Ruby doctest
I monitor changes to the Wikipedia doctest page, and so noticed a change in the Ruby implementation of doctest. Scooting around their implementation I found that they have an !!! special directive that says drop into the interpreter at this point when testing allowing debugging in context. http://github.com/tablatom/rubydoctest/wikis/special-directives - Paddy. -- http://mail.python.org/mailman/listinfo/python-list
Re: flock seems very unsafe, python fcntl bug?
Your problem is that open(...,'w') is not locked.
Use something like:
lockf = open('aaa', 'a')
fnctl.flock(lockf,fnctl.LOCK_EX)
file = open('aaa', 'w')
file.write('asdf')
file.close()
lockf.close()
[EMAIL PROTECTED] wrote:
I ran following 2 programs (lock1, lock2) at almost same time,
to write either 123456, or 222 to file aaa at the same time.
But I often just got 222456 in aaa .
Is this a bug of python fcntl module ? See 2 programs I ran:
#!/usr/bin/env python
import fcntl, time
file = open('aaa', w)
fcntl.flock(file, fcntl.LOCK_EX)
file.write('123456')
time.sleep(10)
file.close()
#!/usr/bin/env python
import fcntl, time
file = open('aaa', w)
fcntl.flock(file, fcntl.LOCK_EX)
file.write('222')
time.sleep(10)
file.close()
--
http://mail.python.org/mailman/listinfo/python-list
Re: Fast and easy GUI prototyping with Python
Michael Torrie [EMAIL PROTECTED]: [EMAIL PROTECTED] wrote: 2) The Qt vs. .NET API. I have no experience with Qt's API and a rudimentary experience with the .NET API (seems powerfull but also big and complex). Qt's API is very very good. Easy to use and extremely powerful. Note that in Python a number of Qt's APIs are not used in favor of Python native apis for things like file and socket I/O, IPC, Threads, and so forth. The support for signals and slots is imho a strong reason to prefer Qt apis over standard python apis, especially when it comes down to asynchronous programming (for instance, large network transfers like file downloads). I've not used VS 2008's SWF gui designer, but of all the designers I've seen so far, Qt's Designer is the best I've ever used. full ack. -- Freedom is always the freedom of dissenters. (Rosa Luxemburg) -- http://mail.python.org/mailman/listinfo/python-list
Storing value with limits in object
I'm trying to limit a value stored by object (either int or float): class Limited(object): def __init__(self, value, min, max): self.min, self.max = min, max self.n = value def set_n(self,value): if value self.min: # boundary check self.n = self.min if value self.max: self.n = self.max else: self.n = value n = property(lambda self : self._value, set_n) This works, except I would like the class to behave like built-in types, so I can use it like this: a = Limited(7, 0, 10) b = math.sin(a) So that object itself returns it's value (which is stored in a.n). Is this possible? -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
On Sun, Jun 22, 2008 at 11:44 AM, Josip [EMAIL PROTECTED] wrote: I'm trying to limit a value stored by object (either int or float): class Limited(object): def __init__(self, value, min, max): self.min, self.max = min, max self.n = value def set_n(self,value): if value self.min: # boundary check self.n = self.min if value self.max: self.n = self.max else: self.n = value n = property(lambda self : self._value, set_n) This works, except I would like the class to behave like built-in types, so I can use it like this: a = Limited(7, 0, 10) b = math.sin(a) So that object itself returns it's value (which is stored in a.n). Is this possible? Not with normal vars, because = is a rebinding operator in Python, rather than assignment. You can do (close to) the above with object properties. David. -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
Not with normal vars, because = is a rebinding operator in Python, rather than assignment. You can do (close to) the above with object properties. David. Yes, but it's done with built-in types like int and float. I suspect I could subclass from them and implement limits, but I would have to make seperate class for each type. Can I override conversion methods like int() and float() within my class? -- http://mail.python.org/mailman/listinfo/python-list
Learning Python in a group
Hi all, I'm looking to learn Python (as my first programming language) and I'm pretty sure I'd be more successful doing this with a group of other people. I've currently got one other person to learn with me, and we plan to work remotely over the net using tools such as IM/VoiP/Gobby/WIkis etc. We'd still like a few others to work with us, with a group of about 5 or 6 being seen as ideal. We'd also like to find somebody to act as a mentor/guide who might be happy to meet with us once every couple of weeks to help keep us moving in the right direction and find solutions to problems when we get really stuck! Wondered if there was anybody here who might be interested in working with us in either of these roles? We both have differing goals, but ultimately we'd just like to get more familiar so that we can provide some simple fixes to packages we maintain/scratch a few itches of our own. Any one is welcome, no matter what your own aim :) Would love to hear feedback, especially from anyone who's interested in working with us... Best, Jon -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
I'm a beginner, too.But python wasn't my first programming language. On Sun, Jun 22, 2008 at 6:43 PM, Jonathan Roberts [EMAIL PROTECTED] wrote: Hi all, I'm looking to learn Python (as my first programming language) and I'm pretty sure I'd be more successful doing this with a group of other people. I've currently got one other person to learn with me, and we plan to work remotely over the net using tools such as IM/VoiP/Gobby/WIkis etc. We'd still like a few others to work with us, with a group of about 5 or 6 being seen as ideal. We'd also like to find somebody to act as a mentor/guide who might be happy to meet with us once every couple of weeks to help keep us moving in the right direction and find solutions to problems when we get really stuck! Wondered if there was anybody here who might be interested in working with us in either of these roles? We both have differing goals, but ultimately we'd just like to get more familiar so that we can provide some simple fixes to packages we maintain/scratch a few itches of our own. Any one is welcome, no matter what your own aim :) Would love to hear feedback, especially from anyone who's interested in working with us... Best, Jon -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
On Sun, Jun 22, 2008 at 12:24 PM, Josip [EMAIL PROTECTED] wrote: Not with normal vars, because = is a rebinding operator in Python, rather than assignment. You can do (close to) the above with object properties. David. Yes, but it's done with built-in types like int and float. I suspect I could subclass from them and implement limits, but I would have to make seperate class for each type. Can I override conversion methods like int() and float() within my class? I think I may have misread your original post. ints and floats are internal , immutable types, with some class goodness on top (so you can treat them like objects to a degree, subclass from them, etc). Python's interpreter has built-in logic which 'knows' how to use ints and floats variables, without calling their special __ methods. Python would be a lot slower if it worked this way. To do exactly what you want, you'd need to add a new internal numeric type to Python. You can subclass from float, and redefine __float__ and __int__, but those will only be called when your code actually calls the builtin float() and int() builtins, eg: import math class Float(float): def __float__(self): raise NotImplementedError a = Float(1) print math.sin(a) # Outputs 0.841470984808 a = Float(1) print math.sin(float(a)) # Throws a NotImplementedError exception There is no way (afaik) for an object to tell Python to call one of it's methods to get a reference, or 'value' to the object (if there was, it would make things really complicated). In Python you generally need to update the logic used during a lookup to get that effect (ie, in a.b.c, you can customise the a.b lookup, or the a.b.c lookup, but not the a lookup itself). In theory you could hack Python's internal locals or globals dictionary so that it did something unusual while looking up your object. But in practice this doesn't work, because the returned objects (when you call globals() or locals()) attributes are readonly. Probably because those internal lookup dicts are implemented in optimized C not Python, and the C implementation doesn't let you redefine it's internals via the Python interface. David. -- http://mail.python.org/mailman/listinfo/python-list
Re: Fast and easy GUI prototyping with Python
2008/6/21 Val-Amart [EMAIL PROTECTED]: Use PyQt. You will gain great portability +all the functionality built in qt. You can try PyGTK also, though i wont recommend it. Why would you not recommend it? I've been using it for a mall project, and would like to know if there's some pit waiting for me to fall into. Pete -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
On Sun, Jun 22, 2008 at 12:43 PM, Jonathan Roberts [EMAIL PROTECTED] wrote: Hi all, I'm looking to learn Python (as my first programming language) and I'm pretty sure I'd be more successful doing this with a group of other people. I've currently got one other person to learn with me, and we plan to work remotely over the net using tools such as IM/VoiP/Gobby/WIkis etc. We'd still like a few others to work with us, with a group of about 5 or 6 being seen as ideal. We'd also like to find somebody to act as a mentor/guide who might be happy to meet with us once every couple of weeks to help keep us moving in the right direction and find solutions to problems when we get really stuck! If you want people to meet with you (in person) as a mentor you should probably ask on your local Python or Linux users group mailing list. -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
In theory you could hack Python's internal locals or globals dictionary so that it did something unusual while looking up your object. But in practice this doesn't work, because the returned objects (when you call globals() or locals()) attributes are readonly. Probably because those internal lookup dicts are implemented in optimized C not Python, and the C implementation doesn't let you redefine it's internals via the Python interface. David. I'll settle for implementing the __call__() method to return the value as I have no intention to mess around with Python's internal mechanisms. Thanks a lot for your deep insight. -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
If you want people to meet with you (in person) as a mentor you should probably ask on your local Python or Linux users group mailing list. We're not really too worried about doing it in person - mostly because the people doing it so far are all at least 1000 miles away from each other :) Best, Jon -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
On Sun, Jun 22, 2008 at 1:52 PM, Jonathan Roberts [EMAIL PROTECTED] wrote: If you want people to meet with you (in person) as a mentor you should probably ask on your local Python or Linux users group mailing list. We're not really too worried about doing it in person - mostly because the people doing it so far are all at least 1000 miles away from each other :) I'm sure that many (myself included) would be happy to help out, but due to timezone differences, working hours, etc you may only get responses up to 24 hours (or more) later. What needs does your (non-face-to-face) group have that would not be met by posting questions to the Python Tutor list? http://mail.python.org/mailman/listinfo/tutor Perhaps you and your co-learners can sign up to that list, and coordinate with that list's users to use your wiki, messaging services, etc? Personally I learned Python from the Python docs (starting with the tutorial), practice, and Google. Dive Into Python is good too. David. -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
On Jun 22, 5:44 am, Josip [EMAIL PROTECTED] wrote:
I'm trying to limit a value stored by object (either int or float):
class Limited(object):
def __init__(self, value, min, max):
self.min, self.max = min, max
self.n = value
def set_n(self,value):
if value self.min: # boundary check
self.n = self.min
if value self.max:
self.n = self.max
else:
self.n = value
n = property(lambda self : self._value, set_n)
This works,
I bet you didn't even try this, unless your definition of works
includes a RuntimeError: maximum recursion depth exceeded. Here's a
a working version:
class Limited(object):
def __init__(self, value, min, max):
self.min, self.max = min, max
self.n = value
n = property(lambda self : self._value,
lambda self,value:
self.__dict__.__setitem__('_value',
max(self.min, min(value,
self.max
def __int__(self): return int(self._value)
def __float__(self): return float(self._value)
a = Limited(11, 0, 9)
print float(a)
import math
print math.sqrt(a)
except I would like the class to behave like built-in types, so
I can use it like this:
a = Limited(7, 0, 10)
b = math.sin(a)
So that object itself returns it's value (which is stored in a.n). Is this
possible?
For (most) math.* functions it suffices to define __float__, so the
above works. For making it behave (almost) like a regular number,
you'd have to write many more special methods:
http://docs.python.org/ref/numeric-types.html.
Here's a possible start:
import operator
class Limited(object):
def __init__(self, value, min, max):
self.min, self.max = min, max
self.n = value
n = property(lambda self : self._value,
lambda self,value:
self.__dict__.__setitem__('_value',
max(self.min, min(value,
self.max
def __str__(self): return str(self.n)
def __repr__(self): return 'Limited(%r, min=%r, max=%r)' %
(self.n, self.min, self.max)
def __int__(self): return int(self._value)
def __float__(self): return float(self._value)
def __add__(self, other): return self._apply(operator.add, self,
other)
def __sub__(self, other): return self._apply(operator.sub, self,
other)
# a few dozens more methods follow ...
def __radd__(self, other): return self._apply(operator.add, other,
self)
def __rsub__(self, other): return self._apply(operator.sub, other,
self)
# a few dozens more methods follow ...
@classmethod
def _apply(cls, op, first, second):
minmax = None
if isinstance(first, cls):
minmax = first.min,first.max
first = first._value
if isinstance(second, cls):
if minmax is None:
minmax = second.min,second.max
second = second._value
return cls(op(first,second), *minmax)
a = Limited(11, 0, 9)
print a+1
print 1+a
print a-1
print 1-a
Needless to say, this is almost two orders of magnitude slower than
the builtin numbers, so you'd better not use it for any serious number
crunching.
HTH,
George
--
http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python: Code critique please
macoovacany wrote: http://macoovacany.wordpress.com/ When I tried to run it, I got all kinds of syntax errors because of non-ASCII characters; namely, you have fancy left and right single and double quotes. Once I replaced these with the ASCII equivalents, it worked fine. I suggest you use a plain ASCII text editor, like the one that comes with IDLE. HTH, Saul -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
Josip wrote: I'm trying to limit a value stored by object (either int or float): class Limited(object): def __init__(self, value, min, max): self.min, self.max = min, max self.n = value def set_n(self,value): if value self.min: # boundary check self.n = self.min if value self.max: self.n = self.max else: self.n = value n = property(lambda self : self._value, set_n) This works, except I would like the class to behave like built-in types, so I can use it like this: a = Limited(7, 0, 10) b = math.sin(a) So that object itself returns it's value (which is stored in a.n). Is this possible? Why not make it a function? function assignLimited(value, vmin, vmax): value = max(vmin, value) value = min(vmax, value) return value a = assignLimited(7, 0, 10) Seems like it solves your problem relatively cleanly. Note: I also removed min/max variables because they would mask the built-in min/max functions. -Larry -- http://mail.python.org/mailman/listinfo/python-list
Trying to Learn Packages
Hi, I'm making a project into my first package, mainly for organization, but also to learn how to do it. I have a number of data files, both experimental results and PNG files. My project is organized as a root directory, with two subdirectories, src and data, and directory trees below them. I put the root directory in my pythonpath, and I've no trouble accessing the modules, but for the data, I'm giving relative paths, that depend on the current working directory. This has obvious drawbacks, and hard-coding a directory path is worse. Where the data files are numbers, I can simply incorporate them in python scripts that initialize data structures , but what can I do with the image files? What is the usual way of dealing with this? Thanks, Saul -- http://mail.python.org/mailman/listinfo/python-list
pyHook and py2exe
hi every one. I have program which uses this pyHook lib, and when I try to compile it using py2exe the pyhook don't work. it gives me no error. the program works fine beside the function of this lib. why does it append ? is their any solution? I would be glad to know if anyone ever experienced this problem and if he solve it eventually thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: How to convert a into a
On Jun 22, 6:45 am, Tim Roberts [EMAIL PROTECTED] wrote:
dominique [EMAIL PROTECTED] wrote:
On Jun 21, 1:37 pm, John Machin [EMAIL PROTECTED] wrote:
Look at the operator module. In your above example:
return {
'': operator.gt,
'=': operator.eq,
'': operator.lt,
}[variable]
Thanks a lot John
Dominique
Yes, but you need to remember that what you are getting is not literally an
operator. That is, if you store that return value in a variable called
op, you can't say this:
if x op y:
Instead, what you have is a function, so you'll have to write it:
if op( x, y ):
--
Tim Roberts, [EMAIL PROTECTED]
Providenza Boekelheide, Inc.
Thanks for the tip.
Dominique
--
http://mail.python.org/mailman/listinfo/python-list
[PyQt4] QTableWidget non editable
Ciao a tutti, ho un QTableWidget che ho reso non editabile settando editTriggers a NoEditTriggers. Il problema è che adesso non posso selezionare una cela e copiarne il contenuto nella clipboard. Come posso risolvere il problema? Grazie in anticipo antonio -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting column names from a cursor using ODBC module?
The pyodb module doesn't implement this behavior. You would have to create a dictionary of column positions and column names in advance. On Sat, Jun 21, 2008 at 3:52 PM, Chris [EMAIL PROTECTED] wrote: On Jun 21, 3:58 pm, [EMAIL PROTECTED] wrote: Is there any way to retrieve column names from a cursor using the ODBC module? Or must I, in advance, create a dictionary of column position and column names for a particular table before I can access column values by column names? I'd prefer sticking with the ODBC module for now because it comes standard in Python. I'm using Python 2.4 at the moment. Thanks. You should be able to do column_names = [d[0] for d in cursor.description] -- http://mail.python.org/mailman/listinfo/python-list -- | _ | * | _ | | _ | _ | * | | * | * | * | -- http://mail.python.org/mailman/listinfo/python-list
Re: QTableWidget non editable
On 22 Giu, 17:11, Antonio Valentino [EMAIL PROTECTED] wrote: Ciao a tutti, ho un QTableWidget che ho reso non editabile settando editTriggers a NoEditTriggers. Il problema è che adesso non posso selezionare una cela e copiarne il contenuto nella clipboard. Come posso risolvere il problema? Grazie in anticipo antonio Sorry, wrong newsgroup :( bye -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to Learn Packages
On Sun, Jun 22, 2008 at 4:07 PM, Saul Spatz [EMAIL PROTECTED] wrote: Hi, I'm making a project into my first package, mainly for organization, but also to learn how to do it. I have a number of data files, both experimental results and PNG files. My project is organized as a root directory, with two subdirectories, src and data, and directory trees below them. I put the root directory in my pythonpath, and I've no trouble accessing the modules, but for the data, I'm giving relative paths, that depend on the current working directory. This has obvious drawbacks, and hard-coding a directory path is worse. Where the data files are numbers, I can simply incorporate them in python scripts that initialize data structures , but what can I do with the image files? What is the usual way of dealing with this? The usual method (afaik) is to use relative paths, and to not change into the script dirs before running them. eg, instead of: cd src/dir1/dir2/dir3 ./script.py You run it like this: ./src/dir1/dir2/dir3/script.py And then all the scripts under src can load data files using a path like this: './data/datafile' Another method is to use a file-finder func which looks in various places (using PATH, PYHONPATH, etc), and returns the first-found path to the file. -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to Learn Packages
Le Sunday 22 June 2008 16:07:37 Saul Spatz, vous avez écrit : Hi, I'm making a project into my first package, mainly for organization, but also to learn how to do it. I have a number of data files, both experimental results and PNG files. My project is organized as a root directory, with two subdirectories, src and data, and directory trees below them. I put the root directory in my pythonpath, and I've no trouble accessing the modules, but for the data, I'm giving relative paths, that depend on the current working directory. This has obvious drawbacks, and hard-coding a directory path is worse. Where the data files are numbers, I can simply incorporate them in python scripts that initialize data structures , but what can I do with the image files? For a small project you can do the same with images or any kind of data, for instance by serializing your objects with pickle in ascii mode and putting the result in a string constant (well, I never did it and can't guarantee it will work, this is only an example of what people do in many situations) What is the usual way of dealing with this? A more conventional way is to provide a configure script to run before compiling/installing. That script should let the user choose where to install datafiles with a command line option such as --datadir=/path or provide a reasonable default value. Then it will auto-generate some code defining this value as a global variable, to make it accessible to the rest of your own code. Ideally, your app would also provide a command line option or an environment variable to override this hard-coded setting at runtime. But maybe the distutils tools have some features for this, I don't know enough of them to tell that. -- Cédric Lucantis -- http://mail.python.org/mailman/listinfo/python-list
Re: My n00bie brain hurts after Python setup.py install.
John Machin wrote: On Jun 22, 9:05 am, [EMAIL PROTECTED] wrote: I downloaded Mark Pilgrims's feedparser.py in a zipfile to my Windows machine, unzipped it and tried to install it to no avail. Eggs are part of a new experimental package distribution scheme. Don't worry about it. Yes. Eggs are connected to an easy install system which has an annoying tendency to either fail or silently do the wrong thing. They were an attempt to apply the packaging mania of Java to Python. Fortunately, .egg files are actually .zip files, so you can rename them, unpack them, and get at the good parts. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
I'm sure that many (myself included) would be happy to help out, but due to timezone differences, working hours, etc you may only get responses up to 24 hours (or more) later. Awesome, heh I'm sure we'll have questions for the list in good time :) What needs does your (non-face-to-face) group have that would not be met by posting questions to the Python Tutor list? http://mail.python.org/mailman/listinfo/tutor Perhaps you and your co-learners can sign up to that list, and coordinate with that list's users to use your wiki, messaging services, etc? Actually, I hadn't seen that list before but I've just signed up for it and it sounds really interesting! The big difference really is that I'd like to try and build something a little more personal, where we have a group of people who can contact each other in real time and have regular meeting times as well as being able to find each other in between meetings too. I think this kind of consistent relationship is probably quite conducive to learning, and I think others would probably agree :) Personally I learned Python from the Python docs (starting with the tutorial), practice, and Google. Dive Into Python is good too. Yeah, I think we're definitely going to be making use of these resources, and then just using each other as support as we wade through the material and inevitably get stuck in places! Thanks for your help :) Best, Jon -- http://mail.python.org/mailman/listinfo/python-list
Re: Web Crawler - Python or Perl?
On Jun 13, 1:26 am, Chuck Rhode [EMAIL PROTECTED] wrote: On Mon, 09 Jun 2008 10:48:03 -0700, disappearedng wrote: I knowPythonbut notPerl, and I am interested in knowing which of these two are a better choice. I'm partial to *Python*, but, the last time I looked, *urllib2* didn't provide a time-out mechanism that worked under all circumstances. My client-side scripts would usually hang when the server quit responding, which happened a lot. You can avoid the problem using the following code: import socket timeout = 300 # seconds socket.setdefaulttimeout(timeout) regards, Subeen. http://love-python.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
On Jun 22, 3:43 am, Jonathan Roberts [EMAIL PROTECTED] wrote: Hi all, I'm looking to learn Python (as my first programming language) and I'm pretty sure I'd be more successful doing this with a group of other people. hi Jon, I'm in the same situation as you and think a co-op method of learning could be effective and fun. I found the Tutor list that David mentioned a little while ago but also have been looking for a group (without success so far). So count me in! best, George -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
I might be interested in joining your group. I'm trying to learn python, too, but tend to get frustrated by the isolation. can you send me, or post, some details? - O -- http://mail.python.org/mailman/listinfo/python-list
Bind compiled code to name?
If string `source_code` contains Python source code, how can I execute that code, and bind it to some name? I tried compiling with: code_object = compile(source_code, 'errorfile', 'exec') but then what to do with `code_object`? P.S. If my intentions aren't that clear, this is what I'm trying to do. I want to emulate this: import some_module as some_name but with my code in `some_module` string, and not in file. Thanks... -- ___Karlo Lozovina - Mosor | | |.-.-. web: http://www.mosor.net || ICQ#: 10667163 | || _ | _ | Parce mihi domine quia Dalmata sum. |__|_|__||_|_| -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
Why not make it a function? function assignLimited(value, vmin, vmax): value = max(vmin, value) value = min(vmax, value) return value a = assignLimited(7, 0, 10) Seems like it solves your problem relatively cleanly. Note: I also removed min/max variables because they would mask the built-in min/max functions. -Larry Yes, the simple solution is often the best. Still, I'm going for object oriented solution because I want the value and it's limits to be kept together as I'll have many such values with different limits. Storing all the limits in caller namespace is not really an option. -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
Why not make it a function? function assignLimited(value, vmin, vmax): value = max(vmin, value) value = min(vmax, value) return value a = assignLimited(7, 0, 10) Seems like it solves your problem relatively cleanly. Note: I also removed min/max variables because they would mask the built-in min/max functions. -Larry Yes, the simple solution is often the best. Still, I'm going for object oriented solution because I want the value and it's limits to be kept together as I'll have many such values with different limits. Storing all the limits in caller namespace is not really an option. -- http://mail.python.org/mailman/listinfo/python-list
Re: install py2exe in vista
On Saturday 21 June 2008 13:28, Herman wrote: I want to install it in vistahttp://www.daniweb.com/forums/thread130469.htm l#, but i get this message in the process: could not create... py2exe-py2.5 I forwarded your question but you may want to ask again at the link below. [EMAIL PROTECTED] jim-on-linux http://inqvista.com I press 'OK', then.. could not set key value python 2.5 py2exe-0.6.8 I press 'OK' again, then... could not set key value c:\Python25\Removepy2exe.exe -u c:\python25\py2exe-wininst.log The installation goes on and do something, run some postinstall script. I thought it should be ok, but i fail even creating a simple hello word exe. I get this message after i run python setup.py install: running install running build running install_egg_info Writing c:\Python25\Lib\site-packages\UNKNOWN-0.0.0-py2.5-eg g-info No output is created. Can I anyone help me with this? http://www.addthis.com/bookmark.php http://www.daniweb.com/forums/editpost.php?do=editp ostp=631985 -- http://mail.python.org/mailman/listinfo/python-list
-1/2
What is the expected result of -1/2 in python? -- http://mail.python.org/mailman/listinfo/python-list
Re: Bind compiled code to name?
If string `source_code` contains Python source code, how can I execute
that code, and bind it to some name? I tried compiling with:
code_object = compile(source_code, 'errorfile', 'exec')
but then what to do with `code_object`?
P.S.
If my intentions aren't that clear, this is what I'm trying to do. I want
to emulate this:
import some_module as some_name
but with my code in `some_module` string, and not in file.
d = {}
exec source_code in d
some_name = d['some_name']
HTH,
Martin
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Re: pyHook and py2exe
On Sunday 22 June 2008 10:40, Gandalf wrote: hi every one. I have program which uses this pyHook lib, and when I try to compile it using py2exe the pyhook don't work. it gives me no error. the program works fine beside the function of this lib. why does it append ? is their any solution? I would be glad to know if anyone ever experienced this problem and if he solve it eventually I forwarded your question but you may want to ask again at the link below. [EMAIL PROTECTED] jim-on-linux http:\\inqvista.com thanks -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Storing value with limits in object
I bet you didn't even try this, unless your definition of works includes a RuntimeError: maximum recursion depth exceeded. Here's a a working version: Actually, the version I'm using is somewhat bigger. I removed docstrings and recklessly stripped away some methods to make it shorter concise and incorrect. For (most) math.* functions it suffices to define __float__, so the above works. For making it behave (almost) like a regular number, you'd have to write many more special methods: http://docs.python.org/ref/numeric-types.html. Here's a possible start: (...) Yes, this is very close to what I was looking for. It implements all the functionality except asssigning values. And speed is not an issue for my application. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Bind compiled code to name?
Martin v. Löwis [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
d = {}
exec source_code in d
some_name = d['some_name']
This works quite well! I can't believe after googling for half on hour I
didn't notice this exec ... in ... syntax.
One more thing though, is there a way to access some_name as a
attribute, instead as a dictionary:
some_name = d.some_name
?
Thanks...
--
___Karlo Lozovina - Mosor
| | |.-.-. web: http://www.mosor.net || ICQ#: 10667163
| || _ | _ | Parce mihi domine quia Dalmata sum.
|__|_|__||_|_|
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Re: -1/2
Serve Lau wrote: What is the expected result of -1/2 in python? 0 Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: -1/2
Serve Lau wrote: What is the expected result of -1/2 in python? -- http://mail.python.org/mailman/listinfo/python-list From the manual: The result is always rounded towards minus infinity: 1/2 is 0, (-1)/2 is -1, 1/(-2) is -1, and (-1)/(-2) is 0. Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
Re: -1/2
Christian Heimes wrote: Serve Lau wrote: What is the expected result of -1/2 in python? 0 No. That's not right. (It would be in C/C++ and many other languages.) See my other response for the correct answer. Gary Herron Christian -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
pyTTS says, 'SAPI not supported'
I'm running Python 2.3 and calling pyTTS. I've had it working forever. Today, I ran out of disk space. After deleting some of my personal files, for no apparent reason, pyTTS no longer runs. For the statement tts = pyTTS.Create() I get the error message: ValueError: SAPI not supported Can anybody help me? What's going on? -- http://mail.python.org/mailman/listinfo/python-list
binary number format ? format character %b or similar.
I'm was wanting to format a positive integer in binary, and not finding it--to my surprise--I rolled my own version. Is this already in python, or have I missed it somewhere? I have Googled around a bit, and found a few threads on the subject, but they all seem to fizzle out. (e.g. : INPUT 35, OUTPUT 100011 ) -- http://mail.python.org/mailman/listinfo/python-list
Re: An idiom for code generation with exec
[EMAIL PROTECTED] wrote:
On 20 juin, 21:44, eliben [EMAIL PROTECTED] wrote:
...
The generic version has to make a lot of decisions at runtime, based
on the format specification.
Extract the offset from the spec, extract the length.
... example with lists of operations...
Just my 2 cents. Truth is that as long as it works and is
maintainable, then who cares...
To chime in on non-exec operations alternatives. The extraction
piece-by-piece looks like it might be slow. You could figure out
where the majority of endian-ness is (typically it will be all one way),
and treat specially any others (making the string fields with an
operation applied). The best optimizations come from understanding
the regularities in your specific case; seldom do they come from
generating code that hides the regularity and depending on a compiler
to deduce that regularity.
Have you tried something like this (a sketch of a solution)?:
import struct
from functools import partial
import operator
class Decoder(object):
def __init__(self, unpack, processors, finals):
'''Of course this might be simply take the yaml in and go'''
self.unpack = unpack
self.processors = processors
self.length = struct.calcsize(unpack)
self.finals = finals
def packet(self, data):
parts = list(struct.unpack(self.unpack, data))
for n, action, result in self.processors:
if result is None:
parts.append(action(parts[n]))
else:
parts[n] = action(parts[n])
return tuple(parts[n] for n in self.finals) # or NamedTuple ...
def _bits(from_bit, mask, v):
return (v from_bit) mask
Your example extended a bit:
fmt = Decoder('cBiBIi', [(1, partial(operator.mul, 2048), '-'),
(3, partial(_bits, 5, 0x3), None),
(3, partial(operator.iand, 0x80), None),
(3, partial(operator.iand, 0x1F), '-'),
(6, bool, '-')],
[0, 1, 2, 3, 6, 7, 4, 5])
print fmt.packet(source.read(fmt.length))
--Scott David Daniels
[EMAIL PROTECTED]
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Re: Way to unblock sys.stdin.readline() call
On Jun 21, 11:34 pm, Terry Reedy [EMAIL PROTECTED] wrote: joamag wrote: Is there any possible way to unblock the sys.stdin.readline() call from a different thread. If you want the thread to do something 'else' when no input is available, would this work? Put readline in a thread that puts lines in a q=queue.Quese(). Then try: l=q.ge_nowait process l except queue.Empty whatever without l Yes, that would work but still I would have a thread that would block (the one with the readline call). The problem with that solution is that if I try to exit the application, while the thread is waiting in the readline call, that thread would be blocking the exit of the application. That behavior occurs even if the thread is configured in daemon mode. Do you think it’s possible to solve the readline blocking problem in any other way ? -- http://mail.python.org/mailman/listinfo/python-list
Re: binary number format ? format character %b or similar.
I don't know if you found this example: http://www.daniweb.com/code/snippet285.html -- I'm was wanting to format a positive integer in binary, and not finding it--to my surprise--I rolled my own version. Is this already in python, or have I missed it somewhere? I have Googled around a bit, and found a few threads on the subject, but they all seem to fizzle out. (e.g. : INPUT 35, OUTPUT 100011 ) -- http://mail.python.org/mailman/listinfo/python-list
Re: Bind compiled code to name?
d = {}
exec source_code in d
some_name = d['some_name']
This works quite well! I can't believe after googling for half on hour I
didn't notice this exec ... in ... syntax.
One more thing though, is there a way to access some_name as a
attribute, instead as a dictionary:
some_name = d.some_name
Sure:
class D:pass
d = D()
exec source_code in d.__dict__
print d.some_name
Notice that this will also give you d.__builtins__, which you might
want to del afterwards.
Regards,
Martin
--
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Re: Learning Python in a group
I would like to be a part of this if enough people are able to join up, I nabbed python less than two days ago, and have been trying to absorb as much as I can out of websites and practice projects. Learning this together would speed up the process slightly because we could share tips and such, all in all, I'm up for it. -- http://mail.python.org/mailman/listinfo/python-list
ImportError: cannot import name QtCore. using PyInstaller.1-3 and PyQt4 and Python 2.5
Please i need help with this. I just started using python and i hace run into several issues. The on that i can't tackle is the issue of no being able to compile the python code using PyQt4 application It gives the error ImportError: cannot import name QtCore. . I tries the trunk from the snv, but it still gives the same error. I also would like to know. if there are any report generation tool i can use with python similar to crystal reports. I am developing for a windows env. And i come from a visual basic.NET background. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: binary number format ? format character %b or similar.
weheh wrote: I don't know if you found this example: http://www.daniweb.com/code/snippet285.html Thanks for that. The offerings are very similar to the algorithms I wrote myself. It wasn't the solution I was after,really; that's easy. It was whether anything had found its way into the standard library. -- http://mail.python.org/mailman/listinfo/python-list
Regular expression problem
Hello everyone. I'm having a problem when extracting data from HTML with regular expressions. This is the source code: You are ready in the nextbr /span id=counter_jt_minutes style=display: inline;span id=counter_jt_minutes_value12/ spanM/span span id=counter_jt_seconds style=display: inline;span id=counter_jt_seconds_value48/spanS/span And I need to get the remaining time. Until here, isn't a problem getting it, but if the remaining time is less than 60 seconds then the source becomes something like this: You are ready in the nextbr /span id=counter_jt_seconds style=display: inline;span id=counter_jt_seconds_value36/ spanS/span I'm using this regular expression, but the minutes are always None... You are ready in the next.*?(?:(\d+)/spanM/span)?.*?(?:(\d+)/ spanS/span) If I remove the ? from the first group, then it will work, but if there are only seconds it won't work. I could resolve this problem in a couple of python lines, but I really would like to solve it with regular expressions. Thanks, Pedro Abranches -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting column names from a cursor using ODBC module?
Thanks Chris and John. Chris, this worked perfectly with the ODBC module that ships with Python Win32: column_names = [d[0] for d in cursor.description] John, I've never heard of pyodbc but I'll have to look into it. Thanks again. Dana -- http://mail.python.org/mailman/listinfo/python-list
rightclick-copy in IDLE?
when i rightclick in python idle i get set breakpoint or something. n options i dont find a way to change to the normal copy/paste options. -- http://mail.python.org/mailman/listinfo/python-list
listcomprehension, add elements?
[a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))] [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51] i want to add all the elemtns a s well. can i do this all in a listcomprehension? i can do this ofc: reduce(lambda x,y:x+y,[a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))]) but reduce is a functional way of doing it, what is the more pythonic way of doing this? -- http://mail.python.org/mailman/listinfo/python-list
Re: listcomprehension, add elements?
On Jun 22, 6:32 pm, cirfu [EMAIL PROTECTED] wrote: [a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))] [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51] i want to add all the elemtns a s well. can i do this all in a listcomprehension? i can do this ofc: reduce(lambda x,y:x+y,[a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))]) but reduce is a functional way of doing it, what is the more pythonic way of doing this? Nothing that would be more concise than reduce. Anything you did with iteration would just mimic reduce in any case. Jeff Ober artfulcode.net -- http://mail.python.org/mailman/listinfo/python-list
Re: listcomprehension, add elements?
On Jun 23, 10:32 am, cirfu [EMAIL PROTECTED] wrote: [a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))] [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51] i want to add all the elemtns a s well. can i do this all in a listcomprehension? i can do this ofc: reduce(lambda x,y:x+y,[a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))]) but reduce is a functional way of doing it, what is the more pythonic way of doing this? Use the builtin 'sum' function. sum(a + b for a, b in zip(xrange(1, 51), xrange(50, 0, -1))) -- Paul Hankin -- http://mail.python.org/mailman/listinfo/python-list
Re: listcomprehension, add elements?
On Jun 23, 9:23 am, Paul Hankin [EMAIL PROTECTED] wrote: On Jun 23, 10:32 am, cirfu [EMAIL PROTECTED] wrote: [a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))] [51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51, 51] i want to add all the elemtns a s well. can i do this all in a listcomprehension? i can do this ofc: reduce(lambda x,y:x+y,[a+b for a,b in zip(xrange(1,51), xrange(50,0,-1))]) but reduce is a functional way of doing it, what is the more pythonic way of doing this? Use the builtin 'sum' function. sum(a + b for a, b in zip(xrange(1, 51), xrange(50, 0, -1))) Instead of sum(a + b for a, b in zip(foo, bar)) why not use sum(foo) + sum(bar) ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python: Code critique please
On Sun, 22 Jun 2008 08:44:25 -0500, Saul Spatz wrote: macoovacany wrote: http://macoovacany.wordpress.com/ When I tried to run it, I got all kinds of syntax errors because of non-ASCII characters; namely, you have fancy left and right single and double quotes. That's probably WordPress' doing. -- 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0 -- pass it on -- http://mail.python.org/mailman/listinfo/python-list
Re: binary number format ? format character %b or similar.
On Jun 22, 4:07�pm, Ken Starks [EMAIL PROTECTED] wrote: weheh wrote: I don't know if you found this example: http://www.daniweb.com/code/snippet285.html Thanks for that. The offerings are very similar to the algorithms I wrote myself. It wasn't the solution I was after,really; that's easy. It was whether anything had found its way into the standard library. Isn't that coming in Python 3.0? You could also use gmpy, which has a lot of other bit-functionality in addition to displaying them. for i in xrange(8): print 'i:',gmpy.digits(i,2).zfill(8), print '# of 1-bits:',gmpy.popcount(i), print 'find LS 1-bit:',gmpy.scan1(i), print 'bit difference:',gmpy.hamdist(i,2**8-1) i: # of 1-bits: 0 find LS 1-bit: -1 bit difference: 8 i: 0001 # of 1-bits: 1 find LS 1-bit: 0 bit difference: 7 i: 0010 # of 1-bits: 1 find LS 1-bit: 1 bit difference: 7 i: 0011 # of 1-bits: 2 find LS 1-bit: 0 bit difference: 6 i: 0100 # of 1-bits: 1 find LS 1-bit: 2 bit difference: 7 i: 0101 # of 1-bits: 2 find LS 1-bit: 0 bit difference: 6 i: 0110 # of 1-bits: 2 find LS 1-bit: 1 bit difference: 6 i: 0111 # of 1-bits: 3 find LS 1-bit: 0 bit difference: 5 -- http://mail.python.org/mailman/listinfo/python-list
Re: -1/2
On Jun 22, 2:32 pm, Serve Lau [EMAIL PROTECTED] wrote: What is the expected result of -1/2 in python? I would say -1, but it depends on whether the - is a unary minus. -1/2 -1 3 -1/2 3 -- http://mail.python.org/mailman/listinfo/python-list
Re: Fast and easy GUI prototyping with Python
Pete Kirkham wrote: 2008/6/21 Val-Amart [EMAIL PROTECTED]: Use PyQt. You will gain great portability +all the functionality built in qt. You can try PyGTK also, though i wont recommend it. Why would you not recommend it? I've been using it for a mall project, and would like to know if there's some pit waiting for me to fall into. The only pitfall is Mac compatibility. OS X support in GTK is still under development, and much harder to get running than Qt. I guess one other minor thing is that on win32 it's not quite native-looking, but pretty darn close. If Gtk provides everything you need, then there's no reason not to use it. I personally prefer it to Qt, although Qt is quite far ahead of Gtk in many ways (including CSS to style widgets). GTK's licensing is more appropriate for closed-source projects than Qt under the GPL (and cheaper too). -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter canvas drag/drop obstacle
On Fri, 20 Jun 2008 13:41:35 -0300, Guilherme Polo [EMAIL PROTECTED] wrote: On Fri, Jun 20, 2008 at 1:11 PM, Peter Pearson [EMAIL PROTECTED] wrote: Tkinter makes it very easy to drag jpeg images around on a canvas, but I would like to have a target change color when the cursor dragging an image passes over it. I seem to be blocked by the fact that the callbacks that might tell the target that the mouse has entered it (Enter, Any-Enter, even Motion) aren't called if the mouse's button is down. What am I missing? Have I failed to find the right Tkinter document? Is Tkinter the wrong tool for this job? Thanks. I believe the only way to achieve this is binding Motion to the entire canvas, then checking if the x, y coords are inside the target. Ugh. OK, thanks. -- To email me, substitute nowhere-spamcop, invalid-net. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pattern Matching Over Python Lists
On Jun 19, 9:03 pm, John Machin [EMAIL PROTECTED] wrote: On Jun 20, 10:45 am, Chris [EMAIL PROTECTED] wrote: On Jun 17, 1:09 pm, [EMAIL PROTECTED] wrote: Kirk Strauser: Hint: recursion. Your general algorithm will be something like: Another solution is to use a better (different) language, that has built-in pattern matching, or allows to create one. Bye, bearophile Btw, Python's stdlib includes a regular expression library. I'm not sure if you're trolling or simply unaware of it, but I've found it quite adequate for most tasks. Kindly consider a third possibility: bearophile is an experienced Python user, has not to my knowledge exhibited any troll-like behaviour in the past, and given that you seem to be happy using the re module not on strings but on lists of integers, may have been wondering whether *you* were trolling or just plain confused but just too polite to wonder out loud :-) Fair enough. To help you understand the method I used, I'll give you this hint. It's true that regex on works on strings. However, is there any way to convert arbitrarily complex data structures to string representations? You don't need to be an experienced Python user to answer to this ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: Pattern Matching Over Python Lists
Fair enough. To help you understand the method I used, I'll give you this hint. It's true that regex on works on strings. However, is there any way to convert arbitrarily complex data structures to string representations? You don't need to be an experienced Python user to answer to this ;) As Paddy noted before, your solution has a problem, Regexes can't match nested parenthesis, so I think your method will have a problem with nested lists, unless your actual inputs are much simpler than the general case. Eli -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python in a group
You can count me in too.I've been into python for sometime now. I agree that a collaborative learning makes it fun and helps you reach your goal faster. -- http://mail.python.org/mailman/listinfo/python-list
Re: An idiom for code generation with exec
Thanks for all the replies in this post. Just to conclude, I want to
post a piece of code I wrote to encapsulate function creation in this
way:
def create_function(code):
Create and return the function defined in code.
m = re.match('\s*def\s+([a-zA-Z_]\w*)\s*\(', code)
if m:
func_name = m.group(1)
else:
return None
d = {}
exec code.strip() in globals(), d
return d[func_name]
Although the 'def' matching in the beginning looks a bit shoddy at
first, it should work in all cases.
Eli
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Re: Tkinter canvas drag/drop obstacle
On Jun 22, 7:41 pm, Peter Pearson [EMAIL PROTECTED] wrote: On Fri, 20 Jun 2008 13:41:35 -0300, Guilherme Polo [EMAIL PROTECTED] wrote: On Fri, Jun 20, 2008 at 1:11 PM, Peter Pearson [EMAIL PROTECTED] wrote: Tkinter makes it very easy to drag jpeg images around on a canvas, but I would like to have a target change color when the cursor dragging an image passes over it. I seem to be blocked by the fact that the callbacks that might tell the target that the mouse has entered it (Enter, Any-Enter, even Motion) aren't called if the mouse's button is down. What am I missing? Have I failed to find the right Tkinter document? Is Tkinter the wrong tool for this job? Thanks. I believe the only way to achieve this is binding Motion to the entire canvas, then checking if the x, y coords are inside the target. Ugh. OK, thanks. -- To email me, substitute nowhere-spamcop, invalid-net. Yep, but it's not so bad: from Tkinter import * c = Canvas() c.pack() i = c.create_oval(1, 1, 100, 100, fill='green') def cb(e): items = c.find_overlapping( e.x, e.y, e.x + 1, e.y + 1 ) if not items: return print items c.bind(B1-Motion, cb) mainloop() The c.find_overlapping() method returns a tuple. I believe the item ids in the tuple (if any) will be in the same order as the items Z order on the canvas, so items[-1] should always be the topmost graphic item (again, if any.) -- http://mail.python.org/mailman/listinfo/python-list
Re: Bind compiled code to name?
class D:pass
d = D()
exec source_code in d.__dict__
print d.some_name
Notice that this will also give you d.__builtins__, which you might
want to del afterwards.
If you want to mimic an import you can also do this:
import types
D = types.ModuleType('D')
exec source_code in D.__dict__
print D.some_name
This way D is a module (don't know if there are real differences with
the class approach, though)
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Re: Learning Python in a group
On Jun 22, 5:43�am, Jonathan Roberts [EMAIL PROTECTED] wrote: Hi all, I'm looking to learn Python (as my first programming language) and I'm pretty sure I'd be more successful doing this with a group of other people. I've currently got one other person to learn with me, and we plan to work remotely over the net using tools such as IM/VoiP/Gobby/WIkis etc. We'd still like a few others to work with us, with a group of about 5 or 6 being seen as ideal. We'd also like to find somebody to act as a mentor/guide who might be happy to meet with us once every couple of weeks to help keep us moving in the right direction and find solutions to problems when we get really stuck! Wondered if there was anybody here who might be interested in working with us in either of these roles? We both have differing goals, but ultimately we'd just like to get more familiar so that we can provide some simple fixes to packages we maintain/scratch a few itches of our own. Any one is welcome, no matter what your own aim :) Would love to hear feedback, especially from anyone who's interested in working with us... Have you considered creating your own Google Group? Best, Jon -- http://mail.python.org/mailman/listinfo/python-list
POP3_SSL Error
Hi, While using poplib to fetch mails from my gmail account, I am getting the following error: Exception is POP3_SSL instance has no attribute 'sslobj' Can anyone tell me what this error means. Thanks and Regards Roopesh -- http://mail.python.org/mailman/listinfo/python-list
Re: rightclick-copy in IDLE?
when i rightclick in python idle i get set breakpoint or something. n options i dont find a way to change to the normal copy/paste options. Under Preferences ... menu you'll find Keys tab, there you can change the keys bindings to whatever you want. HTH, -- Miki [EMAIL PROTECTED] http://pythonwise.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to Learn Packages
Cédric Lucantis wrote: Le Sunday 22 June 2008 16:07:37 Saul Spatz, vous avez écrit : Hi, I'm making a project into my first package, mainly for organization, but also to learn how to do it. I have a number of data files, both experimental results and PNG files. My project is organized as a root directory, with two subdirectories, src and data, and directory trees below them. I put the root directory in my pythonpath, and I've no trouble accessing the modules, but for the data, I'm giving relative paths, that depend on the current working directory. This has obvious drawbacks, and hard-coding a directory path is worse. Where the data files are numbers, I can simply incorporate them in python scripts that initialize data structures , but what can I do with the image files? For a small project you can do the same with images or any kind of data, for instance by serializing your objects with pickle in ascii mode and putting the result in a string constant (well, I never did it and can't guarantee it will work, this is only an example of what people do in many situations) What is the usual way of dealing with this? A more conventional way is to provide a configure script to run before compiling/installing. That script should let the user choose where to install datafiles with a command line option such as --datadir=/path or provide a reasonable default value. Then it will auto-generate some code defining this value as a global variable, to make it accessible to the rest of your own code. Ideally, your app would also provide a command line option or an environment variable to override this hard-coded setting at runtime. But maybe the distutils tools have some features for this, I don't know enough of them to tell that. A couple of good ideas here. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
[issue3112] implement PEP 3134 exception reporting
Adam Olsen [EMAIL PROTECTED] added the comment: * cause/context cycles should be avoided. Naive traceback printing could become confused, and I can't think of any accidental way to provoke it (besides the problem mentioned here.) * I suspect PyErr_Display handled string exceptions in 2.x, and this is an artifact of that * No opinion on PyErr_DisplaySingle * PyErr_Display is used by PyErr_Print, and it must end up with no active exception. Additionally, third party code may depend on this semantic. Maybe PyErr_DisplayEx? * +1 on standardizing tracebacks -- nosy: +Rhamphoryncus ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3167] math test fails on Solaris 10
Mark Dickinson [EMAIL PROTECTED] added the comment: I'll take a look. -- assignee: - marketdickinson nosy: +marketdickinson ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3167 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3168] cmath test fails on Solaris 10
Changes by Mark Dickinson [EMAIL PROTECTED]: -- assignee: - marketdickinson nosy: +marketdickinson ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3168 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3167] math test fails on Solaris 10
Mark Dickinson [EMAIL PROTECTED] added the comment:
Could you tell me what
import math
math.log(float('-inf'))
gives instead of the expected ValueError?
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[issue2722] os.getcwd fails for long path names on linux
Facundo Batista [EMAIL PROTECTED] added the comment: Went for the malloc only patch. Just fixed a small detail (weird corner case if malloc returned NULL first time, res will be unassigned). The test could be better (no necessity of using a recursive function, it could be done with a while), but it works. Commited in r64452. -- nosy: +facundobatista resolution: - fixed status: open - closed ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue2722 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2732] curses.textpad loses characters at the end of lines
A.M. Kuchling [EMAIL PROTECTED] added the comment: This bug was fixed in 2.5 and 2.6, in rev. 60118 and 60119. Thanks for your bug report! -- assignee: - akuchling nosy: +akuchling resolution: - fixed status: open - closed ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue2732 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 07:04 +, Adam Olsen a écrit : Adam Olsen [EMAIL PROTECTED] added the comment: * cause/context cycles should be avoided. Naive traceback printing could become confused, and I can't think of any accidental way to provoke it (besides the problem mentioned here.) You mean they should be detected when the exception is set? I was afraid that it may make exception raising slower. Reporting is not performance sensitive in comparison to exception raising. (the problem mentioned here is already avoided in the patch, but the detection of other cycles is deferred to exception reporting for the reason given above) * PyErr_Display is used by PyErr_Print, and it must end up with no active exception. Additionally, third party code may depend on this semantic. Maybe PyErr_DisplayEx? I was not proposing to change the exception swallowing semantics, just to add a return value indicating if any errors had occurred while displaying the exception. ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3165] cPickle recursion problem
Facundo Batista [EMAIL PROTECTED] added the comment: What is this fixing? Could you please provide a test cases that fails without this patch? Thank you!! -- nosy: +facundobatista ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3165 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1974] email.MIMEText.MIMEText.as_string incorrectly folding long subject header
Chris Withers [EMAIL PROTECTED] added the comment: Andi, I'm in total agreement with you :-) (so if this bug could get fixed, both issues could get closed) ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue1974 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Adam Olsen [EMAIL PROTECTED] added the comment: On Sun, Jun 22, 2008 at 8:07 AM, Antoine Pitrou [EMAIL PROTECTED] wrote: You mean they should be detected when the exception is set? I was afraid that it may make exception raising slower. Reporting is not performance sensitive in comparison to exception raising. (the problem mentioned here is already avoided in the patch, but the detection of other cycles is deferred to exception reporting for the reason given above) I meant only that trivial cycles should be detected. However, I hadn't read your patch, so I didn't realize you already knew of a way to create a non-trivial cycle. This has placed a niggling doubt in my mind about chaining the exceptions, rather than the tracebacks. Hrm. * PyErr_Display is used by PyErr_Print, and it must end up with no active exception. Additionally, third party code may depend on this semantic. Maybe PyErr_DisplayEx? I was not proposing to change the exception swallowing semantics, just to add a return value indicating if any errors had occurred while displaying the exception. Ahh, harmless then, but to what benefit? Wouldn't the traceback module be better suited to any possible error reporting? ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3085] chapter 17.1.3.5 'Replacing os.popen*' in the Python library reference contains an error
Georg Brandl [EMAIL PROTECTED] added the comment: Fixed in r64461. Thanks! -- resolution: - fixed ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3085 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3157] sqlite3 minor documentation issues
Georg Brandl [EMAIL PROTECTED] added the comment: I fixed the docstring in r64463 (2.5 branch, already fixed in trunk) and expanded the connect() docstring in r64464. -- resolution: - fixed status: open - closed ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3157 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3085] chapter 17.1.3.5 'Replacing os.popen*' in the Python library reference contains an error
Manuel Kaufmann [EMAIL PROTECTED] added the comment: This bug was reported on Python 2.5 version and was applied on 2.6 branch. That's correct? ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3085 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3146] Sphinx/LaTeX fails on Python 3.0b1 documentation
Georg Brandl [EMAIL PROTECTED] added the comment: Thanks, should be fixed with Sphinx r64465. -- resolution: - fixed status: open - closed ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3146 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3085] chapter 17.1.3.5 'Replacing os.popen*' in the Python library reference contains an error
Georg Brandl [EMAIL PROTECTED] added the comment: I don't maintain the 2.5 docs anymore, at least for such minor bugs. ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3085 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Adam Olsen [EMAIL PROTECTED] added the comment: On Sun, Jun 22, 2008 at 1:04 PM, Antoine Pitrou [EMAIL PROTECTED] wrote: Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 17:17 +, Adam Olsen a écrit : I meant only that trivial cycles should be detected. However, I hadn't read your patch, so I didn't realize you already knew of a way to create a non-trivial cycle. This has placed a niggling doubt in my mind about chaining the exceptions, rather than the tracebacks. Hrm. Chaining the tracebacks rather than the exceptions loses important information: what is the nature of the exception which is the cause or context of the current exception? I assumed each leg of the traceback would reference the relevant exception. Although.. this is effectively the same as creating a new exception instance when reraised, rather than modifying the old one. Reusing the old is done for performance I believe. It is improbable to create such a cycle involuntarily, it means you raise an old exception in replacement of a newer one caused by the older, which I think is quite contorted. It is also quite easy to avoid creating the cycle, simply by re-raising outside of any except handler. I'm not convinced. try: ... # Lookup except A as a: # Lookup failed try: ... # Fallback except B as b: # Fallback failed raise a # The original exception is of the type we want For this behaviour, this is the most natural way to write it. Conceptually, there shouldn't be a cycle - the traceback should be the lookup, then the fallback, then whatever code is about this - exactly the order the code executed in. ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1523853] 2.4.2 file.read caches EOF state
Facundo Batista [EMAIL PROTECTED] added the comment: In Linux, it seems to be the behaviour of the underlying C function 'fread'. Do you think it's ok to add the following line in the read() documentation? As this function depends of the underlying C function :cfunc:`fread`, inheritates its behaviour in details like caching EOF and others. Assigning this to George, to reword that in nicer English and apply. Regards, -- assignee: - georg.brandl nosy: +facundobatista, georg.brandl ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue1523853 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 19:23 +, Adam Olsen a écrit : For this behaviour, this is the most natural way to write it. Conceptually, there shouldn't be a cycle I agree your example is not far-fetched. How about avoiding cycles for implicit chaining, and letting users shoot themselves in the foot with explicit recursive chaining if they want? Detection would be cheap enough, just a simple loop without any memory allocation. the traceback should be the lookup, then the fallback, then whatever code is about this - exactly the order the code executed in. It would be the reverse: first the fallback, then the re-raised exception. The last caught exception is always reported last, because it's supposed to be the main or highest-level one. ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Adam Olsen [EMAIL PROTECTED] added the comment: On Sun, Jun 22, 2008 at 1:48 PM, Antoine Pitrou [EMAIL PROTECTED] wrote: Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 19:23 +, Adam Olsen a écrit : For this behaviour, this is the most natural way to write it. Conceptually, there shouldn't be a cycle I agree your example is not far-fetched. How about avoiding cycles for implicit chaining, and letting users shoot themselves in the foot with explicit recursive chaining if they want? Detection would be cheap enough, just a simple loop without any memory allocation. That's still O(n). I'm not so easily convinced it's cheap enough. And for that matter, I'm not convinced it's correct. The inner exception's context becomes clobbered when we modify the outer exception's traceback. The inner's context should reference the traceback as it was at that point. This would all be a lot easier if reraising always created a new exception. Can you think of a way to skip that only when we can be sure its safe? Maybe as simple as counting the references to it? ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 19:57 +, Adam Olsen a écrit : That's still O(n). I'm not so easily convinced it's cheap enough. O(n) when n will almost never be greater than 5 (and very often equal to 1 or 2), and when the unit is the cost of a pointer dereference plus the cost of a pointer comparison, still sounds cheap. We could bench it anyway. And for that matter, I'm not convinced it's correct. The inner exception's context becomes clobbered when we modify the outer exception's traceback. The inner's context should reference the traceback as it was at that point. Yes, I've just thought about that, it's a bit annoying... We have to decide what is more annoying: that, or a reference cycle that can delay deallocation of stuff attached to an exception (including local variables attached to the tracebacks)? (just a small note: it's exception objects that are chained, not tracebacks... we never modify tracebacks at any point) This would all be a lot easier if reraising always created a new exception. How do you duplicate an instance of an user-defined exception? Using an equivalent of copy.deepcopy()? It will probably end up much more expensive than the above-mentioned O(n) search. Can you think of a way to skip that only when we can be sure its safe? Maybe as simple as counting the references to it? I don't think so, the exception can be referenced in an unknown number of local variables (themselves potentially referenced by tracebacks). ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Adam Olsen [EMAIL PROTECTED] added the comment: On Sun, Jun 22, 2008 at 2:20 PM, Antoine Pitrou [EMAIL PROTECTED] wrote: Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 19:57 +, Adam Olsen a écrit : That's still O(n). I'm not so easily convinced it's cheap enough. O(n) when n will almost never be greater than 5 (and very often equal to 1 or 2), and when the unit is the cost of a pointer dereference plus the cost of a pointer comparison, still sounds cheap. We could bench it anyway. Indeed. And for that matter, I'm not convinced it's correct. The inner exception's context becomes clobbered when we modify the outer exception's traceback. The inner's context should reference the traceback as it was at that point. Yes, I've just thought about that, it's a bit annoying... We have to decide what is more annoying: that, or a reference cycle that can delay deallocation of stuff attached to an exception (including local variables attached to the tracebacks)? The cycle is only created by broken behaviour. The more I think about it, the more I want to fix it (by not reusing the exception). This would all be a lot easier if reraising always created a new exception. How do you duplicate an instance of an user-defined exception? Using an equivalent of copy.deepcopy()? It will probably end up much more expensive than the above-mentioned O(n) search. Passing in e.args is probably sufficient. All this would need to be discussed on python-dev (or python-3000?) though. Can you think of a way to skip that only when we can be sure its safe? Maybe as simple as counting the references to it? I don't think so, the exception can be referenced in an unknown number of local variables (themselves potentially referenced by tracebacks). Can be, or will be? Only the most common behaviour needs to be optimized. ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3112] implement PEP 3134 exception reporting
Antoine Pitrou [EMAIL PROTECTED] added the comment: Le dimanche 22 juin 2008 à 20:40 +, Adam Olsen a écrit : How do you duplicate an instance of an user-defined exception? Using an equivalent of copy.deepcopy()? It will probably end up much more expensive than the above-mentioned O(n) search. Passing in e.args is probably sufficient. I think it's very optimistic :-) Some exception objects can hold dynamic state which is simply not stored in the args tuple. See Twisted's Failure objects for an extreme example: http://twistedmatrix.com/trac/browser/trunk/twisted/python/failure.py (yes, it is used an an exception: see raise self in the trap() method) Can be, or will be? Only the most common behaviour needs to be optimized. Well, the most common behaviour is a very short context chain, which is already optimized by my reference-avoidance proposal... ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue3112 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1567948] poplib.py list interface
Facundo Batista [EMAIL PROTECTED] added the comment: Hasan, are you still interested in this or wants to drop this request? Passing almost two years without comments it's no good if you'll be the package maintainer. Thanks! -- nosy: +facundobatista ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue1567948 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue678464] Docs don't define sequence-ness very well
Facundo Batista [EMAIL PROTECTED] added the comment: Skip, don't you think it's better to raise this kind of generic question in the python-dev list? This should probably lay down here for ever before a discussion raises to decide this. -- nosy: +facundobatista ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue678464 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue701743] Reloading pseudo modules
Facundo Batista [EMAIL PROTECTED] added the comment: Walter, the import mechanisms changed by a big rework from Brett Cannon in the last months. Do you think still have a use case that should be fulfilled? Do you want to update your patch? Thank you! -- nosy: +facundobatista ___ Python tracker [EMAIL PROTECTED] http://bugs.python.org/issue701743 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3051] heapq change breaking compatibility
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[issue3069] Let set.union and set.intersection accept multiple arguments
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