Re: PEPs should be included with the documentation download
Chris Angelico ros...@gmail.com writes: Hence the question: How many people actually do use the downloaded docs? Maybe it'd turn out to be quite high, but it's not an unreasonable question. I think it's an unreasonable question. What would you accept as an answer? Who could possibly be autoritative at estimating such a number? How would you choose between competing authorities and estimates? It should be sufficient to realise that the reality of internet infrastructure in most countries makes it preferable – at least some of the time, for some significant, even if small, number of users – to read the documentation on local storage instead of on the internet. -- \“I took a course in speed waiting. Now I can wait an hour in | `\ only ten minutes.” —Steven Wright | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Chris Angelico wrote: On Fri, Aug 23, 2013 at 1:26 AM, Ian Simcock ian.simc...@internode.on.net wrote: Chris Angelico wrote: A lot of programs, when their output is not going to the console, will buffer output. It's more efficient for many purposes. With Unix utilities, there's often a parameter like --pipe or --unbuffered that says please produce output line by line, but Windows ping doesn't have that - and so I'm seeing the same thing you are. You should be able to see the time delay in dir by looking for some particular directory name, and searching from the root directory. Unless you're on a BLAZINGLY fast drive, that'll take Windows a good while! ChrisA I tried it again with the dir command and, while my drive is pretty fast, it does look like it works. I've done come looking around and found that the standard C libraries apparently automatically buffer output when the output is being redirected to a file handle unless specifically told not to. I did a further test and created a unique file name in the root of my D drive and then use dir to search the entire drive for that name. In the command window the name appears instantly and then after a slight pause the command prompt reappears. When run from python however the pause comes first and then the name appears and then the command prompt returns. So yep, seems like I'm screwed :-) Thanks for your help with this. At least now I know it's not that I'm doing something wrong. Ian Simcock. -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Rob Wolfe wrote: Ian Simcock ian.simc...@internode.on.net writes: When file object is used in a for loop it works like an iterator and then it uses a hidden read-ahead buffer. It might cause this kind of blocking. You can read more details here (description of method ``next``): http://docs.python.org/lib/bltin-file-objects.html So basically non-blocking loop might look like this: while True: line = p.stdout.readline() if not line: break print line HTH, Rob Thanks, but some further research seems to indicate that the problem is that the standard C libraries are probably buffering the output when the it's being redirected, so the problem is coming from the command line tool rather than the python code. Ian Simcock. -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic Python Query
Am 23.08.2013 05:28, schrieb Steven D'Aprano: On Thu, 22 Aug 2013 13:54:14 +0200, Ulrich Eckhardt wrote: When the Python object goes away, it doesn't necessarily affect thethread or file it represents. That's certainly not true with file objects. When the file object goes out of scope, the underlying low-level file is closed. Ahem, yes, but no: Calling close(fd) is not the same as destroying the file, I'm pretty sure it's still on my harddisk after that. That is also the difference to strings, where the Python object really is all there is to it. Similarly you can only customize the Python side of things with derivation, the other side will remain the same, apart from the data you write to the file or the code you run in the thread. Steven, thank you for taking the time to read and consider what I wrote, it is appreciated! Uli -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
On Thu, 22 Aug 2013 18:08:14 -0700 (PDT), tausc...@gmail.com wrote: On Thursday, August 22, 2013 3:26:17 AM UTC-5, Phil Thompson wrote: It looks like you aren't using a layout to arrange your widgets. Explicitly specifying geometries is a bad idea. Phil Thanks.QT Designer uses set geometry ...only because you have told it to... and I'm totally lost as how to implement it. I've tried using a layout on the central widget. I've tried specifically referencing the Ui_MainWindow in the window.py ui file... You need to read up on how to use layouts in Designer. The generated .py file will then do what you want automatically. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: PEPs should be included with the documentation download
In article 7wvc2xkjvz@benfinney.id.au, Ben Finney ben+pyt...@benfinney.id.au wrote: Chris Angelico ros...@gmail.com writes: Hence the question: How many people actually do use the downloaded docs? Maybe it'd turn out to be quite high, but it's not an unreasonable question. I think it's an unreasonable question. What would you accept as an answer? Who could possibly be autoritative at estimating such a number? How would you choose between competing authorities and estimates? It should be sufficient to realise that the reality of internet infrastructure in most countries makes it preferable – at least some of the time, for some significant, even if small, number of users – to read the documentation on local storage instead of on the internet. In any case if you want to see this happen, someone needs to open an issue and make a case for it on the Python bug tracker. -- Ned Deily, n...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Sergei Ivachev
Maybe someone from the Python community tried to run Python (with a possible set of standard library modules) under the Google Native Client in browser? If you have a positive experience, can share? -- http://mail.python.org/mailman/listinfo/python-list
Who run the Python for Google Native Client?
Maybe someone from the Python community tried to run Python (with a possible set of standard library modules) under the Google Native Client in browser? If you have a positive experience, can share? -- http://mail.python.org/mailman/listinfo/python-list
Re: PEPs should be included with the documentation download
Ned Deily n...@acm.org writes: In article 7wvc2xkjvz@benfinney.id.au, Ben Finney ben+pyt...@benfinney.id.au wrote: Chris Angelico ros...@gmail.com writes: Hence the question: How many people actually do use the downloaded docs? Maybe it'd turn out to be quite high, but it's not an unreasonable question. I think it's an unreasonable question [in this context]. In any case if you want to see this happen, someone needs to open an issue and make a case for it on the Python bug tracker. Neither Chris nor I are proposing to have PEPs in the installed documentation :-) You might want to respond directly to the original post with that suggestion. -- \ “Men never do evil so completely and cheerfully as when they do | `\it from religious conviction.” —Blaise Pascal (1623–1662), | _o__) Pensées, #894. | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Ian Simcock wrote: When I use this code I can see that the Popen works, any code between the Popen and the for will run straight away, but as soon as it gets to the for and tries to read p.stdout the code blocks until the command line program completes, then all of the lines are returned. Does anyone know how to get the results of the program without it blocking? I have tried your code with ping google.com as command and got the same results; apparently something buffers the output. The result is different when using Python 3.3: there, the lines are printed as they come in. This seems to indicate a bug in the Python 2.7 implementation. There are some bug reports on bugs.python.org that may be related; see for example: http://bugs.python.org/issue15532 I have been playing around a bit with the suggested approach of using the io library directly. I managed to get unbuffered output, but unfortunately the program hangs when the subprocess is done. It can't even be terminated with Control-C, I have to use task manager to kill python.exe. Below is as far as I got; perhaps someone with more experience with pipes knows how to fix this. Regards, Gertjan. #!/usr/bin/env python2.7 # coding: CP1252 from __future__ import print_function import subprocess import io, os def main(): i, o = os.pipe() piperead = io.open(i, 'rb', buffering=1) p = subprocess.Popen([ping, google.com], stdout=o, stderr=subprocess.PIPE, bufsize=0, shell=False) for line in piperead: print(line) if __name__ == '__main__': main() -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Op 22-08-13 07:51, Ian Simcock schreef: Greetings all. I'm using Python 2.7 under Windows and am trying to run a command line program and process the programs output as it is running. A number of web searches have indicated that the following code would work. import subprocess p = subprocess.Popen(D:\Python\Python27\Scripts\pip.exe list -o, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1, universal_newlines=True, shell=False) for line in p.stdout: print line When I use this code I can see that the Popen works, any code between the Popen and the for will run straight away, but as soon as it gets to the for and tries to read p.stdout the code blocks until the command line program completes, then all of the lines are returned. Does anyone know how to get the results of the program without it blocking? Maybe the following can work? Untested code: from pty import openpty from subprocess import Popen master, slave = openpty() p = Popen(D:\Python\Python27\Scripts\pip.exe list -o, stdout = slave, stderr = slave, stdin = slave, close_fds = True) for line in master: print line The idea is to set a a pseudo terminal for pip so that the system thinks pip is doing IO with a terminal and so the IO will be line buffered. But all IO from pip will be available through the master in your program. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Op 23-08-13 11:53, Antoon Pardon schreef: Op 22-08-13 07:51, Ian Simcock schreef: Greetings all. I'm using Python 2.7 under Windows and am trying to run a command line program and process the programs output as it is running. A number of web searches have indicated that the following code would work. import subprocess p = subprocess.Popen(D:\Python\Python27\Scripts\pip.exe list -o, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1, universal_newlines=True, shell=False) for line in p.stdout: print line When I use this code I can see that the Popen works, any code between the Popen and the for will run straight away, but as soon as it gets to the for and tries to read p.stdout the code blocks until the command line program completes, then all of the lines are returned. Does anyone know how to get the results of the program without it blocking? Maybe the following can work? Never mind. I had overlooked that using pty requires linux and you are using windows. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
RE: Running a command line program and reading the result as it runs
I'm using Python 2.7 under Windows and am trying to run a command line program and process the programs output as it is running. A number of web searches have indicated that the following code would work. import subprocess p = subprocess.Popen(D:\Python\Python27\Scripts\pip.exe list -o, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1, universal_newlines=True, shell=False) for line in p.stdout: print line When I use this code I can see that the Popen works, any code between the Popen and the for will run straight away, but as soon as it gets to the for and tries to read p.stdout the code blocks until the command line program completes, then all of the lines are returned. Does anyone know how to get the results of the program without it blocking? Try this: p = subprocess.Popen(args, stdout=subprocess.PIPE) for line in p.stdout: print(line) p.wait() jlc -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Ian Simcock wrote: Greetings all. I'm using Python 2.7 under Windows and am trying to run a command line program and process the programs output as it is running. A number of web searches have indicated that the following code would work. import subprocess p = subprocess.Popen(D:\Python\Python27\Scripts\pip.exe list -o, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1, universal_newlines=True, shell=False) for line in p.stdout: print line When I use this code I can see that the Popen works, any code between the Popen and the for will run straight away, but as soon as it gets to the for and tries to read p.stdout the code blocks until the command line program completes, then all of the lines are returned. Does anyone know how to get the results of the program without it blocking? The following works on my linux system: import subprocess p = subprocess.Popen( [ping, google.com], stdout=subprocess.PIPE) instream = iter(p.stdout.readline, ) for line in instream: print line.rstrip() I don't have Windows available to test, but if it works there, too, the problem is the internal buffer used by Python's implementation of file iteration rather than the OS. -- http://mail.python.org/mailman/listinfo/python-list
Python variable as a string
Sorry this is a very basic question. I have a list *var* which after some evaluation I need to refer to *var* as a string. Pseudocode: var = ['a', 'b' , 'c' , 'd'] adict = dict(var='string', anothervar='anotherstring') anotherdict = dict() if condition: anotherdict[akey] = adict['var'] Basically im evaluating the list *var*, and if true, i want to use *var* as a string so that i can refer to a key-value pair in *adict *(whose key name is also var for convenience). * * Or maybe i should do things differently? Any help and code will be appreciated! -- http://mail.python.org/mailman/listinfo/python-list
What does sys.stdout.flush() do?
Somewhere i read.. sys.stdout.flush(): Flush on a file object pushes out all the data that has been buffered to that point. Can someone post here a script example with sys.stdout.flush(), where in case i commented that i could understand what the difference really would be? Whenever i try to remove that line (in scripts that i find online), i cant find any differences. I've just noticed that it is usually called right after sys.stdout.write(..) thx -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
Peter Otten wrote: The following works on my linux system: import subprocess p = subprocess.Popen( [ping, google.com], stdout=subprocess.PIPE) instream = iter(p.stdout.readline, ) for line in instream: print line.rstrip() I don't have Windows available to test, but if it works there, too, the problem is the internal buffer used by Python's implementation of file iteration rather than the OS. Excellent, that works on Windows as well. That conclusively proves that the buffering problem is in Python, not in the command that is executed. (Although that may happen, too, for some commends.) Regards, Gertjan. -- http://mail.python.org/mailman/listinfo/python-list
Re: What does sys.stdout.flush() do?
D. Xenakis wrote: Somewhere i read.. sys.stdout.flush(): Flush on a file object pushes out all the data that has been buffered to that point. Can someone post here a script example with sys.stdout.flush(), where in case i commented that i could understand what the difference really would be? Whenever i try to remove that line (in scripts that i find online), i cant find any differences. I've just noticed that it is usually called right after sys.stdout.write(..) thx Use time.sleep() to see the effects of (line) buffering. Type the following in your interactive interpreter and be enlightened ;) import sys, time for i in range(10): ... print i, ... time.sleep(.1) ... 0 1 2 3 4 5 6 7 8 9 for i in range(10): ... print i, ... sys.stdout.flush() ... time.sleep(.1) ... 0 1 2 3 4 5 6 7 8 9 -- http://mail.python.org/mailman/listinfo/python-list
How to send broadcast IP address to network?
I want to send a broadcast packet to all the computers connected to my home router. The following 2 lines of code do not work; host=192.168.0.102 s.connect((host, port)) Can someone advise? Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to send broadcast IP address to network?
Some typo mistake. Should be host=192.168.0.255, not 192.168.0.102 On Friday, August 23, 2013 8:32:10 PM UTC+8, light...@gmail.com wrote: I want to send a broadcast packet to all the computers connected to my home router. The following 2 lines of code do not work; host=192.168.0.102 s.connect((host, port)) Can someone advise? Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
I tried that this morning and it destroyed my form. So, right now, that's probably not what I'm looking for. But, if you look at that picture, the app isn't resized to 800x600 like it says in the ui file. The pixmaps aren't on the buttons like I set them up in the ui file. It's not using the ui file at all. So, what's the point of making a QT Designer file at all if it doesn't use it? I'm guessing it CAN use it and there is just something I'm missing. You may be right and I may not want to set the geometry in qt designer down the road. But, right now I do and not only is it not getting that from the ui fileit's not getting anything at all...even though I added all the lines I thought I needed to. If I decide to actually change the gui later, I'd like to be able to use QT Designer to do so...design a layout and not really have to change my program. As it stands, it's totally ignoring my ui file and I have to redo all the work in the program. In which case, there's no point to using qt designer at all. I know I have to be missing something though there has to be a way to use the work qt designer did. Thanks On Aug 23, 2013 2:39 AM, Phil Thompson p...@riverbankcomputing.com wrote: On Thu, 22 Aug 2013 18:08:14 -0700 (PDT), tausc...@gmail.com wrote: On Thursday, August 22, 2013 3:26:17 AM UTC-5, Phil Thompson wrote: It looks like you aren't using a layout to arrange your widgets. Explicitly specifying geometries is a bad idea. Phil Thanks.QT Designer uses set geometry ...only because you have told it to... and I'm totally lost as how to implement it. I've tried using a layout on the central widget. I've tried specifically referencing the Ui_MainWindow in the window.py ui file... You need to read up on how to use layouts in Designer. The generated .py file will then do what you want automatically. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: How to send broadcast IP address to network?
On 2013-08-23, lightai...@gmail.com lightai...@gmail.com wrote: The following 2 lines of code do not work; host=192.168.0.255 host=192.168.0.102 s.connect((host, port)) Traceback (most recent call last): File stdin, line 1, in module NameError: name 's' is not defined I bet that's not the same traceback you get. Furthermore, port isn't defined either. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: PEPs should be included with the documentation download
On 2013-08-23, Chris Angelico ros...@gmail.com wrote: I'm aware of that. However, I'm also aware that many people still read things online, even with a less-than-reliable internet connection. Hence the question: How many people actually do use the downloaded docs? Maybe it'd turn out to be quite high, but it's not an unreasonable question. I use the compiled html/windows help and the integrated with the interpreter html version of the Python docs, both downloaded and installed for easy access. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: Python variable as a string
On 2013-08-23, Jake Angulo jake.ang...@gmail.com wrote: I have a list *var* which after some evaluation I need to refer to *var* as a string. You must make a str version of var. Pseudocode: var = ['a', 'b' , 'c' , 'd'] adict = dict(var='string', anothervar='anotherstring') anotherdict = dict() if condition: anotherdict[akey] = adict['var'] anotherdict[akey] = adict[str(var)] Will actually work, though you might prefer: anotherdict[akey] = adict[''.join(var)] Try them out and see. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: Python variable as a string
On Fri, 23 Aug 2013 21:40:06 +1000, Jake Angulo wrote:
Sorry this is a very basic question.
Not so much basic as confusing.
I have a list *var* which after some evaluation I need to refer to *var*
as a string.
Pseudocode:
var = ['a', 'b' , 'c' , 'd']
adict = dict(var='string', anothervar='anotherstring')
This creates a dict with two keys, var and anothervar. If you print
it, you will get this:
{'var': 'string', 'anothervar': 'anotherstring'}
Is that what you intended? If not, what did you intend?
anotherdict = dict()
if condition:
anotherdict[akey] = adict['var']
I don't understand what this code has to do with your question. Your
explanation below doesn't seem to have anything to do with the code you
show here. You don't evaluate the list var, or test it in a truth
context. Apart from wrapping condition in angle brackets, for no reason I
understand, the above is perfectly fine Python code (except, of course,
condition and akey are undefined).
Basically im evaluating the list *var*, and if true, i want to use *var*
as a string so that i can refer to a key-value pair in *adict *(whose
key name is also var for convenience).
I don't understand what you are trying to accomplish, but I have two
guesses. If you want a string var, just type var in quotation marks,
like you do above.
If you want to use the *contents* of variable var as a string, just call
the str() function on it:
py alist = ['a', 'b' , 'c' , 'd']
py key = str(alist)
py adict={}
py adict[key] = whatever you like
py adict
{['a', 'b', 'c', 'd']: 'whatever you like'}
Or if you prefer:
py {key: whatever}
{['a', 'b', 'c', 'd']: 'whatever'}
If you want something else, you'll need to explain more carefully what
you want.
Or maybe i should do things differently?
Possibly. What sort of things did you have in mind? :-)
--
Steven
--
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Re: Running a command line program and reading the result as it runs
On 2013-08-22, Chris Angelico ros...@gmail.com wrote: On Fri, Aug 23, 2013 at 1:26 AM, Ian Simcock ian.simc...@internode.on.net wrote: Chris Angelico wrote: Is the program actually producing output progressively? I just tried your exact code with dir /ad /s /b and it worked fine, producing output while the dir was still spinning (obviously setting shell=True to make that work, but I don't think that'll make a difference). It may be that pip buffers its output. Is there a parameter to pip to make it pipe-compatible? ChrisA If I run pip in the command window I can see it's output appearing line by line rather than on one block. I tried the code with the dir command but it's too fast for me to be sure if it's working or not. I tried again using the command ping google.com instead since I know that output's slowly and it something that everyone should have. In the command window I can see that the output appears over time, but from python I get nothing for a while and then suddenly get all the output in one rapid go. Can you think of anything else I can look at? A lot of programs, when their output is not going to the console, will buffer output. It's more efficient for many purposes. With Unix utilities, there's often a parameter like --pipe or --unbuffered that says please produce output line by line, but Windows ping doesn't have that - and so I'm seeing the same thing you are. Another way this problem can be avoided on Unix is to connect the slave end of a pty (instead of a pipe) to the command's stdout/stderr and then read the command's output from the master end of the pty. [On Unix, the buffering decision is based on whether stdout is a tty device, not on whether it's the console.] Dunno whether Windows has ptys or not. They're a very simple, elegent solution to a number of problems, so I'm guessing not. ;) -- Grant Edwards grant.b.edwardsYow! ... the MYSTERIANS are at in here with my CORDUROY gmail.comSOAP DISH!! -- http://mail.python.org/mailman/listinfo/python-list
Re: What does sys.stdout.flush() do?
In c34119f1-3e04-419d-8dd9-07dd4c648...@googlegroups.com D. Xenakis gouzouna...@hotmail.com writes: Can someone post here a script example with sys.stdout.flush(), where in case i commented that i could understand what the difference really would be? Depending what sys.stdout is connected to (a file, the screen, a pipe, etc.), data doesn't necessarily get written right away. In particular, screen output often waits until it receives a newline before displaying anything. flush() makes sure it all gets written *right now*. -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent?
On Thursday, August 22, 2013 5:00:38 PM UTC-5, Bitswapper wrote:
On Thursday, August 22, 2013 4:26:24 PM UTC-5, Prasad, Ramit wrote:
Bitswapper wrote:
So I have a parent and child class:
class Map(object):
def __init__(self, name=''):
self.mapName = name
self.rules = {}
class Rule(Map):
def __init__(self, number):
Map.__init__(self)
self.number = number
This means that rules will never have a name. I think you need
def __init__(self, name='', number=None):
Map.__init__(self, name)
self.number = number
def __repr__(self):
return Map + self.mapName + rule number + str(self.number)
if __name__ == __main__:
map = Map(thismap)
rule = Rule(1)
map.rules[rule.number] = rule
with the above:
$ python -i inherit.py
map
__main__.Map object at 0xb7e889ec
map.rules
{1: Map rule number 1}
map.rules[1]
Map rule number 1
I have tried adding:
map.rules[2] = Rule(2)
but that still gets:
$ python -i inherit.py
map.rules
{1: Map rule number 1, 2: Map rule number 2}
and:
map.rule = Rule(3)
which also doesn't really get me what I'm looking for:
map.rules
{1: Map rule number 1, 2: Map rule number 2}
map.rule
Map rule number 3
It seems to me what I'm trying to do is link an arbitrary child instance
to an arbitrary instance of a
parent class, which in this case would be handy Because I'd like to
populate a map with rules and
print the rules including the parent map name for each rule. I'm just
not sure how I would go about
doing this in python.
Any thoughts are welcome, and thanks in advance
I not sure what you mean by the above. Can you provide an example of what
you want to occur and the output for it?
I was thinking of:
map = Map('myMap')
map.rules[1] = Rule(1)
map.rules[2] = Rule(2)
print map.rules[1]
Map myMap rule number 1
print map.rules[2]
Map myMap rule number 2
map.mapName = newname
print map.rules[1]
Map newname rule number 1
print map.rules[2]
Map newname rule number 2
Or rather:
map = Map('myMap')
map.rules[1] = Rule(1)
map.rules[2] = Rule(2)
print map.rules[1]
Map myMap rule number 1
print map.rules[2]
Map myMap rule number 2
map.mapName = newname
print map.rules[1]
Map newname rule number 1
print map.rules[2]
Map newname rule number 2
--
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Re: How to send broadcast IP address to network?
On Fri, Aug 23, 2013 at 10:32 PM, lightai...@gmail.com wrote: I want to send a broadcast packet to all the computers connected to my home router. The following 2 lines of code do not work; host=192.168.0.102 s.connect((host, port)) Can someone advise? You can't establish a TCP socket with a broadcast address. That just doesn't work. Can you please show a whole lot more context so we can see what's happening here? Thanks! ChrisA -- http://mail.python.org/mailman/listinfo/python-list
python interface to iMacros
Python help, I am running iMacros from linux/firefox and doing most of what I want. But, there are times when I want to do something of the net and then back to the iMacros script. Are there any projects out there that will connect python to imacros, something on the order of pexpect? There is a commercial version available for $400.00 If I could justify the cost, I would probably pay it. jimonlinux inqvista.com -- http://mail.python.org/mailman/listinfo/python-list
How to add additional font face to Python 3.3.2 IDLE?
How can I add for example Droid Sans Mono to python 3.3.2 IDLE? I'm not very familliar with font faces, really. Thank's! -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic Python Query
On Fri, Aug 23, 2013 at 5:12 PM, Ulrich Eckhardt ulrich.eckha...@dominolaser.com wrote: Am 23.08.2013 05:28, schrieb Steven D'Aprano: On Thu, 22 Aug 2013 13:54:14 +0200, Ulrich Eckhardt wrote: When the Python object goes away, it doesn't necessarily affect thethread or file it represents. That's certainly not true with file objects. When the file object goes out of scope, the underlying low-level file is closed. Ahem, yes, but no: Calling close(fd) is not the same as destroying the file, I'm pretty sure it's still on my harddisk after that. That is also the difference to strings, where the Python object really is all there is to it. Similarly you can only customize the Python side of things with derivation, the other side will remain the same, apart from the data you write to the file or the code you run in the thread. The file object doesn't represent the file on the disk; it represents the open file, which is a thing that you can have a handle (file descriptor) to. That thing is indeed destroyed when the file object is __del__'d, though it's possible to dispose of it sooner than that: f = open(test,w) with f: f.write(Hello, world!) 13 f _io.TextIOWrapper name='test' mode='w' encoding='cp1252' f has been closed at this point, and if I now go to open it in another application, Python won't hold any locks; but the object still exists. However, the general expectation is that the file object and the open-file in the OS will correspond. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: right adjusted strings containing umlauts
Am 08.08.2013 18:37, schrieb Chris Angelico:
On Thu, Aug 8, 2013 at 5:16 PM, Kurt Mueller
kurt.alfred.muel...@gmail.com wrote:
Am 08.08.2013 17:44, schrieb Peter Otten:
Kurt Mueller wrote:
What do I do, when input_strings/output_list has other codings like
iso-8859-1?
You have to know the actual encoding. With that information it's easy:
output_list
['\xc3\xb6', '\xc3\xbc', 'i', 's', 'f']
encoding = utf-8
output_list = [s.decode(encoding) for s in output_list]
print output_list
[u'\xf6', u'\xfc', u'i', u's', u'f']
How do I get to know the actual encoding?
I read from stdin. There can be different encondings.
Usually utf8 but also iso-8859-1/latin9 are to be expected.
But sys.stdin.encoding sais always 'None'.
If you can switch to Python 3, life becomes a LOT easier. The Python 3
input() function (which does the same job as raw_input() from Python
2) returns a Unicode string, meaning that it takes care of encodings
for you.
Because I cannot switch to Python 3 for now my life is not so easy:-)
For some text manipulation tasks I need a template to split lines
from stdin into a list of strings the way shlex.split() does it.
The encoding of the input can vary.
For further processing in Python I need the list of strings to be in unicode.
Here is template.py:
##
#!/usr/bin/env python
# vim: set fileencoding=utf-8 :
# split lines from stdin into a list of unicode strings
# Muk 2013-08-23
# Python 2.7.3
from __future__ import print_function
import sys
import shlex
import chardet
bool_cmnt = True # shlex: skip comments
bool_posx = True # shlex: posix mode (strings in quotes)
for inpt_line in sys.stdin:
print( 'inpt_line=' + repr( inpt_line ) )
enco_type = chardet.detect( inpt_line )[ 'encoding' ] #
{'encoding': 'EUC-JP', 'confidence': 0.99}
print( 'enco_type=' + repr( enco_type ) )
try:
strg_inpt = shlex.split( inpt_line, bool_cmnt, bool_posx, ) # shlex
does not work on unicode
except Exception, errr: # usually
'No closing quotation'
print( error='%s' on inpt_line='%s' % ( errr, inpt_line.rstrip(), ),
file=sys.stderr, )
continue
print( 'strg_inpt=' + repr( strg_inpt ) ) # list of
strings
strg_unic = [ strg.decode( enco_type ) for strg in strg_inpt ] # decode
the strings into unicode
print( 'strg_unic=' + repr( strg_unic ) ) # list of
unicode strings
##
$ cat some-file | template.py
Comments are welcome.
TIA
--
Kurt Mueller
--
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Re: Running a command line program and reading the result as it runs
On Fri, Aug 23, 2013, at 7:14, Peter Otten wrote: The following works on my linux system: instream = iter(p.stdout.readline, ) for line in instream: print line.rstrip() I don't have Windows available to test, but if it works there, too, the problem is the internal buffer used by Python's implementation of file iteration rather than the OS. I can confirm this on Windows. Doesn't this surprising difference between for line in iter(f.readline,'') vs for line in f violate TOOWTDI? We're led to believe from the documentation that iterating over a file does _not_ read lines into memory before returning them. It's not clear to me what performance benefit can be gained from waiting when there is no more data available, either. I don't understand how it's even happening - from looking at the code, it looks like next() just calls readline() once, no fancy buffering specific to itself. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python variable as a string
2013/8/23 Jake Angulo jake.ang...@gmail.com: Sorry this is a very basic question. I have a list var which after some evaluation I need to refer to var as a string. Pseudocode: var = ['a', 'b' , 'c' , 'd'] adict = dict(var='string', anothervar='anotherstring') anotherdict = dict() if condition: anotherdict[akey] = adict['var'] Basically im evaluating the list var, and if true, i want to use var as a string so that i can refer to a key-value pair in adict (whose key name is also var for convenience). Or maybe i should do things differently? Any help and code will be appreciated! -- http://mail.python.org/mailman/listinfo/python-list Hi, if I understand correctly, you would like to achieve something like the following [fictional shell session]: var = a string variable named 'var' some_magic_function(var) 'var' is it the case? I believe, it is not (easily and reliably) possible, and especially it doesn't seem to be of any real use, I can think of. cf. e.g. the discussion http://stackoverflow.com/questions/2553354/how-to-get-a-variable-name-as-a-string-in-python What is your use case, where you can't use the actual object reference, but only the string? What name string should be retrieved in case of multiple names referencing the same object? hth, vbr -- http://mail.python.org/mailman/listinfo/python-list
Re: Python and mysql 3 tier programming
System Debian Wheezy Linux Python 2.7 Mysql 5.5.31 Apache Server I am somewhat conversant with html, css, SQL, mysql, Apache and Debian Linux. Actually I have been using Debian for over 10 year. I spent over 5 year, prior to retirement, programming database based applications in Foxpro. I can also struggle through Java Script. I am just starting to use python. I've started with development of a rather complicated document archiving system with about 5 different levels of users and over 100 years of documents. photos, etc. The database setup has gone smoothly and other than one trial web page I'm leaving that for later. Finally to the problem. Where does python start and mysql stored procedures stop and visa versa. I'm trying to stick to a 3 tier philosophy but am having trouble figuring out where the dividing line is between the two packages. Further python seems to like cursor tables a lot and Oracles Mysql 5.5 discourages their use. Are they talking about the same thing. My problem is mostly with the basic architecture of the system. I think I will be able to figure out the code. Also, any comments on the use of the Django framework for this project. Hello Gary, Is your primary goal to write code or is it to have available to you a document archiving solution? If the latter, you will probably save time by using an existing system (e.g., Google Docs). If the former, I have a few thoughts. One, you should probably be using Python 3 rather than 2, I think the command is sudo aptitude install python3. Two, I think of stored procedures as being good at manipulating data really fast. With a document management system most activity will be retrieval rather than manipulation. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to add additional font face to Python 3.3.2 IDLE?
On 8/23/2013 11:49 AM, maildrago...@gmail.com wrote: How can I add for example Droid Sans Mono to python 3.3.2 IDLE? I'm not very familliar with font faces, really. I suspect that Idle just looks in the standard font directory of your system to make the list of available fonts that it displays in the Options dialog. So I think that you just need to 'install' the font, whatever than means for your OS. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a command line program and reading the result as it runs
random...@fastmail.us wrote: On Fri, Aug 23, 2013, at 7:14, Peter Otten wrote: The following works on my linux system: instream = iter(p.stdout.readline, ) for line in instream: print line.rstrip() I don't have Windows available to test, but if it works there, too, the problem is the internal buffer used by Python's implementation of file iteration rather than the OS. I can confirm this on Windows. Doesn't this surprising difference between for line in iter(f.readline,'') vs for line in f violate TOOWTDI? We're led to believe from the documentation that iterating over a file does _not_ read lines into memory before returning them. It's not clear to me what performance benefit can be gained from waiting when there is no more data available, either. I don't understand how it's even happening - from looking at the code, it looks like next() just calls readline() once, no fancy buffering specific to itself. Maybe you are looking in the wrong version? For 2.x you can use the file_iternext() function as a starting point, see: http://hg.python.org/cpython/file/1ea833ecaf5a/Objects/fileobject.c#l2316 Python 3 uses a different approach that allows you to mix iteration and readline(): $ python -c 'f = open(tmp.txt); next(f); f.readline()' Traceback (most recent call last): File string, line 1, in module ValueError: Mixing iteration and read methods would lose data $ python3 -c 'f = open(tmp.txt); next(f); f.readline()' The relevant code is likely in the Modules/_io/ directory. There is also [New I/O] http://www.python.org/dev/peps/pep-3116/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
On Fri, 23 Aug 2013 08:00:29 -0500, Michael Staggs tausc...@gmail.com wrote: I tried that this morning and it destroyed my form. So, right now, that's probably not what I'm looking for. But, if you look at that picture, the app isn't resized to 800x600 like it says in the ui file. The pixmaps aren't on the buttons like I set them up in the ui file. It's not using the ui file at all. So, what's the point of making a QT Designer file at all if it doesn't use it? pyuic4 uses it to generate the corresponding Python code. Any time you change the .ui file with Designer you have to run pyuic4 again. You should not modify the Python code that pyuic4 generates. I'm guessing it CAN use it and there is just something I'm missing. You may be right and I may not want to set the geometry in qt designer down the road. But, right now I do and not only is it not getting that from the ui fileit's not getting anything at all...even though I added all the lines I thought I needed to. If I decide to actually change the gui later, I'd like to be able to use QT Designer to do so...design a layout and not really have to change my program. As it stands, it's totally ignoring my ui file and I have to redo all the work in the program. In which case, there's no point to using qt designer at all. I know I have to be missing something though there has to be a way to use the work qt designer did. I strongly suggest you do some more reading about using Designer. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Right. I know that if I redesign it I have to run pyuic4 again and that I shouldn't change that file...let qt designer do its job. But, that's exactly what I'm having the problem with...incorporating the file pyuic4 gave me... and why I posted here. If you can point me towards something I need to read then by all means... I'd be grateful. But, all the little tutorials I've found told me to do it this way and obviously my program has no access to itit's not resizing the window or doing anything the ui file states. So, I do know I'm doing something wrong and doing something the little tutorials didn't account for. So, I'm asking here. Again, I'm just learning. I took the codecademy python course and started trying to learn to build a media player...and haven't figured out how to build the gui yet. If you or anyone else can point me to something that would explain what I'm doing wrong, I'll read it from front to back. If it's too advanced it will lose mebut I would like to learn to do this. On Aug 23, 2013 12:17 PM, Phil Thompson p...@riverbankcomputing.com wrote: On Fri, 23 Aug 2013 08:00:29 -0500, Michael Staggs tausc...@gmail.com wrote: I tried that this morning and it destroyed my form. So, right now, that's probably not what I'm looking for. But, if you look at that picture, the app isn't resized to 800x600 like it says in the ui file. The pixmaps aren't on the buttons like I set them up in the ui file. It's not using the ui file at all. So, what's the point of making a QT Designer file at all if it doesn't use it? pyuic4 uses it to generate the corresponding Python code. Any time you change the .ui file with Designer you have to run pyuic4 again. You should not modify the Python code that pyuic4 generates. I'm guessing it CAN use it and there is just something I'm missing. You may be right and I may not want to set the geometry in qt designer down the road. But, right now I do and not only is it not getting that from the ui fileit's not getting anything at all...even though I added all the lines I thought I needed to. If I decide to actually change the gui later, I'd like to be able to use QT Designer to do so...design a layout and not really have to change my program. As it stands, it's totally ignoring my ui file and I have to redo all the work in the program. In which case, there's no point to using qt designer at all. I know I have to be missing something though there has to be a way to use the work qt designer did. I strongly suggest you do some more reading about using Designer. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
On Fri, 23 Aug 2013 12:30:41 -0500, Michael Staggs tausc...@gmail.com wrote: Right. I know that if I redesign it I have to run pyuic4 again and that I shouldn't change that file...let qt designer do its job. But, that's exactly what I'm having the problem with...incorporating the file pyuic4 gave me... and why I posted here. If you can point me towards something I need to read then by all means... I'd be grateful. But, all the little tutorials I've found told me to do it this way and obviously my program has no access to itit's not resizing the window or doing anything the ui file states. So, I do know I'm doing something wrong and doing something the little tutorials didn't account for. So, I'm asking here. Again, I'm just learning. I took the codecademy python course and started trying to learn to build a media player...and haven't figured out how to build the gui yet. If you or anyone else can point me to something that would explain what I'm doing wrong, I'll read it from front to back. If it's too advanced it will lose mebut I would like to learn to do this. http://qt-project.org/doc/qt-4.8/designer-manual.html Designer has a preview option that creates your UI on the fly. The first step would be to get it working as far as you can with that before you try generating any Python code. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Thanks for the manual. I will look into it but all the examples are probably c++. Ive tried zetcode and some of the other tutorials. That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png The problem isn't that I can't design it in QT Designer. It is designed just like I want it. The problem is, when I try to follow zetcode and other tutorials about how to import and use my form as designed by qt designer and run through pyuic4 it doesn't seem to even notice my ui file...and certainly isnt acting on it. I posted my code above where I was trying anything just to get it to use that ui I designed in qt designer.so far to no avail -- Forwarded message -- From: Michael Staggs tausc...@gmail.com Date: Aug 23, 2013 12:54 PM Subject: Re: Using PyQT with QT Designer To: Phil Thompson p...@riverbankcomputing.com Cc: Thanks for the manual. I will look into it but all the examples are probably c++. Ive tried zetcode and some of the other tutorials. That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png The problem isn't that I can't design it in QT Designer. It is designed just like I want it. The problem is, when I try to follow zetcode and other tutorials about how to import and use my form as designed by qt designer and run through pyuic4 it doesn't seem to even notice my ui file...and certainly isnt acting on it. I posted my code above where I was trying anything just to get it to use that ui I designed in qt designer.so far to no avail On Aug 23, 2013 12:42 PM, Phil Thompson p...@riverbankcomputing.com wrote: On Fri, 23 Aug 2013 12:30:41 -0500, Michael Staggs tausc...@gmail.com wrote: Right. I know that if I redesign it I have to run pyuic4 again and that I shouldn't change that file...let qt designer do its job. But, that's exactly what I'm having the problem with...incorporating the file pyuic4 gave me... and why I posted here. If you can point me towards something I need to read then by all means... I'd be grateful. But, all the little tutorials I've found told me to do it this way and obviously my program has no access to itit's not resizing the window or doing anything the ui file states. So, I do know I'm doing something wrong and doing something the little tutorials didn't account for. So, I'm asking here. Again, I'm just learning. I took the codecademy python course and started trying to learn to build a media player...and haven't figured out how to build the gui yet. If you or anyone else can point me to something that would explain what I'm doing wrong, I'll read it from front to back. If it's too advanced it will lose mebut I would like to learn to do this. http://qt-project.org/doc/qt-4.8/designer-manual.html Designer has a preview option that creates your UI on the fly. The first step would be to get it working as far as you can with that before you try generating any Python code. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Again thoughI'm finished with QT Designer. I have the finished product I want exactly like I want it. But, as ive shown in the screenshots, I'm doing exactly what ive seen in zetcode and other tutorials but It doesn't seem to incorporate and act upon that ui file. The first thing you notice is that it doesn't resize the main window to 800x600...which is one of the first lines in the ui file. I know whatever I'm doing wrong has to be a 1 or 2 line solution...just something I should change a littlebut I dont know what that is On Aug 23, 2013 12:42 PM, Phil Thompson p...@riverbankcomputing.com wrote: On Fri, 23 Aug 2013 12:30:41 -0500, Michael Staggs tausc...@gmail.com wrote: Right. I know that if I redesign it I have to run pyuic4 again and that I shouldn't change that file...let qt designer do its job. But, that's exactly what I'm having the problem with...incorporating the file pyuic4 gave me... and why I posted here. If you can point me towards something I need to read then by all means... I'd be grateful. But, all the little tutorials I've found told me to do it this way and obviously my program has no access to itit's not resizing the window or doing anything the ui file states. So, I do know I'm doing something wrong and doing something the little tutorials didn't account for. So, I'm asking here. Again, I'm just learning. I took the codecademy python course and started trying to learn to build a media player...and haven't figured out how to build the gui yet. If you or anyone else can point me to something that would explain what I'm doing wrong, I'll read it from front to back. If it's too advanced it will lose mebut I would like to learn to do this. http://qt-project.org/doc/qt-4.8/designer-manual.html Designer has a preview option that creates your UI on the fly. The first step would be to get it working as far as you can with that before you try generating any Python code. Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Can a child access parent attributes if that child added post-hoc as an attribute to the parent?
On Thursday, August 22, 2013 4:59:17 PM UTC-5, Ian wrote:
On Thu, Aug 22, 2013 at 3:26 PM, Prasad, Ramit
wrote:
Bitswapper wrote:
So I have a parent and child class:
class Map(object):
def __init__(self, name=''):
self.mapName = name
self.rules = {}
class Rule(Map):
def __init__(self, number):
Map.__init__(self)
self.number = number
This means that rules will never have a name. I think you need
def __init__(self, name='', number=None):
Map.__init__(self, name)
self.number = number
No, that's still wrong. The OP talks abut maps having names, not
rules having names. Unless a Rule is-a Map, which sounds unlikely,
Rule should not be inheriting from Map in the first place.
It seems to me what I'm trying to do is link an arbitrary child instance
to an arbitrary instance of a
parent class, which in this case would be handy Because I'd like to
populate a map with rules and
print the rules including the parent map name for each rule. I'm just not
sure how I would go about
doing this in python.
You'll need to keep a reference to the Map on each Rule instance. So
instead of self.mapName you'll have self.map.mapName. Your Rule class
should probably look something like this:
class Rule(object):
def __init__(self, map, number):
self.map = map
self.number = number
And then when you construct it you'll need to tell it what map it belongs to:
rule = Rule(map, 1)
Actually yea, that makes sense. I was looking for a way for a child to
'automagically' inherit parent instance-specific data via inheritance only by
virtue of being a child of a parent instance. What you're suggesting makes
more sense.
Thanks!
--
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Arpex Capital seleciona: Desenvolvedor Python / SP
Arpex Capital seleciona para uma de suas empresas: Desenvolvedor Python Objetivo geral da Posição: Desenvolver software estável e de primeira linha, que será incorporado à plataforma de WiFi mais moderna atualmente. Responsabilidades: escrever software que rodará tanto no backend (Python) quanto no frontend (HTML5). Pré-requisitos: - Conhecimento em Python, MongoDB - Cloud computing, BigData - Pensamento lógico e analítico - Capacidade de absorver tecnologias novas de forma constante Deveres: - Escrever software sólido em Python Formação: Irrelevante (não cobramos) Local de Trabalho: São Paulo/SP A empresa oferece remuneração compatível com o mercado + Benefícios. Os interessados deverão enviar o CV para kgar...@arpexcapital.com.br , mencionando no assunto Desenvolvedor Python. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Michael Staggs wrote: That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png The problem isn't that I can't design it in QT Designer. It is designed just like I want it. The problem is, when I try to follow zetcode and other tutorials about how to import and use my form as designed by qt designer and run through pyuic4 it doesn't seem to even notice my ui file...and certainly isnt acting on it. I don't know PyQT, so I've kept quiet so far... You don't say what the name of the generated file is, but perhaps since the source file was window.ui, the generated one is window.py My guess is that when you do the from window import Ui_MainWindow it is finding some OTHER window.py file. Have you tried simply adding an illegal line to the generated file, to force the compiler to fail the import? Once you're sure that it is importing this particular file, you can remove such a line. Could be that you have some other window.py file (or window.pyc, or whatever) and that it's finding that one. Or it's finding some older version of this one. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: How to add additional font face to Python 3.3.2 IDLE?
23 август 2013, петък, 19:33:41 UTC+3, Terry Reedy написа: On 8/23/2013 11:49 AM, maildrago...@gmail.com wrote: How can I add for example Droid Sans Mono to python 3.3.2 IDLE? I'm not very familliar with font faces, really. I suspect that Idle just looks in the standard font directory of your system to make the list of available fonts that it displays in the Options dialog. So I think that you just need to 'install' the font, whatever than means for your OS. -- Terry Jan Reedy I searched a little on that topic and i found that this is actualy what the IDLE is doing. Thanks Terry Jan ! -- http://mail.python.org/mailman/listinfo/python-list
can't get utf8 / unicode strings from embedded python
note everything works great if i use Ascii, but:
in my utf8-encoded script i have this:
print frøânçïé
in my embedded C++ i have this:
PyObject* CPython_Script::print(PyObject *args)
{
PyObject*resultObjP = NULL;
const char *utf8_strZ = NULL;
if (PyArg_ParseTuple(args, s, utf8_strZ)) {
Log(utf8_strZ, false);
resultObjP = Py_None;
Py_INCREF(resultObjP);
}
return resultObjP;
}
Now, i know that my Log() can print utf8 (has for years, very well debugged)
but what it *actually* prints is this:
print frøânçïé
-- frøânçïé
another method i use looks like this:
kj_commands.menu(控件, 同步滑帧, 全局无滑帧)
or
kj_commands.menu(u控件, u同步滑帧, u全局无滑帧)
and in my C++ i have:
SuperString ScPyObject::GetAs_String()
{
SuperString str;
if (PyUnicode_Check(i_objP)) {
#if 1
// method 1
{
ScPyObject
utf8Str(PyUnicode_AsUTF8String(i_objP));
str = utf8Str.GetAs_String();
}
#elif 0
// method 2
{
UTF8Char*uniZ = (UTF8Char
*)PyUnicode_AS_UNICODE(i_objP);
str.assign(uniZ[0],
uniZ[PyUnicode_GET_DATA_SIZE(i_objP)], kCFStringEncodingUTF16);
}
#else
// method 3
{
UTF32VeccharVec(32768);
CF_ASSERT(sizeof(UTF32Vec::value_type) == sizeof(wchar_t));
PyUnicodeObject *uniObjP = (PyUnicodeObject
*)(i_objP);
Py_ssize_t
sizeL(PyUnicode_AsWideChar(uniObjP, (wchar_t *)charVec[0], charVec.size()));
charVec.resize(sizeL);
charVec.push_back(0);
str.Set(SuperString(charVec[0]));
}
#endif
} else {
str.Set(uc(PyString_AsString(i_objP)));
}
Log(str.utf8Z());
return str;
}
for the string, 控件, i get:
-- 控件
for the *unicode* string, u控件, Methods 1, 2, and 3, i get the same thing:
-- 控件
okay so what am i doing wrong???
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Setting the value of True
Python allows you set the value of True True = 1.3 Now this is consistent with the decision to let you set the value of various builtin names. But why is this case different: None = 1.3 File stdin, line 1 SyntaxError: cannot assign to None Mark Gawron -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Thank you. I just deleted all of them, reran pyuic4 on window.ui and regenerated window.py just to make sure. Unfortunately, I get the same problem. I've got the GUI perfectly designed just like I want it in window.py... just can't figure out how to use it in my program. On Friday, August 23, 2013 3:16:59 PM UTC-5, Dave Angel wrote: Michael Staggs wrote: That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png The problem isn't that I can't design it in QT Designer. It is designed just like I want it. The problem is, when I try to follow zetcode and other tutorials about how to import and use my form as designed by qt designer and run through pyuic4 it doesn't seem to even notice my ui file...and certainly isnt acting on it. I don't know PyQT, so I've kept quiet so far... You don't say what the name of the generated file is, but perhaps since the source file was window.ui, the generated one is window.py My guess is that when you do the from window import Ui_MainWindow it is finding some OTHER window.py file. Have you tried simply adding an illegal line to the generated file, to force the compiler to fail the import? Once you're sure that it is importing this particular file, you can remove such a line. Could be that you have some other window.py file (or window.pyc, or whatever) and that it's finding that one. Or it's finding some older version of this one. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting the value of True
On 08/23/2013 04:38 PM, jeangaw...@gmail.com wrote: Python allows you set the value of True True = 1.3 Now this is consistent with the decision to let you set the value of various builtin names. But why is this case different: None = 1.3 File stdin, line 1 SyntaxError: cannot assign to None Mark Gawron Python3 fixes this inconsistency, by disallowing all such assignments. They all raise an exception: SyntaxError: assignment to keyword -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting the value of True
On 8/23/2013 7:38 PM, jeangaw...@gmail.com wrote: Python allows you set the value of True Unqualified 'Python', used in the present tense, refers to the latest release or repository version. True = 1.3 SyntaxError: assignment to keyword True = 1.3 Now this is consistent with the decision to let you set the value of various builtin names. But why is this case different: None = 1.3 File stdin, line 1 SyntaxError: cannot assign to None -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png That's not a preview. That's just the regular design view. (you can tell by the little dots in the background) You need to go to Form - Preview... to see the actual preview. That said... 1.) You may want to ask your question on the PyQt mailing list. Though you are talking with the undisputed PyQt expert in Phil, there are more people on the other list who are familiar with PyQt and who may be willing to look more closely at your specific code. 2.) It may be that the examples you are looking at are not sufficient to help you with the situation you are in. For instance, I've written several programs using Designer and PyQt and I would recommend against using the pyuic method. When I first started with PyQt I also used pyuic and eventually I found the PyQt4.uic method works better for me. 3.) Layouts. You have to use them with Qt or you're going to have a bad time. Looking at your design, I would do something like ... - select the two buttons on the left and click Lay Out Vertically - select the two large white boxes and click Lay Out Vertically - put a vertical spacer underneath the red X button - select the red button and the spacer and click Lay Out Vertically - at this point you may need to resize and rearrange your three vertical layouts so that they don't overlap and are in approximately the positions that you want, then - select the main window and click Lay Out Horizontally Something along those lines would get you about to where you want to be. The form may not look _exactly_ the way you have it there, but it will be a more flexible design and nothing will be overlapping. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using PyQT with QT Designer
Thank you... I found my problem class MainWindow(QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent) self.setupUi(self) That seems to take care of it... if I comment out everything else, I get my pristine form I don't know if it's the super call or the setupuibut one of those was my godsend. So, that is solved... I just have to figure out how to put things in the gui where I want thembut I think you're right at any rate. If I try to resize, it doesn't function like I thought it would. I will have to use layouts.. but at least now I am able to use the UI file that I created. On Friday, August 23, 2013 7:35:53 PM UTC-5, Lee Harr wrote: That's the problem though. It is exactly how I want it in designer. It's perfect as it is in designer when I preview it. Here is a screenshot of the preview: http://i.imgur.com/ULRolq8.png That's not a preview. That's just the regular design view. (you can tell by the little dots in the background) You need to go to Form - Preview... to see the actual preview. That said... 1.) You may want to ask your question on the PyQt mailing list. Though you are talking with the undisputed PyQt expert in Phil, there are more people on the other list who are familiar with PyQt and who may be willing to look more closely at your specific code. 2.) It may be that the examples you are looking at are not sufficient to help you with the situation you are in. For instance, I've written several programs using Designer and PyQt and I would recommend against using the pyuic method. When I first started with PyQt I also used pyuic and eventually I found the PyQt4.uic method works better for me. 3.) Layouts. You have to use them with Qt or you're going to have a bad time. Looking at your design, I would do something like ... - select the two buttons on the left and click Lay Out Vertically - select the two large white boxes and click Lay Out Vertically - put a vertical spacer underneath the red X button - select the red button and the spacer and click Lay Out Vertically - at this point you may need to resize and rearrange your three vertical layouts so that they don't overlap and are in approximately the positions that you want, then - select the main window and click Lay Out Horizontally Something along those lines would get you about to where you want to be. The form may not look _exactly_ the way you have it there, but it will be a more flexible design and nothing will be overlapping. -- http://mail.python.org/mailman/listinfo/python-list
Re: Setting the value of True
On Fri, 23 Aug 2013 16:38:43 -0700, jeangawron wrote: Python allows you set the value of True True = 1.3 Only in older versions of Python. This is for historical reasons: True and False were added as built-ins relatively late in Python's history (2.2, I think) and so there is still old code that legitimately does this at the start of a module: True = 1 False = not True Hence, making True and False actual keywords could only occur in Python 3, which was allowed to break backwards compatibility. None, on the other hand, has always existed in Python. The very oldest versions way back in the mists of time allowed you to rebind None: [steve@ando ~]$ python1.5 Python 1.5.2 (#1, Aug 27 2012, 09:09:18) [GCC 4.1.2 20080704 (Red Hat 4.1.2-52)] on linux2 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam None = 3 None 3 but as that was considered a mistake, *and* it was considered unlikely to be any code in the wild that legitimately rebinds None, that was made a SyntaxError in Python 2.x. As for why None, True and False are treated differently than built-ins, if I remember the reason why, it is because they are considered fundamental to the inner workings of Python, unlike mere builtins like len, map, etc. and therefore should be protected. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: can't get utf8 / unicode strings from embedded python
On Fri, 23 Aug 2013 13:49:23 -0700, David M. Cotter wrote:
note everything works great if i use Ascii, but:
in my utf8-encoded script i have this:
print frøânçïé
I see you are using Python 2, in which case there are probably two or
three errors being made here.
Firstly, in Python 2, the compiler assumes that the source code is
encoded in ASCII, actually ASCII plus arbitrary bytes. Since your source
code is *actually* UTF-8, the bytes in the file are:
70 72 69 6E 74 20 22 66 72 C3 B8 C3 A2 6E C3 A7 C3 AF C3 A9 22
But Python doesn't know the file is encoded in UTF-8, it thinks it is
reading ASCII plus junk, so when it reads the file it parses those bytes
into a line of code:
print ~
where the ~ represents a bunch of 13 rubbish junk bytes. So that's
the first problem to fix. You can fix this by adding an encoding cookie
at the beginning of your module, in the first or second line:
# -*- coding: utf-8 -*-
The second problem is that even once you've fixed the source encoding,
you're still not dealing with a proper Unicode string. In Python 2, you
need to use u ... delimiters for Unicode, otherwise the results you
get are completely arbitrary and depend on the encoding of your terminal.
For example, if I set my terminal encoding to IBM-850, I get:
fr°Ônþ´Ú
from those bytes. If I set it to Central European ISO-8859-3 I get this:
frĝânçïé
Clearly not what I intended. So change the line of code to:
print ufrøânçïé
Those two changes ought to fix the problem, but if they don't, try
setting your terminal encoding to UTF-8 as well and see if that helps.
[...]
but what it *actually* prints is this:
print frøânçïé
-- frøânçïé
It's hard to say what *exactly* is happening here, because you don't
explain how the python print statement somehow gets into your C++ Log
code. Do I guess right that it catches stdout?
If so, then what I expect is happening is that Python has read in the
source code of
print ~
with ~ as a bunch of junk bytes, and then your terminal is displaying
those junk bytes according to whatever encoding it happens to be using.
Since you are seeing this:
frøânçïé
my guess is that you're using a Mac, and the encoding is set to the
MacRoman encoding. Am I close?
To summarise:
* Add an encoding cookie, to tell Python to use UTF-8 when parsing your
source file.
* Use a Unicode string ufrøânçïé.
* Consider setting your terminal to use UTF-8, otherwise it may not be
able to print all the characters you would like.
* You may need to change the way data gets into your C++ Log function. If
it expects bytes, you may need to use uencode('utf-8') rather than
just u But since I don't understand how data is getting into your
Log function, I can't be sure about this.
I think that is everything. Does that fix your problem?
--
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Conversion Issue in Converting code of 2.7 to 3
Hi,
I am trying to run the following piece of code:
https://greyhat.gatech.edu/wiki/index.php?title=Java_Bytecode_Tutorial/Getting_Started
python Krakatau/assemble.py minimal.j.
The scripts are written for 2.7. I want to convert them to 3.3.
I am struck with the following error:
[]$ python Krakatau/assemble.py minimal.j
Traceback (most recent call last):
File Krakatau/assemble.py, line 4, in module
from Krakatau.assembler import tokenize, parse, assembler
File c:\tmp\ByteCode\Krakatau\Krakatau\assembler\tokenize.py, line
3, in module
from ..classfile import ClassFile
File c:\tmp\ByteCode\Krakatau\Krakatau\classfile.py, line 1, in module
from . import constant_pool, method, field
File c:\tmp\ByteCode\Krakatau\Krakatau\constant_pool.py, line 10
def decodeStr((s,)):
^
SyntaxError: invalid syntax
The code where this error originates from:
def decodeStr((s,)):
return s.replace('\xc0\x80','\0').decode('utf8'),
I looked at http://docs.python.org/3/whatsnew/3.0.html but I couldn't
figure out where
I am going wrong?
--
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Re: Python script help
cool1...@gmail.com writes:
Here are some scripts, how do I put them together to create the script
I want? (to search a online document and download all the links in it)
p.s: can I set a destination folder for the downloads?
You can use os.chdir to go to the desired folder.
urllib.urlopen(http://;)
possible_urls = re.findall(r'\S+:\S+', text)
import urllib2
response = urllib2.urlopen('http://www.example.com/')
html = response.read()
If you insist on not using wget, here is a simple script with
BeautifulSoup (v4):
from bs4 import BeautifulSoup
from urllib2 import urlopen
from urlparse import urljoin
import os
import re
os.chdir('OUT')
def generate_filename(url):
url = re.sub('^[a-zA-Z0-9+.-]+:/*', '', url)
return url.replace('/', '_')
URL = http://www.example.com/;
soup = BeautifulSoup(urlopen(URL).read())
links = soup.select('a[href]')
for link in links:
url = urljoin(URL, link['href'])
print url
html = urlopen(url).read()
fn = generate_filename(url)
with open(fn, 'wb') as outfile:
outfile.write(html)
You should add a more intelligent filename generator, filter out mail:
urls and possibly others and add exception handling for HTTP errors.
--
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WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]
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Re: Conversion Issue in Converting code of 2.7 to 3
On 24/08/2013 03:10, shankha wrote:
Hi,
I am trying to run the following piece of code:
https://greyhat.gatech.edu/wiki/index.php?title=Java_Bytecode_Tutorial/Getting_Started
python Krakatau/assemble.py minimal.j.
The scripts are written for 2.7. I want to convert them to 3.3.
I am struck with the following error:
[]$ python Krakatau/assemble.py minimal.j
Traceback (most recent call last):
File Krakatau/assemble.py, line 4, in module
from Krakatau.assembler import tokenize, parse, assembler
File c:\tmp\ByteCode\Krakatau\Krakatau\assembler\tokenize.py, line 3, in
module
from ..classfile import ClassFile
File c:\tmp\ByteCode\Krakatau\Krakatau\classfile.py, line 1, in module
from . import constant_pool, method, field
File c:\tmp\ByteCode\Krakatau\Krakatau\constant_pool.py, line 10
def decodeStr((s,)):
^
SyntaxError: invalid syntax
The code where this error originates from:
def decodeStr((s,)):
return s.replace('\xc0\x80','\0').decode('utf8'),
I looked athttp://docs.python.org/3/whatsnew/3.0.html but I couldn't figure
out where
I am going wrong?
Look here:
http://docs.python.org/3/whatsnew/3.0.html#changed-syntax
at the Removed Syntax section where it mentions PEP 3113.
A simple fix is:
def decodeStr(arg):
(s,) = arg
return s.replace('\xc0\x80','\0').decode('utf8'),
or:
def decodeStr(s):
return s[0].replace('\xc0\x80','\0').decode('utf8'),
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Fast conversion of numbers to numerator/denominator pairs
I have a need to convert arbitrary non-complex numbers into numerator/
denominator pairs. Numbers could be ints, floats, Fractions or Decimals.
For example:
2 = (2, 1)
0.25 = (1, 4)
Fraction(2, 3) = (2, 3)
Decimal(0.5) = (1, 2)
The first three cases are easy and fast:
# ints and Fractions
number.numerator, number.denominator
# floats are a little slower
number.as_integer_ratio()
But Decimals are unfortunately slower. MUCH slower, about 40 times slower
than Fractions in Python 3.3:
tmp = Fraction.from_decimal(number)
(tmp.numerator, tmp.denominator)
This ends up being the bottleneck in my code: once you include the
scaffolding code to select the right conversion method, processing a
large list of Decimals is about fifty times slower than large lists of
floats or fractions.
Is there a fast way to convert a Decimal into a pair of numbers numerator/
denominator? It *must* be exact, but it doesn't have to be simplest form.
For example, Decimal(0.5) = (5, 10) would be okay, although (1, 2)
would be preferred.
I've tried this function:
def convert(d):
sign, digits, exp = d.as_tuple()
num = int(''.join([str(digit) for digit in digits]))
if sign: num = -num
return num, 10**-exp
which is faster, but not fast enough. Any suggestions?
--
Steven
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Exception Handling Practices / Patterns
Greetings, As I tread through my journey of OO I am trying to determine if there is a good approach for exception handling within classes. From my readings and gatherings - it seems I have found a common theme, but I am trying to solicit from the experts. Here is what I have found (I may be restating the obvious so please forgive me in advance): * Seems like exception handing within Classes is largely avoided and is typically only used when calling external libraries. * Try/Except type statements seem to be used more within modules, main functions, wrapper scripts. * Classes should be coded in a way that exceptions * Better to never write your own exceptions (unless you absolutely have to). * Using Exception is typically a bad. More specific the better. * Exceptions should never fail silently. (Should exceptions always be logged?) Best site I have found for exceptions (hopefully this helps someone): * http://c2.com/cgi/wiki?ExceptionPatterns I'd be interested in hearing others thoughts on this topic with regards to best practices for when to use exceptions, and when to avoid using exceptions. Thank you in advance! -- http://mail.python.org/mailman/listinfo/python-list
[issue18813] Speed up slice object processing
Stefan Behnel added the comment: Here is another patch that remembers the Py_ssize_t slice indices if they are known at instantiation time. It only makes a very small difference for the fannkuch benchmark, so that's no reason to add both the complexity and the (IMHO ignorable) memory overhead. However, it also adds a public C-API function PySlice_FromIndices() that allows setting the values from C code at instantiation time, thus avoiding the overhead of having to do the conversion back again. It might also be worth exploring if we can't instantiate the Python object indices at first request using properties, iff the slice was created with integer indices. Meaning, we'd leave the PyObject* fields NULL in that case until they are being used. That would reduce the overhead of creating the slice object in the first place. Since we added the one-instance cache, it's now dominated by the creation of the index value objects when _PySlice_FromIndices() is being used internally (e.g. when calling PySequence_Get/Set/DelSlice()). -- Added file: http://bugs.python.org/file31431/cache_slice_indices.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18813 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17741] event-driven XML parser
Stefan Behnel added the comment: Ok, so what are we going to do for the next alpha? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17741 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
New submission from Serhiy Storchaka: $ PYTHONIOENCODING= ./python Fatal Python error: Py_Initialize: can't initialize sys standard streams LookupError: unknown encoding: Aborted (core dumped) As a consequence we can't set only the error handler. $ PYTHONIOENCODING=:surrogateescape ./python Fatal Python error: Py_Initialize: can't initialize sys standard streams LookupError: unknown encoding: Aborted (core dumped) Here is a patch which allows accepting empty encoding as default encoding. -- components: Interpreter Core files: empty_pythonioencoding.patch keywords: patch messages: 195946 nosy: haypo, ncoghlan, serhiy.storchaka priority: normal severity: normal stage: patch review status: open title: Empty PYTHONIOENCODING is not the same as nonexistent type: behavior versions: Python 2.7, Python 3.3, Python 3.4 Added file: http://bugs.python.org/file31432/empty_pythonioencoding.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18713] Clearly document the use of PYTHONIOENCODING to set surrogateescape
Changes by Serhiy Storchaka storch...@gmail.com: -- dependencies: +Empty PYTHONIOENCODING is not the same as nonexistent ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18713 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
Changes by Serhiy Storchaka storch...@gmail.com: Removed file: http://bugs.python.org/file31432/empty_pythonioencoding.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
Changes by Serhiy Storchaka storch...@gmail.com: Added file: http://bugs.python.org/file31433/empty_pythonioencoding.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18813] Speed up slice object processing
Changes by Serhiy Storchaka storch...@gmail.com: -- nosy: +mark.dickinson, serhiy.storchaka stage: - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18813 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
Nick Coghlan added the comment: Patch looks good to me. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18816] mmap.flush() is always synchronous, hurting performance
Charles-François Natali added the comment: I propose to add an optional keyword parameter with default value SYNC (compatibility) but that can be ASYNC, INVALIDATE (can be SYNC|INVALIDATE and ASYNC|INVALIDATE too). AFAICT it's mostly useless on a modern OS. MS_INVALIDATE is a no-op on systems with merged VM-buffer cache, i.e. it's not needed for mmap() to reflect write() and vice-versa. So nothing's normally needed to synchronize file and memory. As for MS_ASYNC, it actually doesn't do anything at all on recent OS, e.g. it's a no-op on Linux since a couple years, since modified pages will be written back as part of the normal writeback process. The only thing a user might actually need for an mmap object is to make sure data is actually committed to disk, and MS_SYNC covers this. See e.g. this post by Andrew Morton: http://thread.gmane.org/gmane.linux.kernel/1312660 -- nosy: +neologix ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18816 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18819] tarfile fills devmajor and devminor fields even for non-devices
New submission from Nuutti Kotivuori: when tarfile generates a tar, it uses TarInfo objects which are packed to the binary format. This packing uses itn format for filling the devmajor and devminor fields of the tar file entry, with a default value of zero. The field length is 8 characters, and the formatting will format the values as octal strings, followed by a NUL byte, eg. '000\x00'. However, other common tar tools do not exhibit this behavior, instead leaving the field filled with NUL bytes in case the earlier type field does not indicate a device type. Explicitly, the value generated by other tools is then '\x00\x00\x00\x00\x00\x00\x00\x00'. This causes no interoperability issues (that I am aware of), but makes it hard to attempt to replicate the tar files generated by other tools exactly. I am attaching a simple diff fixing this, but there are probably better ways to fix this. -- components: Library (Lib) files: tarfile.py.diff keywords: patch messages: 195949 nosy: Nuutti.Kotivuori priority: normal severity: normal status: open title: tarfile fills devmajor and devminor fields even for non-devices type: behavior versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4, Python 3.5 Added file: http://bugs.python.org/file31434/tarfile.py.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18819 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
STINNER Victor added the comment: Patch looks good to me, but you have to update Doc/using/cmdline.rst, at least to add a versionchanged section. Tests would also be nice :-) I really like the the PYTHONIOENCODING=:surrogateescape use case! -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
Serhiy Storchaka added the comment:
Second variant of the patch also supports empty error handler as the default
error handler (i.e. strict).
$ PYTHONIOENCODING=ascii: ./python
Python 3.4.0a1+ (default:5b5ef012cd4e+, Aug 23 2013, 10:18:51)
[GCC 4.6.3] on linux
Type help, copyright, credits or license for more information.
print('\xbd')
Traceback (most recent call last):
File stdin, line 1, in module
UnicodeEncodeError: 'ascii' codec can't encode character '\xbd' in position 0:
ordinal not in range(128)
Without it different error is raised:
Traceback (most recent call last):
File stdin, line 1, in module
LookupError: unknown error handler name ''
--
Added file: http://bugs.python.org/file31435/empty_pythonioencoding_2.patch
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[issue18817] Got resource warning when running Lib/aifc.py
Changes by Antoine Pitrou pit...@free.fr: -- nosy: +serhiy.storchaka ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18817 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18807] Allow venv to create copies, even when symlinks are supported
Changes by Antoine Pitrou pit...@free.fr: -- nosy: +vinay.sajip ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18807 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15175] pydoc -k zip throws segmentation fault
Antoine Pitrou added the comment: Yeah, pydoc will walk and import all installed Python modules, which may trigger various kinds of issues with buggy third-party stuff. Note that in 2.x, extension modules compiled with different fundamental options (such as debug/non-debug) aren't differentiated, which may the be cause of the present issue. -- nosy: +pitrou resolution: - rejected status: pending - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue15175 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18623] Factor out the _SuppressCoreFiles context manager
Antoine Pitrou added the comment: Will also be useful for issue #18808 :) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18623 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17588] runpy cannot run Unicode path on Windows
Drekin added the comment: There is over year old closely related issue: http://bugs.python.org/issue13758 . -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17588 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13758] compile() should not encode 'filename' (at least on Windows)
Drekin added the comment: Hello. Will this be fixed? It's really annoying that you cannot pass valid unicode filename to compile(). I'm using a workaround: I just pass placeholder and then “update” the resulting code object recursively to set the correct co_filename. Afterwards the code object can be executed and produces correct tracebacks. (I'm using Windows.) Fixing this will probably fix also http://bugs.python.org/issue17588 . It doesn't bother just me. See e.g. http://stackoverflow.com/questions/8798591/unicodeencodeerror-when-using-the-compile-function . Thank you. Drekin -- nosy: +Drekin ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13758 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18818] Empty PYTHONIOENCODING is not the same as nonexistent
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18818 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16392] import crashes on circular imports in ext modules
Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com: -- nosy: +Arfrever ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16392 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18811] add ssl-based generator to random module
Antoine Pitrou added the comment: Seriously, why are we obsessed with performance when talking about a security feature? Did anyone *actually* complain about urandom() being too slow (ok, someone complained about it eating file descriptors... :-))? The question is whether OpenSSL's random generator produces better randomness than the system one: apparently it's not the case under Linux, how about other systems? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18811 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18820] json.dump() ignores its 'default' option when serializing dictionary keys
New submission from July Tikhonov:
According to documentation of json.dump(), concerning its 'default' option:
default(obj) is a function that should return a serializable version of obj or
raise TypeError. The default simply raises TypeError.
But this function is actually never applied to serialized dictionary keys:
def default(obj):
... if isinstance(obj, bytes):
... return obj.decode('ascii')
... raise ValueError
...
json.dumps(b'asdf')
Traceback (most recent call last):
...
TypeError: b'asdf' is not JSON serializable
json.dumps(b'asdf', default=default)
'asdf'
json.dumps({b'asdf' : 1}, default=default)
Traceback (most recent call last):
...
TypeError: keys must be a string
json.dumps({1 : b'asdf'}, default=default)
'{1: asdf}'
(bytes are used purely for the purpose of example)
Such behavior should be either documented or corrected.
Patch correcting python implementation of json attached.
--
assignee: docs@python
components: Documentation, Library (Lib)
files: json-default-dict-keys.diff
keywords: patch
messages: 195957
nosy: docs@python, july
priority: normal
severity: normal
status: open
title: json.dump() ignores its 'default' option when serializing dictionary keys
type: enhancement
versions: Python 3.4
Added file: http://bugs.python.org/file31436/json-default-dict-keys.diff
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[issue18820] json.dump() ignores its 'default' option when serializing dictionary keys
July Tikhonov added the comment: Oops, my patch disables 'skipkeys' argument of dump. Another version attached. -- Added file: http://bugs.python.org/file31437/json-default-dict-keys.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18820 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18820] json.dump() ignores its 'default' option when serializing dictionary keys
Changes by July Tikhonov july.t...@gmail.com: Removed file: http://bugs.python.org/file31436/json-default-dict-keys.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18820 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18652] Add itertools.first_true (return first true item in iterable)
Changes by Radu Voicilas radu.voici...@gmail.com: -- nosy: +raduv ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18652 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18772] Fix gdb plugin for new sets dummy object
Raymond Hettinger added the comment:
I just applied the dict version of dummy to sets in
http://hg.python.org/cpython/rev/f0202c3daa7a
and it unexpectedly broke test_gdb again:
FAIL: test_sets (test.test_gdb.PrettyPrintTests)
Verify the pretty-printing of sets
--
Traceback (most recent call last):
File
/home/shager/cpython-buildarea/3.x.edelsohn-powerlinux-ppc64/build/Lib/test/test_gdb.py,
line 319, in test_sets
self.assertEqual(gdb_repr, {'b'})
AssertionError: {dummy key type at remote 0x103b35c0, 'b'} != {'b'}
- {dummy key type at remote 0x103b35c0, 'b'}
+ {'b'}
Antoine, can you see what the issue is? Why does this show as the dummy key
type instead of being recognized as the object returned by _PySet_Dummy? I'm
not sure why this works for dicts, but not for sets.
--
assignee: rhettinger - pitrou
status: closed - open
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[issue18821] Add .lastitem attribute to takewhile instances
New submission from Oscar Benjamin: I've often wanted to be able to query a takewhile object to discover the item that failed the predicate but the item is currently discarded. A usage example: def sum(items): it = iter(items) ints = takewhile(Integral.__instancecheck__, it) subtotal = sum(ints) if not hasattr(ints.lastitem): return subtotal floats = takewhile(float.__instancecheck__, it) subtotalf = fsum(floats) if not hasattr(floats.lastitem): return subtotal + subtotalf # Deal with more types ... Loosely what I'm thinking is this but perhaps with different attribute names: class takewhile(pred, iterable): def __init__(self): self.pred = pred self.iterable = iterable self.failed = False def __iter__(self): for item in self.iterable: if self.pred(item): yield item else: self.failed = True self.lastitem = item return -- components: Library (Lib) messages: 195962 nosy: oscarbenjamin priority: normal severity: normal status: open title: Add .lastitem attribute to takewhile instances type: enhancement versions: Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18821 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18772] Fix gdb plugin for new sets dummy object
Antoine Pitrou added the comment: Checking for dummies in dicts in python-gdb.py is implicit (see PyDictObjectPtr.iteritems()): entries whose value is NULL are not printed. Set entries do not have values, so instead pySetObjectPtr.write_repr() uses a hack with the repr() of the key to check for dummies. Instead I think we should re-use the approach in my patch: publish the dummy object as a (private) C API so that python-gdb.py can simply compare the key pointer by equality. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18772 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18812] PyImport_Import redundant calls to find module
Brett Cannon added the comment: Because that is how it has always been: http://hg.python.org/cpython/file/b9b521efeba3/Python/import.c#l3164 . It could be changed but someone out there is relying on those semantics and it's a minor thing to leave in so I don't want to mess with it. -- resolution: - rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18812 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18772] Fix gdb plugin for new sets dummy object
Raymond Hettinger added the comment: Attaching a patch, but I don't have a way to test it. -- Added file: http://bugs.python.org/file31438/fix_dummy.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18772 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18713] Clearly document the use of PYTHONIOENCODING to set surrogateescape
Serhiy Storchaka added the comment: With new subject this issue looks as a duplicate of (or tightly related to) issue12832. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18713 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5876] __repr__ returning unicode doesn't work when called implicitly
Serhiy Storchaka added the comment: In Python 3 ascii() uses the backslashreplace error handler. class T: ... def __repr__(self): ... return '\u20ac\udcff' ... print(ascii(T())) \u20ac\udcff I think using the backslashreplace error handler in repr() in Python 2.7 is good solution. Here is a patch. -- keywords: +patch nosy: +serhiy.storchaka stage: test needed - patch review Added file: http://bugs.python.org/file31439/unicode_repr.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5876 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18812] PyImport_Import redundant calls to find module
Rob Bairos added the comment: However, if it fails __import()__ it doesn't get to the sys.modules[] call anyways. The only case affected by this are: PASS the __import()__ call, then FAIL the sys.modules[] lookup afterwards. Why will that effect anything currently out there? As it stands now, it suppresses development of some types of dynamic hierarchies of modules such as we've implemented, that don't register themselves in sys.modules[] -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18812 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18772] Fix gdb plugin for new sets dummy object
Antoine Pitrou added the comment: Checking repr() perpetuates the original hack so, why it may work, I think it's better if we take the opportunity to solve it cleanly. I'll try to take a look tonight (I suppose you're under Windows?). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18772 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5876] __repr__ returning unicode doesn't work when called implicitly
STINNER Victor added the comment: This change is going to break backward compatibility. I don't think that it can be done in Python 2.7.x, and there is no Python 2.8 (PEP 404). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5876 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18816] mmap.flush() is always synchronous, hurting performance
Jesús Cea Avión added the comment: Depending of a concrete OS implementation is not good. Linux is not the only OS out there, and I have very old machines in production yet: # uname -a Linux colquide..es 2.4.37 #4 Fri Dec 12 01:10:45 CET 2008 i686 unknown I have been hit by the VM/file cache split in the past. Portability is important. Anyway, the Python mmap manual says that mmap.flush() is needed to be sure that you are not going to lose changes you made in the mmap. On modern OSs it is not actually needed, as you say, and the performance hit is important enough for me to investigate and write this enhancement proposal :). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18816 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17883] Fix buildbot testing of Tkinter
Zachary Ware added the comment: Ping! The buildbots still seem to be failing, are my proposed fixes acceptable? Both patches still apply cleanly. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17883 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17702] os.environ converts key type from string to bytes in KeyError exception
Drekin added the comment: This patch introduces a bit ugly traceback. Shouldn't there be “raise from None” or “raise from previous_exc” instead of simple raise? -- nosy: +Drekin ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17702 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18811] add ssl-based generator to random module
Christian Heimes added the comment: I don't get it either. urandom is perfectly fine. I showed that urandom is just a bit slower than SSL_rand(). How about we generalize SystemRandom so users can implement a custom RNG class wby providing a method rng(amount) - bytes? Antoine Pitrou rep...@bugs.python.org schrieb: Antoine Pitrou added the comment: Seriously, why are we obsessed with performance when talking about a security feature? Did anyone *actually* complain about urandom() being too slow (ok, someone complained about it eating file descriptors... :-))? The question is whether OpenSSL's random generator produces better randomness than the system one: apparently it's not the case under Linux, how about other systems? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18811 ___ -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18811 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
