). The python.org 2.6 uses gcc 4.0, the 10.4u ABI, and is 32-bit only (i386 / ppc) Thanks to all who replied on this topic. A little more background -- these binaries are just a convenience for our users and we don't have to cover every possible permutation of Python, only the ones we think will be most common in our user base. That said, thanks to the things you pointed out, I'm beginning to think that our users might be such a varied group that precompiled binaries might not be worth the trouble. Ned, I'm on Mac and I was under the impression that the deployment target compiler option would control how the resulting binary (in this case, Python) called OS X but it wouldn't have any affect on how other code (like our library) called Python. Is that not the case? Thanks Philip -- http://mail.python.org/mailman/listinfo/python-list
Re: newb
On Tue, 27 Jul 2010 11:07:09 GMT, whitey m...@here.com wrote: hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. Yes, Python Tutor list is specifically aimed for beginners. You can access it by subscribing to either tu...@python.org or gmane.comp.python.tutor would still be valid? Mostly yes. However I'd recommend getting a more updated book especially if you're a beginner. -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib timeout
kBob wrote: I created a script to access weather satellite imagery fron NOAA's ADDS. It worked fine until recently with Python 2.6. The company changed the Internet LAN connections to Accept Automatic settings and Use automatic configuration script How do you get urllib.urlopen to use the the automatic script configuration? This code worked recently, until the company implemented these LAN connections... SAT_URL = http://adds.aviationweather.gov/data/satellite/ latest_BWI_vis.jpg satpic = urllib.urlopen(SAT_URL, proxies=0 ) satimg = satpic.read() For the record, I got: import urllib SAT_URL = http://adds.aviationweather.gov/data/satellite/latest_BWI_vis.jpg; satpic = urllib.urlopen(SAT_URL, proxies=0 ) Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\urllib.py, line 79, in urlopen opener = FancyURLopener(proxies=proxies) File C:\Python26\lib\urllib.py, line 617, in __init__ URLopener.__init__(self, *args, **kwargs) File C:\Python26\lib\urllib.py, line 129, in __init__ assert hasattr(proxies, 'has_key'), proxies must be a mapping AssertionError: proxies must be a mapping However, urllib.urlretrieve(...) works. -- http://mail.python.org/mailman/listinfo/python-list
Re: Binary compatibility across Python versions?
In article 0a4c9b21-6eff-461a-b15c-415d1408d...@semanchuk.com, Philip Semanchuk phi...@semanchuk.com wrote: [...] Thanks to all who replied on this topic. A little more background -- these binaries are just a convenience for our users and we don't have to cover every possible permutation of Python, only the ones we think will be most common in our user base. That said, thanks to the things you pointed out, I'm beginning to think that our users might be such a varied group that precompiled binaries might not be worth the trouble. Ned, I'm on Mac and I was under the impression that the deployment target compiler option would control how the resulting binary (in this case, Python) called OS X but it wouldn't have any affect on how other code (like our library) called Python. Is that not the case? Even if your extension modules and libraries don't make a lot of system calls, I think it's a bit of a crap shoot since there are no guarantees of compatibility among the various popular distributions and there are the gcc-4.0 vs -4.2 and the arch differences. You'd have to try the various combinations and/or limit the configurations you support. The bottom line is that many (most?) package developers have given up on trying to supply binary distributions for OS X. Since Apple supplies the necessary developer tools for free with recent OS X releases and in most cases Distutils does the right thing, the burden on end users isn't particularly onerous (see, for example, http://appscript.sourceforge.net/py-appscript/install.html). Now, adding SWIG and C++ to the mix may result in a different answer. I don't have any practical experience with them to have an opnion. Good luck! -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib timeout
On Jul 27, 4:23 pm, MRAB pyt...@mrabarnett.plus.com wrote: kBob wrote: I created a script to access weather satellite imagery fron NOAA's ADDS. It worked fine until recently with Python 2.6. The company changed the Internet LAN connections to Accept Automatic settings and Use automatic configuration script How do you get urllib.urlopen to use the the automatic script configuration? This code worked recently, until the company implemented these LAN connections... SAT_URL = http://adds.aviationweather.gov/data/satellite/ latest_BWI_vis.jpg satpic = urllib.urlopen(SAT_URL, proxies=0 ) satimg = satpic.read() For the record, I got: import urllib SAT_URL = http://adds.aviationweather.gov/data/satellite/latest_BWI_vis.jpg; satpic = urllib.urlopen(SAT_URL, proxies=0 ) Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\urllib.py, line 79, in urlopen opener = FancyURLopener(proxies=proxies) File C:\Python26\lib\urllib.py, line 617, in __init__ URLopener.__init__(self, *args, **kwargs) File C:\Python26\lib\urllib.py, line 129, in __init__ assert hasattr(proxies, 'has_key'), proxies must be a mapping AssertionError: proxies must be a mapping However, urllib.urlretrieve(...) works.- Hide quoted text - - Show quoted text - I saw that, but I still get the same error time out error ... import urllib SAT_URL = http://adds.aviationweather.gov/data/satellite/; SAT_FILE = latest_BWI_vis.jpg satimg = urllib.urlretrieve( SAT_URL, SAT_FILE ) Traceback (most recent call last): File stdin, line 1, in module File c:\python26\lib\urllib.py, line 93, in urlretrieve return _urlopener.retrieve(url, filename, reporthook, data) File c:\python26\lib\urllib.py, line 237, in retrieve fp = self.open(url, data) File c:\python26\lib\urllib.py, line 205, in open return getattr(self, name)(url) File c:\python26\lib\urllib.py, line 344, in open_http h.endheaders() File c:\python26\lib\httplib.py, line 904, in endheaders self._send_output() File c:\python26\lib\httplib.py, line 776, in _send_output self.send(msg) File c:\python26\lib\httplib.py, line 735, in send self.connect() File c:\python26\lib\httplib.py, line 716, in connect self.timeout) File c:\python26\lib\socket.py, line 514, in create_connection raise error, msg IOError: [Errno socket error] [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or establis hed connection failed because connected host has failed to respond Kelly -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib timeout
kBob wrote: On Jul 27, 4:23 pm, MRAB pyt...@mrabarnett.plus.com wrote: kBob wrote: I created a script to access weather satellite imagery fron NOAA's ADDS. It worked fine until recently with Python 2.6. The company changed the Internet LAN connections to Accept Automatic settings and Use automatic configuration script How do you get urllib.urlopen to use the the automatic script configuration? This code worked recently, until the company implemented these LAN connections... SAT_URL = http://adds.aviationweather.gov/data/satellite/ latest_BWI_vis.jpg satpic = urllib.urlopen(SAT_URL, proxies=0 ) satimg = satpic.read() For the record, I got: import urllib SAT_URL = http://adds.aviationweather.gov/data/satellite/latest_BWI_vis.jpg; satpic = urllib.urlopen(SAT_URL, proxies=0 ) Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\urllib.py, line 79, in urlopen opener = FancyURLopener(proxies=proxies) File C:\Python26\lib\urllib.py, line 617, in __init__ URLopener.__init__(self, *args, **kwargs) File C:\Python26\lib\urllib.py, line 129, in __init__ assert hasattr(proxies, 'has_key'), proxies must be a mapping AssertionError: proxies must be a mapping However, urllib.urlretrieve(...) works.- Hide quoted text - - Show quoted text - I saw that, but I still get the same error time out error ... import urllib SAT_URL = http://adds.aviationweather.gov/data/satellite/; SAT_FILE = latest_BWI_vis.jpg satimg = urllib.urlretrieve( SAT_URL, SAT_FILE ) Traceback (most recent call last): File stdin, line 1, in module File c:\python26\lib\urllib.py, line 93, in urlretrieve return _urlopener.retrieve(url, filename, reporthook, data) File c:\python26\lib\urllib.py, line 237, in retrieve fp = self.open(url, data) File c:\python26\lib\urllib.py, line 205, in open return getattr(self, name)(url) File c:\python26\lib\urllib.py, line 344, in open_http h.endheaders() File c:\python26\lib\httplib.py, line 904, in endheaders self._send_output() File c:\python26\lib\httplib.py, line 776, in _send_output self.send(msg) File c:\python26\lib\httplib.py, line 735, in send self.connect() File c:\python26\lib\httplib.py, line 716, in connect self.timeout) File c:\python26\lib\socket.py, line 514, in create_connection raise error, msg IOError: [Errno socket error] [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or establis hed connection failed because connected host has failed to respond It should be like this: SAT_URL = http://adds.aviationweather.gov/data/satellite/latest_BWI_vis.jpg; SAT_FILE = rC:\latest_BWI_vis.jpg urllib.urlretrieve(SAT_URL, SAT_FILE) -- http://mail.python.org/mailman/listinfo/python-list
subprocess module under python 2.7
I am using the following code to hide the console window when launching a subprocess under Windows. startupinfo = subprocess.STARTUPINFO() startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW startupinfo.wShowWindow = subprocess.SW_HIDE self.mplayer = Popen(args, bufsize=0, #unbufferred stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=False, universal_newlines=True, startupinfo=startupinfo ) This worked okay in using the subprocess module under python 2.6, but under python 2.7 I get the error: Exception in thread Thread-1: Traceback (most recent call last): File threading.pyo, line 530, in __bootstrap_inner File gui\mplayer_ctrl.pyo, line 93, in run AttributeError: 'module' object has no attribute 'STARTF_USESHOWWINDOW' Anything changed between python versions to account for this? Best regards, Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess module under python 2.7
On Tue, Jul 27, 2010 at 4:12 PM, Timothy W. Grove tim_gr...@sil.org wrote: I am using the following code to hide the console window when launching a subprocess under Windows. startupinfo = subprocess.STARTUPINFO() startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW startupinfo.wShowWindow = subprocess.SW_HIDE self.mplayer = Popen(args, bufsize=0, #unbufferred stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=False, universal_newlines=True, startupinfo=startupinfo ) This worked okay in using the subprocess module under python 2.6, but under python 2.7 I get the error: Exception in thread Thread-1: Traceback (most recent call last): File threading.pyo, line 530, in __bootstrap_inner File gui\mplayer_ctrl.pyo, line 93, in run AttributeError: 'module' object has no attribute 'STARTF_USESHOWWINDOW' Anything changed between python versions to account for this? Yes, apparently the code importing that stuff got removed: http://svn.python.org/view/python/tags/r27/Lib/subprocess.py?r1=79064r2=82504 FWIW, STARTUPINFO(), STARTF_USESHOWWINDOW, and SW_HIDE were/are undocumented in both Python versions and thus shouldn't be relied upon. They can be accessed via Python's win32-specific modules instead (see diff). Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Are those features still the same?
On 07/25/2010 11:02 AM, francogrex wrote: Terry Reedy wrote: As other have said, mostly, but I would change the following... Thanks for all those who replied. I know these are not all the features but some of them and again this is not a comparison but a little taste of what python offers today, and the replies were very informative. By the way Peter Norvig is not biased, he works for Google research and is a supporter of programming in any language, especially in Python. Had I known the table was headed with Python for Lisp programmers, I would have responded differently - but you chose to hide that ;-) -- http://mail.python.org/mailman/listinfo/python-list
Re: newb
On 7/27/10 4:07 AM, whitey wrote: hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. i have bought a book for $2 called learn to program using python by alan gauld. starting to read it but it was written in 2001. presuming that the commands and info would still be valid? any websites or books that are a must for beginners? any input would be much appreciated...cheers Alan Gauld posts fairly regularly over on the python-tutor mailing list, as well as here. He has newer material on his website @ http://www.alan-g.me.uk/, and if you google 'python tutorial' you'll probably find more material than you can shake a stick at - from web pages to books (both online and dead-tree) to You-Tube videos. One book that helps me out quite a bit is John Zelle's Python Programming: An Introduction to Computer Science. Just be aware there is a first edition (covers python 2.x) and a newer second edition (python 3.x) - both available from Amazon. -- http://mail.python.org/mailman/listinfo/python-list
Re: newb
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 07/27/2010 04:07 AM, whitey wrote: hi all. am totally new to python and was wondering if there are any newsgroups that are there specifically for beginners. i have bought a book for $2 called learn to program using python by alan gauld. starting to read it but it was written in 2001. presuming that the commands and info would still be valid? any websites or books that are a must for beginners? any input would be much appreciated...cheers It may also depend on which version of Python you wish to use. Since you're a newb, I'd probably suggest starting off with Python 3. The version in your book is probably version 2.*. The difference is minor, but, when you're starting off (I assume with computer languages in general?) the difference in syntax can kick you where it hurts. Programs that work with Python 2.*, may not work with Python 3. However, I suggest Python 3 since it seems to be the code of tomorrow. It may also depend on what you wish to do with your knowledge of Python (applications, games, web frameworks, etc.) If you want to make games, I suggest also learning about pyGame. As for book versus website, I started off with, as others have mentioned, learning online. Not only is it free, but the boundary between page and screen is broken. Note though that some off-sites (Wikibooks for instance) may not be complete in their writing. Python.org has a wealth of knowledge about almost everything involving Python. However, *some* of the documentation there may not be suitable for absolute beginners. There are several links there to other good websites for those with no experience in coding, all the way up to a ridiculously complicated level. I highly suggest poking around there. If you wish to read a book instead, try: http://www.amazon.com/Python-Programming-Absolute-Beginner-3rd/dp/1435455002/ Or go to your local library and poke there. :) Good luck! - -- People should read more. https://secure.wikimedia.org/wikipedia/en/wiki/User:MithrandirAgain All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost. - From the ashes a fire shall be woken, a light from the shadows shall spring; renewed shall be blade that was broken, the crownless again shall be king. -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJMT5PPAAoJEKo37V1xH7gTct0IAJrhBXLD5snWBBnrvpr4G3KI 7NV+yxZAphuqXXIj/F97+TKXVgld5PaWkguFjIb5CbBcYZxBP6lk+9c014422BnH yKjmdzC0eJhg0D3FL6Vdnrw3fn2UGZNzbFRp6FDv+calxyIJS3u/hWf8nW4HiHim Q4Xe+Df5tP5OrkiuHAs34xwco/ln5g2x5lJJRZD5eyxHKi70p9ipQZ5p5f5XB/Jw pIvBNIC54Xm9PZUHAeEQIeF/cPeIvE8CEvf7xrbf1LbboB6LqwIqKqpeF7Ae7sq2 x0duNq4H7Llrl5iOMKBPEyYO23VF8T6heVbDCVH6yT4uSc6qnt+6StNVmnRrI8E= =cEZW -END PGP SIGNATURE- -- http://mail.python.org/mailman/listinfo/python-list
Re: Are those features still the same?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 07/26/2010 11:58 PM, Lawrence D'Oliveiro wrote: In message i2gujh$sl...@news.eternal-september.org, francogrex wrote: By the way Peter Norvig is not biased, he works for Google research and is a supporter of programming in any language, especially in Python. Bias doesn’t have to be a conscious thing. Correct. It just has to have a rainbow logo and own half the internet. :) - -- People should read more. https://secure.wikimedia.org/wikipedia/en/wiki/User:MithrandirAgain All that is gold does not glitter, not all those who wander are lost; the old that is strong does not wither, deep roots are not reached by the frost. - From the ashes a fire shall be woken, a light from the shadows shall spring; renewed shall be blade that was broken, the crownless again shall be king. -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJMT5VTAAoJEKo37V1xH7gTobAH/1QY0SN6BulkNO3QUFrzg5cO OkeDTbTmI4BJ1M/hmkECU+T76KfnkQ13NobLroWt/UJU8YA4lOQ6KsJU/EsR/27n TFrUxs3gDVeWyiKdSbWtVSZ7b7BJ8Tr41hMPkA1wyK85qJW5mA19h0hndqs/BRtg j2GWPLNv9wx7+v0gQnv7ZgSQJHSlRvp8oi016QVl3W7OcO6B0rgwWx4i1hxz/oij Wd1jF5wwhtgw/0durTFFVt7mR31l3/6zz2WrwvC9fQkSKNQ0oaNgKXZOtctWVdcV XNm+W9I9Sx70F1qO+VfFrHIRJ+kzjCf6/48bumaygol4MnbLIJ3lJ1BNIESIFAg= =iv9B -END PGP SIGNATURE- -- http://mail.python.org/mailman/listinfo/python-list
The Miracle and Challenge of the Quran
The Miracle and Challenge of the Quran ------ http://www.youtube.com/watch?v=m3A8R...layer_embedded http://www.youtube.com/watch?v=m3A8R...layer_embedded ------ Do you know Islam ? Try VISIT THESE SITES ISLAM RELIGION http://www.islamreligion.com/ SCIENE ISLAM http://www.islamreligion.com/ YOUTUBE ISLAM http://youtubeislam.com/ BIBLE ISLAM http://www.bibleislam.com/ MINISTRY OF AWKAF http://www.islamic-council.org/ ISLAM WORD http://islamworld.net/ ISLAM HOUSE http://www.islamhouse.com/ SUNNAH ONLINE http://www.sunnahonline.com/ilm/dawah/index.htm ----- The Miracle and Challenge of the Quran With an introduction by Magdy Abd Al-SHafy The Holy Quran is a miracle that beggars de**ion , words fail to describe this miracle , it is a miracle in the full sense of the term . Different specialists , according to the branch of science they are specialized in , find it miraculous . Prophet Mohummed said commenting on the Holy Quran saying it unfolds the secrets of the nations that preceded you , and secrets of the future treasured in it It is the Holy Book that Jinnee , on hearing to it , did not leave their place till they believed in it . It is the book which unbelievers gave positive witness to . Dr. Keith L. Moore is a Professor of Anatomy and Cell Biology, University of Toronto, Toronto, Canada. He is a world renowned scientist and a distinguished researcher in the fields of anatomy and embryology, he has published more than 150 research articles, chapters and books in this field. He is the author of several medical books, such as the widely used and acclaimed The Developing Human: Clinically oriented Embryology (now in it's fifth edition, and translated into eight different languages), Before We Are Born and Clinically Oriented Anatomy. He has also recently co-authored Qur'an and Modern Science, Correlation Studies. Dr. Moore is the recipient of numerous awards and honors, including, in 1984, the J.C.B. Grant Award, which is the highest honor granted by the Canadian Association of Anatomists. He has served in many academic and administrative positions, including the President of the Canadian Association of Anatomists, 1968-1970. Let us see what Dr. Moore's opinion is on the scientific statements regarding embryology to be found in the Qur'an: Dr. Moore was contacted by a Muslim scholar by the name of Abdul- Majeed Azzindani. He was asked to participate in a three-year study of around twenty-five verses of the Qur'an and the Sunnah (sayings of Muhammad, pbuh) which speak about embryology, and to determine the their correspondence to modern scientific discoveries. Dr. Moore's conclusion regarding this matter was: For the past three years, I have worked with the Embryology Committee of King Abdulaziz University in Jeddah, Saudi Arabia, helping them to interpret the many statements in the Qur'an and the Sunnah referring to human reproduction and prenatal development. At first I was astonished by the accuracy of the statements that were recorded in the seventh century AD, before the science of embryology was established. Although I was aware of the glorious history of Muslim scientists in the 10th century AD, and of some of their contributions to Medicine, I knew nothing about the religious facts and beliefs contained in the Qur'an and Sunnah. It is important for Islamic and other students to understand the meaning of these Qur'anic statements about human development, based on current scientific knowledge. The interpretations of the verses in the Qur'an and the Sunnah, translated by Shaikh Azzindani, are to the best of my knowledge accurate. From the forward of The Developing Human: Clinically oriented Embryology, third edition, by Dr. Keith L. Moore. The Qur'an and the Sunnah of the prophet Muhammad (Sallalahu Alayhi Wa Salam) provide a very detailed de**ion of the microscopic development of the human embryo from a mere sperm drop up to the stage of a completely formed human being. It is well known that microscopes were not developed until the sixteenth century AD, and even at that were very crude in design. Zacharias Janssen is credited with having invented the compound microscope in about 1590. With it, remarkable scientific discoveries were made in the 17th and 18th centuries. The Dutch naturalist Anthony van Leeuwenhoek produced lenses powerful enough to prove that many tiny creatures are not spontaneously generated but come from eggs. Before this period, theories on human reproduction ran rampant. Some scientist believed that the menstrual blood itself developed into the fetus. Later on, a new theory was developed wherein the sperm drop was popularly believed to
Where is the help page for re.MatchObject?
I know the library reference webpage for re.MatchObject is at http://docs.python.org/library/re.html#re.MatchObject But I don't find such a help page in python help(). Does anybody know how to get it in help()? help(re.MatchObject) Traceback (most recent call last): File stdin, line 1, in module AttributeError: 'module' object has no attribute 'MatchObject' -- Regards, Peng -- http://mail.python.org/mailman/listinfo/python-list
Re: How to capture all the environment variables from shell?
On 07/26/10 22:42, quoth Tim Chase:
On 07/26/10 21:26, Steven W. Orr wrote:
Please! Never export anything from your .bashrc unless you
really know what you're doing. Almost all exports should be
done in your .bash_profile
Could you elaborate on your reasoning why (or why-not)? I've found that
my .bash_profile doesn't get evaluated when I crank up another terminal
window, while my bashrc does. Thus I tend to put my exports in my
~/.bashrc so they actually take effect in my shell...
-tkc
I'm happy to elaborate, but people should feel free to stop me if they're not
interested. The topic is bash:
When you log in you get your .bash_profile and not the .bashrc. Subshells get
the .bashrc and not the .bash_profile. If you set your envvars in your
.bash_profile then you don't need to reset them in subshells because they all
get inherited. (Inheritance of envvars is, after all, the reason that they are
envvars and not just local variables.)
The way you get your .bashrc to happen at login time is that you have to make
it happen yourself. In your .bash_profile, just say this:
. ~/.bashrc
The one time that you should set an envvar in your .bashrc is when you are not
an interactive shell. In that case you can set your PATH var in your .bashrc
by first testing to see if you're interactive: In your .bashrc just say:
[[ -z $PS1 ]] set_PATH_cmds
# Of course, note that set_PATH_cmds is not a subprocess. It has to
# be either a PATH= or function that accomplishes the same thing.
This solves the problem of things like
ssh somemachine cmd
where cmd is something that you would only find on your PATH if you properly
logged in.
As far as X goes, I am starting from the premise that your X session will be
set up to cause your .bash_profile to happen at login time.
One last note: If you say something like
export PATH=$PATH:/usr/local/bin
then re-sourcing your .bash_profile will cause your PATH value to double up.
That's why I set my PATH variable explicitly.
After that, I encourage people to set up their PATH variables so that they are
broken into four distinct sections in the following order. (The idea is to
make your stuff override the system supplied stuff.) (The stuff below is just
an example.)
USERPERSONAL=~/bin:~/share/bin
MACHINESPECIALS=/usr/local/bin:/usr/local/share/bin
OPTIONALADDONS=/opt/Adobe/Reader9/bin:/opt/openoffice.org3/program
VENDORPATHS=/bin:/usr/bin:/usr/X11R6/bin
PATH=${USERPERSONAL}:${MACHINESPECIALS}:${OPTIONALADDONS}:${VENDORPATHS}
--
Time flies like the wind. Fruit flies like a banana. Stranger things have .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net
signature.asc
Description: OpenPGP digital signature
--
http://mail.python.org/mailman/listinfo/python-list
Re: Which multiprocessing methods use shared memory?
On 7/27/2010 12:30 PM, MRAB wrote: Kevin Ar18 wrote: I'm not sure my previous message went through (I wasn't subscribe), so I'm gonna try again. The multiprocessing module has 4 methods for sharing data between processes: Queues Pipes Shared Memory Map Server Process Which of these use shared memory? I understand that the 3rd (Shared Memory Map) does, but what about Queues? The documentation says: class multiprocessing.Queue([maxsize]) Returns a process shared queue implemented using a pipe and a few locks/semaphores. When a process first puts an item on the queue a feeder thread is started which transfers objects from a buffer into the pipe. Python's shared memory between processes is un-Pythonic. You can't share Python object, only C objects. The locking mechanisms are very limited, and slow; locking actually takes place via messages over pipes. There's no dynamic allocation in the shared area. Realistically, if you're using Python, you're not that concerned about compute speed. So don't bother with shared memory, which is a performance optimization. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
[issue9205] Parent process hanging in multiprocessing if children terminate unexpectedly
Greg Brockman g...@ksplice.com added the comment: You can't have a sensible default timeout, because the worker may be processing something important... In my case, the jobs are either functional or idempotent anyway, so aborting halfway through isn't a problem. In general though, I'm not sure what kinds of use cases would tolerate silently-dropped jobs. And for example, if an OOM kill has just occurred, then you're already in a state where a job was unexpectedly terminated... you wouldn't be violating any more contracts by aborting. In general, I can't help but feel that the approach of ignore errors and keep going leads to rather unexpected bugs (and in this case, it leads to infinite hangs). But even in languages where errors are ignored by default (e.g. sh), there are mechanisms for turning on abort-on-error handlers (e.g. set -e). So my response is yes, you're right that there's no great default here. However, I think it'd be worth (at least) letting the user specify if something goes wrong, then abort. Keep in mind that this will only happen in very exceptional circumstances anyway. Not everything can be simple. Sure, but given the choice between a simple solution and a complex one, all else being equal the simple one is desirable. And in this case, the more complicated mechanism seems to introduce subtle race conditions and failures modes. Anyway, Jesse, it's been a while since we've heard anything from you... do you have thoughts on these issues? It would probably be useful to get a fresh opinion :). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9205 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9334] argparse does not accept options taking arguments beginning with dash (regression from optparse)
Steven Bethard steven.beth...@gmail.com added the comment: It *would* be a backwards incompatible change. Currently, if I have a parser with both a --foo and a --bar option, and my user types --foo --bar, they get an error saying that they were missing the argument to --foo. Under your proposal, the --foo option will now silently consume the --bar option without an error. I know this is good from your perspective, but it would definitely break some of my scripts, and I imagine it would break other people's scripts as well. As I keep saying, I'm happy to add your alternative parsing as an option (assuming you provide a patch), but I really don't think it's the right thing to do by default. Most command line programs don't have options that take other option-like things as arguments (which is the source of your problem), so in most command line programs, people want an error when they get an option they don't recognize or an option that's missing its argument. Under your proposal, more such errors will pass silently and will have to be caught by additional code in the script. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9334 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9387] Make python -m tkinter run tkinter demo
Éric Araujo mer...@netwok.org added the comment: The note seems fine to me. I’d used a semicolon, not a period, but that’s just me. You want to use `` to mark up code, not `. Aside: I’ve been told before not to do wrapping or whitespace changes unrelated to the object of my patch, to ease review. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue9387 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1682942] ConfigParser support for alt delimiters
Changes by Łukasz Langa luk...@langa.pl: Removed file: http://bugs.python.org/file18216/issue1682942.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1682942 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1682942] ConfigParser support for alt delimiters
Łukasz Langa luk...@langa.pl added the comment: Updated the patch after review by Brian Curtin and Alexander Belopolsky. All remarks addressed, I think it's ready for inclusion. -- Added file: http://bugs.python.org/file18219/issue1682942.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1682942 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7198] csv.writer
Andreas Balogh balo...@gmail.com added the comment: I encountered the same problem. It is unclear that using binary mode for the file is solving the problem. I suggest to add a hint to the documentation. -- nosy: +baloan ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7198 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
