date:20140726

On Sat, Jul 26, 2014 at 5:19 PM, Martin S shieldf...@gmail.com wrote:
 From the newbie point of view, VS is the perfect tool to get people coding.
 All the way back to Visual Basic, Microsoft has consistently pushed the ease
 of creating applications for Windows as a point of adoption.

IMO it's an attractive nuisance at best. Make it easy to build
something simple and flawed, and people will build things that aren't
simple but are still flawed. Microsoft has done this to the world a
few times - how many people do you know who use Excel for jobs that
would be better served by a database? (Or by a script, even; CSV
import into one sheet, manual fixups as required, then CSV export from
another sheet that has a bunch of formula cells. I've seen that done.)
GUI builders, especially those with hey look you don't even need to
write code event handlers, are often like that. Sure, you can make a
simple Hello, world pretty easily. You can go one further and have a
slider and an entry field whose contents are synchronized. But for
building a large and complex application, they tend more to make the
job harder than easier; and for people who've learned on that system
and no other, it's but this works - what, I have to learn a whole new
system now? That new system sucks.

It's the same with everything. I did my first music transposition and
composing with NoteWorthy Composer. It was alright, it got the job
done. But when I wanted to do anything more complex than the authors
planned for, I was stuck. Just adding additional verses to a hymn tune
(music score at the top of the page, four more verses underneath) was
impossible in NWC, so I ended up actually printing out the score, then
physically putting the sheet of paper back in, and printing the
additional verses from a word processor. With LilyPond, I can do
additional verses easily, because the authors planned for it; but more
importantly, I can also do things they didn't plan for, like putting
lyric line breaks into the MIDI file without disrupting the printed
score. (I had to write a little Scheme code to make that work.)

If it comes to that, in a way, programming is all like that. Imagine
buying a device and being allowed to run only the software that its
makers provide. [1] If they think of lots of things, then great! You
want to do something, and there's an app for that. But generally, a
device is sold to more people than built it, and most likely (I'm
definitely making assumptions here) the collective intelligence and
creativity of the buyers exceeds that of the designers. So a smart
designer will make it possible for the device to do more than he
planned, by making it programmable. Sure, it's a bit harder to use
than just touch this and stuff happens, but instead of finite,
pre-coded functionality, you have infinite possibilities.

Since we're all here on python-list, I think we all appreciate the
value of being able to do what someone else didn't think of. I'm happy
to have the same power-at-the-cost-of-effort in GUI building, too.

ChrisA

[1] This scenario is purely hypothetical. Any similarity with real
products whose names begin with the mathematician's shorthand for the
square root of -1 is purely coincidental. Anyway, I'm exaggerating for
emphasis. Slightly.
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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Dietmar Schwertberger


Am 26.07.2014 11:05, schrieb Chris Angelico:

IMO it's an attractive nuisance at best. Make it easy to build
something simple and flawed, and people will build things that aren't
simple but are still flawed. Microsoft has done this to the world a
For most software/tools that's good enough. It's better to have this 
than having

nothing.
Sure, when you have a look at the VB-created programs, most of them are 
flawed,

but still they solve problems.

Currently, Python is ruled out as tool in many situations due to the steep
learning curve when it comes to GUIs, so people use Excel, Labview, Matlab
or whatever (or nothing at all or still VB).


But for
building a large and complex application, they tend more to make the
job harder than easier; and for people who've learned on that system
Most problems that are out there to be adressed require only simple 
applications.


For anything non-trivial I don't see that a GUI-builder, I agree that 
hand-coding

the GUI is the better approach.

But then, we're now in a world where e.g. Qt is moving away from widgets to
QML which makes GUI programming a huge mess (in the same way that PHP
made web-programming a mess).


and no other, it's but this works - what, I have to learn a whole new
system now? That new system sucks.

What is the point of not having tools to ease the entry?
Of course it makes the others, who still learned it, feel cool, but 
other than that?


Regards,

Dietmar

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Re: .Net Like Gui Builder for Python?

On Sat, Jul 26, 2014 at 8:14 PM, Dietmar Schwertberger
maill...@schwertberger.de wrote:
 For most software/tools that's good enough. It's better to have this than
 having
 nothing.
 Sure, when you have a look at the VB-created programs, most of them are
 flawed,
 but still they solve problems.

 Currently, Python is ruled out as tool in many situations due to the steep
 learning curve when it comes to GUIs, so people use Excel, Labview, Matlab
 or whatever (or nothing at all or still VB).

That's exactly what I mean by attractive nuisance. Excel appears to
solve your problem, so you use it, and then as the problem shifts,
your spreadsheet gets more and more complicated, until it appears on
The Daily WTF. Is that really a good thing? I mean, you could have
started with pencil and paper, and that would have been even easier.
The only difference is that you outgrow paper sooner than VB, which
means porting is done on a much smaller code-base and is less of a
problem.

ChrisA
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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Martin S

On 26 Jul 2014 12:16, Dietmar Schwertberger maill...@schwertberger.de
wrote:

 Am 26.07.2014 11:05, schrieb Chris Angelico:

 IMO it's an attractive nuisance at best. Make it easy to build
 something simple and flawed, and people will build things that aren't
 simple but are still flawed. Microsoft has done this to the world a

 For most software/tools that's good enough. It's better to have this than
having
 nothing.
 Sure, when you have a look at the VB-created programs, most of them are
flawed,
 but still they solve problems.


And it gets people coding, adding to existing software and thinking about
how to improve stuff (their own or others) in the future.

Also if you look at any newbie programmer software, it's flawed. But it
wouldn't hurt making it easier creating flawed software. Better than less
software (unless it it's malware)

/martin
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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Sturla Molden

Martin S shieldf...@gmail.com wrote:

 Also if you look at any newbie programmer software, it's flawed. But it
 wouldn't hurt making it easier creating flawed software. Better than less
 software (unless it it's malware)

Malware is rarely flawed. I wish it were, though.

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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Dietmar Schwertberger


Am 26.07.2014 12:25, schrieb Chris Angelico:

The only difference is that you outgrow paper sooner than VB, which
means porting is done on a much smaller code-base and is less of a
problem.
Most Excel or VB based tools are never replaced. They are the 
replacement and final

implementation of the paper solution already.

The world would be a better one if Python was chosen instead of Excel 
for implementation,
offering a continuous path for improvement, but that won't happen 
without an easy-to-use

GUI builder.
(Even though many problems could be addressed without a GUI, it's still 
what people want.)


Regards,

Dietmar


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Online Python Channel

2014-07-26 Thread Adam Nowak

To whom it may concern
We at Eyn2k (Everything you need to know) have dedicated our time to create a 
free educational channel. Our first subject being Python Programming.
Soon excercises will be added, progressing to a graphics calculator and 2D 
vector collisions.
Would it be possible to get a mention of our channel somewhere on your google+ 
page or python.org?
We are taking requests for tutorials and excercises.
Thank you for your time




eyn2k@outlook.comhttps://www.youtube.com/channel/UCad91ea17ynqc0cTokBG3bg/feedhttps://plus.google.com/u/0/115589514656500200774https://www.facebook.com/EYN2K



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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Steven D'Aprano

On Sat, 26 Jul 2014 10:51:31 +, Sturla Molden wrote:

 Martin S shieldf...@gmail.com wrote:
 
 Also if you look at any newbie programmer software, it's flawed. But it
 wouldn't hurt making it easier creating flawed software. Better than
 less software (unless it it's malware)
 
 Malware is rarely flawed. I wish it were, though.

Malware is often buggy. Sometimes so buggy it doesn't even do the job it 
is intended to. Viruses crash. Even the most technologically 
sophisticated virus yet discovered in the wild was buggy: Stuxnet was 
only discovered because of a programming error.

https://en.wikipedia.org/wiki/Stuxnet



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Best place to find sample data

2014-07-26 Thread Nicholas Cannon

Hey I need some sample data to test out and do stuff with. Also I am having 
strange errors with idle when i load a .txt file read it and then print it, 
idle crashes well kind of freezes. Not sure what is wrong here. Also I am 
having troubles with Numpy and its loadtxt function:

ValueError: cannot set an array element with a sequence

So all i need is a good site to download some data from and maybe some fixes 
for these problems.
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Re: Best place to find sample data

2014-07-26 Thread Irmen de Jong

On 26-7-2014 15:41, Nicholas Cannon wrote:
 Hey I need some sample data to test out and do stuff with. Also I am having 
 strange errors with idle when i load a .txt file read it and then print it, 
 idle crashes well kind of freezes. Not sure what is wrong here. Also I am 
 having troubles with Numpy and its loadtxt function:
 
 ValueError: cannot set an array element with a sequence
 
 So all i need is a good site to download some data from and maybe some fixes 
 for these problems.
 

First hit when googling for 'testdata generator site': 
http://www.generatedata.com/
The search produces various other useful looking sites.

The numpy one is probably a typo in your code, please show the offending code.

No idea about your idle problem.


Irmen

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Re: Best place to find sample data

2014-07-26 Thread memilanuk


On 07/26/2014 09:57 AM, Irmen de Jong wrote:

On 26-7-2014 15:41, Nicholas Cannon wrote:

Hey I need some sample data to test out and do stuff with. Also I
am having strange errors with idle when i load a .txt file read it
and then print it, idle crashes well kind of freezes. Not sure what
is wrong here. Also I am having troubles with Numpy and its loadtxt
function:

ValueError: cannot set an array element with a sequence

So all i need is a good site to download some data from and maybe
some fixes for these problems.



First hit when googling for 'testdata generator site':
http://www.generatedata.com/ The search produces various other useful
looking sites.


Another option, driven by python...

https://github.com/joke2k/faker
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Return class.

Hi,

What does return Wrapper do in the following piece of code? Which method does 
it invoke?
I mean return Wrapper invokes __init__ method?

def Tracer(aClass):
class Wrapper:
def __init__(self, *args, **kargs):
self.fetches = 0
self.wrapped = aClass(*args, **kargs)
def __getattr__(self, attrname):
print('Trace: ' + attrname)
self.fetches += 1
print(self.fetches)
return getattr(self.wrapped, attrname)
return Wrapper


Actual program:

def Tracer(aClass):
class Wrapper:
def __init__(self, *args, **kargs):
self.fetches = 0
self.wrapped = aClass(*args, **kargs)
def __getattr__(self, attrname):
print('Trace: ' + attrname)
self.fetches += 1
print(self.fetches)
return getattr(self.wrapped, attrname)
return Wrapper
@Tracer
class Spam:
def __init__(self, *args):
print(*args)
def display(self):
print('Spam!' * 8)

@Tracer
class Person:
def __init__(self, name, hours, rate):
self.name = name
self.hours = hours
self.rate = rate
def pay(self):
return self.hours * self.rate

food = Spam(CARST)
food.display()
print([food.fetches])

bob = Person('Bob', 40, 50)
print(bob.name)
print(bob.pay())

print('')
sue = Person('Sue', rate=100, hours=60)
print(sue.name)
print(sue.pay())

print(bob.name)
print(bob.pay())
print([bob.fetches, sue.fetches])
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Re: Return class.

On Sun, Jul 27, 2014 at 4:29 AM, Satish ML satishmlwiz...@gmail.com wrote:
 What does return Wrapper do in the following piece of code? Which method 
 does it invoke?
 I mean return Wrapper invokes __init__ method?

 def Tracer(aClass):
 class Wrapper:
 def __init__(self, *args, **kargs):
 self.fetches = 0
 self.wrapped = aClass(*args, **kargs)
 def __getattr__(self, attrname):
 print('Trace: ' + attrname)
 self.fetches += 1
 print(self.fetches)
 return getattr(self.wrapped, attrname)
 return Wrapper


It doesn't invoke anything. It returns the class itself - a callable,
subclassable thing, which wraps the passed-in class. When it's used as
a decorator, what happens is that first the basic class gets
constructed, then it gets passed to this function, and whatever this
function returns becomes the resulting class. So, taking the simplest
example:

@Tracer
class Spam:
def __init__(self, *args):
print(*args)
def display(self):
print('Spam!' * 8)

This is like doing this:

class Spam:
def __init__(self, *args):
print(*args)
def display(self):
print('Spam!' * 8)
Spam = Tracer(Spam)

And then Tracer begins executing, with the Spam class as aClass. It
constructs a new class with two methods: an __init__ which passes
everything through to the wrapped class and retains the resulting
object, and a __getattr__ which proxies through to the original with
tracing facilities.

But all it does is construct and return that class. It doesn't call
anything, yet. Calling the class (instantiating an object of it)
happens when the Spam(CARST) call happens; instead of calling the
original Spam class, it calls the special wrapper, which then calls on
the original.

You can look up class decorators in the Python docs; they're not
something you'll use often (and they're something you'll write even
less often), but they can give you a lot of flexibility.

ChrisA
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Re: Return class.

Which line of code is printing [4] and [4, 5, 6, 7] in the output?

from tracer import Tracer
@Tracer
class MyList(list):
def __init__(self, *args):
print(INSIDE MyList)
print(*args)
x = MyList([1, 2, 3])
x.append(4)
print(x.wrapped)
WrapList = Tracer(list)
x = WrapList([4, 5, 6])
x.append(7)
print(x.wrapped)

OUTPUT:

CARST
Trace: display
1
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam!
[1]
Trace: name
1
Bob
Trace: pay
2
2000

Trace: name
1
Sue
Trace: pay
2
6000
Trace: name
3
Bob
Trace: pay
4
2000
[4, 2]
INSIDE MyList
[1, 2, 3]
Trace: append
1
[4]
Trace: append
1
[4, 5, 6, 7]
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Re: Return class.

Which line of code is printing [4] and [4, 5, 6, 7] in the output?

from tracer import Tracer
@Tracer
class MyList(list):
def __init__(self, *args):
print(INSIDE MyList)
print(*args)
x = MyList([1, 2, 3])
x.append(4)
print(x.wrapped)
WrapList = Tracer(list)
x = WrapList([4, 5, 6])
x.append(7)
print(x.wrapped)

OUTPUT:

CARST
Trace: display
1
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam!
[1]
Trace: name
1
Bob
Trace: pay
2
2000

Trace: name
1
Sue
Trace: pay
2
6000
Trace: name
3
Bob
Trace: pay
4
2000
[4, 2]
INSIDE MyList
[1, 2, 3]
Trace: append
1
[4]
Trace: append
1
[4, 5, 6, 7]
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Re: Return class.

Which line of code is printing [4] and [4, 5, 6, 7] in the output?

from tracer import Tracer
@Tracer
class MyList(list):
def __init__(self, *args):
print(INSIDE MyList)
print(*args)
x = MyList([1, 2, 3])
x.append(4)
print(x.wrapped)
WrapList = Tracer(list)
x = WrapList([4, 5, 6])
x.append(7)
print(x.wrapped)

OUTPUT:

CARST
Trace: display
1
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam!
[1]
Trace: name
1
Bob
Trace: pay
2
2000

Trace: name
1
Sue
Trace: pay
2
6000
Trace: name
3
Bob
Trace: pay
4
2000
[4, 2]
INSIDE MyList
[1, 2, 3]
Trace: append
1
[4]
Trace: append
1
[4, 5, 6, 7]
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Re: Return class.

On Sun, Jul 27, 2014 at 5:04 AM, Satish ML satishmlwiz...@gmail.com wrote:
 Which line of code is printing [4] and [4, 5, 6, 7] in the output?

These lines:

 print(x.wrapped)

The .wrapped attribute has the wrapped object, so you're printing out
the thing that would be in x if you weren't using the decorator. Since
that's a subclass of list and doesn't change __str__ or __repr__, it
prints out like a list.

Tip: If you're not sure what line produces what output, tag them all.
Instead of print(x.wrapped), put print(1,x.wrapped), and have a
different number on every line of output. Then you'll easily see which
is which.

ChrisA
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Re: Return class.

Actual program: 

def Tracer(aClass): 
class Wrapper: 
def __init__(self, *args, **kargs): 
self.fetches = 0 
self.wrapped = aClass(*args, **kargs) 
def __getattr__(self, attrname): 
print('Trace: ' + attrname) 
self.fetches += 1 
print(self.fetches) 
return getattr(self.wrapped, attrname) 
return Wrapper 
@Tracer 
class Spam: 
def __init__(self, *args): 
print(*args) 
def display(self): 
print('Spam!' * 8) 

@Tracer 
class Person: 
def __init__(self, name, hours, rate): 
self.name = name 
self.hours = hours 
self.rate = rate 
def pay(self): 
return self.hours * self.rate 

food = Spam(CARST) 
food.display() 
print([food.fetches]) 

bob = Person('Bob', 40, 50) 
print(bob.name) 
print(bob.pay()) 

print('') 
sue = Person('Sue', rate=100, hours=60) 
print(sue.name) 
print(sue.pay()) 

print(bob.name) 
print(bob.pay()) 
print([bob.fetches, sue.fetches]) 


Which line of code is printing [4] and [4, 5, 6, 7] in the output? 
Another module.
from tracer import Tracer 
@Tracer 
class MyList(list): 
def __init__(self, *args): 
print(INSIDE MyList) 
print(*args) 
x = MyList([1, 2, 3]) 
x.append(4) 
print(x.wrapped) 
WrapList = Tracer(list) 
x = WrapList([4, 5, 6]) 
x.append(7) 
print(x.wrapped) 

OUTPUT: 

CARST 
Trace: display 
1 
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam! 
[1] 
Trace: name 
1 
Bob 
Trace: pay 
2 
2000 

Trace: name 
1 
Sue 
Trace: pay 
2 
6000 
Trace: name 
3 
Bob 
Trace: pay 
4 
2000 
[4, 2] 
INSIDE MyList 
[1, 2, 3] 
Trace: append 
1 
[4] 
Trace: append 
1 
[4, 5, 6, 7] 
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Re: Return class.

Hi,

Which lines of code prints [4] and [4, 5, 6, 7] in the output?


Output:

CARST
Trace: display
1
Spam!Spam!Spam!Spam!Spam!Spam!Spam!Spam!
[1]
Trace: name
1
Bob
Trace: pay
2
2000

Trace: name
1
Sue
Trace: pay
2
6000
Trace: name
3
Bob
Trace: pay
4
2000
[4, 2]
INSIDE MyList
[1, 2, 3]
Trace: append
1
[4]
Trace: append
1
[4, 5, 6, 7]

Actual Code:
def Tracer(aClass):
class Wrapper:
def __init__(self, *args, **kargs):
self.fetches = 0
self.wrapped = aClass(*args, **kargs)
def __getattr__(self, attrname):
print('Trace: ' + attrname)
self.fetches += 1
print(self.fetches)
return getattr(self.wrapped, attrname)
return Wrapper
@Tracer
class Spam:
def __init__(self, *args):
print(*args)
def display(self):
print('Spam!' * 8)

@Tracer
class Person:
def __init__(self, name, hours, rate):
self.name = name
self.hours = hours
self.rate = rate
def pay(self):
return self.hours * self.rate

food = Spam(CARST)
food.display()
print([food.fetches])

bob = Person('Bob', 40, 50)
print(bob.name)
print(bob.pay())

print('')
sue = Person('Sue', rate=100, hours=60)
print(sue.name)
print(sue.pay())


Another module that is producing output:

from tracer import Tracer
@Tracer
class MyList(list):
def __init__(self, *args):
print(INSIDE MyList)
print(*args)
  
x = MyList([1, 2, 3])
x.append(4)
print(x.wrapped)
WrapList = Tracer(list)
x = WrapList([4, 5, 6])
x.append(7)
print(x.wrapped)
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Full stack python should be linked on python.org

2014-07-26 Thread Tymoteusz Jankowski

Hi!
Anyone shares my opinion that www.fullstackpython.com should be referenced
here https://www.python.org/about/apps or at least here
https://wiki.python.org/moin/WebProgramming ?
What do you think? It's great source for python web newbies (and not only).



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tel. 698 142 927
email: tymoteusz.jankow...@gmail.com
email do efaktur: tymoteusz.jankowski+...@gmail.com

Jeśli wysyłasz mi pliki biurowe (dokumenty, arkusze, prezentacje..),
upewnij się, że są one w formatach międzysystemowych takich jak: .ODT,
.ODS, .ODP. Wszystkie wspomniane formaty można uzyskać dzięki darmowym
pakietom biurowym LibreOffice http://www.libreoffice.org/download/,
OpenOffice http://www.openoffice.org/download/. Formaty te są obsługiwane
przez większość pakietów biurowych i programów.

If you send me office files, please make sure they are in a cross-platform
format. For editing this means: .ODT, .ODS and .ODP. All of them can be
made by LibreOffice http://www.libreoffice.org/download/, OpenOffice
http://www.openoffice.org/download/ and most other Office Suites and
programs.
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Re: Best place to find sample data

2014-07-26 Thread Denis McMahon

On Sat, 26 Jul 2014 06:41:11 -0700, Nicholas Cannon wrote:

 Hey I need some sample data to test out and do stuff with.

When I want sample data I usually write a python script to generate it.

 Also I am
 having strange errors with idle when i load a .txt file read it and then
 print it, idle crashes well kind of freezes.

Missing libraries? Bad characters in the text file? 

 Not sure what is wrong
 here. Also I am having troubles with Numpy and its loadtxt function:
 
 ValueError: cannot set an array element with a sequence

How about showing us the code concerned, and the text that's being loaded.

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Re: Best place to find sample data

2014-07-26 Thread Nicholas Cannon

On Saturday, July 26, 2014 9:41:11 PM UTC+8, Nicholas Cannon wrote:
 Also I am having troubles with Numpy and its loadtxt function:
 
 
 
 ValueError: cannot set an array element with a sequence

I found out why this has occurred because the csv file i was using didnt have a 
consistent amount of values in each line so when the load text tried to load it 
into a list or whatever some lines had a missing index or something.

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Re: Best place to find sample data

2014-07-26 Thread Nicholas Cannon

Oh the above is quoted here just the bottom line in added in 
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What's the difference between gevent.sleep and time.sleep?

2014-07-26 Thread Xiadong Zhu

Hi, I'm learning gevent, but I didn't found the difference with gevent.sleep 
and time.sleep, does anybody could give me a sample code to show their 
difference? Thanks!
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Re: .Net Like Gui Builder for Python?

2014-07-26 Thread Steve Hayes

On Sat, 26 Jul 2014 14:40:56 -0400, Dennis Lee Bieber wlfr...@ix.netcom.com
wrote:

On Sat, 26 Jul 2014 19:05:21 +1000, Chris Angelico ros...@gmail.com
declaimed the following:

IMO it's an attractive nuisance at best. Make it easy to build
something simple and flawed, and people will build things that aren't
simple but are still flawed. Microsoft has done this to the world a
few times - how many people do you know who use Excel for jobs that
would be better served by a database? (Or by a script, even; CSV
import into one sheet, manual fixups as required, then CSV export from
another sheet that has a bunch of formula cells. I've seen that done.)

   The way they package Office doesn't help... Ignoring the
subscription-based Office 365 I was at Best Buy a few weeks ago... The
only local-install version of Office (HomeOffice I think) had Word, Excel,
and PowerPoint.

   How many /home/ users are creating presentations/slide-shows? Drop
PowerPoint and include Access (which is essentially a GUI builder front-end
for the Jet RDBM engine) and Publisher (seems a home user would do more
with invitations, cards, and maybe reports/brochures)!

The one thing that isn't available with LibreOffice is OneNote, which you
don't seem to be able to get separately, and doesn't seem to have any
documentation (ie 3rd party books on it). But there is Evernote. 




-- 
Steve Hayes from Tshwane, South Africa
Web:  http://www.khanya.org.za/stevesig.htm
Blog: http://khanya.wordpress.com
E-mail - see web page, or parse: shayes at dunelm full stop org full stop uk
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[issue22047] argparse improperly prints mutually exclusive options when they are in a group

2014-07-26 Thread paul j3


paul j3 added the comment:

This patch adds a 

class TestMutuallyExclusiveGroupErrors
test_invalid_add_group() test,

closely modeled on

test_invalid_add_argument()

I'm using ValueError in group add methods (maintaining the similarity with 
add_argument errors).

I haven't changed the documentation.  add_argument_group and 
add_mutually_exclusive_group methods are described as belonging to an 
ArgumentParser, and the examples are consistent with that. An admonition 
against nesting groups would not fit with the current flow.

However to be accurate, these methods belong to _ActionsContainer, the parent 
class for both the parser and groups.  The documentation glosses over this 
detail.  So an alternative way of addressing this issue is to move these 2 
methods to the ArgumentParser class.

--
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[issue22068] test_gc fails after test_idle

2014-07-26 Thread Terry J. Reedy


Terry J. Reedy added the comment:

ConfigDialog is a good guess as I added a minimal test this month.
I will try to revise to not create loops in the first place.

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[issue3982] support .format for bytes

2014-07-26 Thread Terry J. Reedy


Terry J. Reedy added the comment:

http://legacy.python.org/dev/peps/pep-0461/
adds % formatting for bytes and bytes array.

Nick, I have the impression that there was a decision to not add bytes.format. 
Correct? If so, this issue should be closed. If not, what, if anything, has 
been decided?

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[issue3982] support .format for bytes


Nick Coghlan added the comment:

Right, bytes.format was considered as part of the PEP 461 discussions, and 
rejected as an operation that only made sense in the text domain: 
http://www.python.org/dev/peps/pep-0461/#proposed-variations

With PEP 461 accepted, and PEP 460 withdrawn, that means we won't be adding 
bytes.format and bytearray.format.

Issue 20284 covers the implementation of PEP 461.

--
resolution:  - wont fix
stage:  - resolved
status: open - closed

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[issue20284] patch to implement PEP 461 (%-interpolation for bytes)


Nick Coghlan added the comment:

Just noting I'm working on some significant updates to the bytes and bytearray 
docs in issue 21777. I'll try to get that ready for review and merged 
relatively soon, so the docs for this can build on top of those changes.

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[issue21777] Separate out documentation of binary sequence methods


Nick Coghlan added the comment:

OK, I've completed the initial pass through all the methods. Remaining items:

* add back the guarantees where str will return the same object, add those 
guarantees for bytes where applicable
* address the review comments from Zach and Ezio

There are a couple of review comments about removing duplication that I'd like 
to skip addressing for now. I think they're reasonable ideas, but I also think 
it's a lot easier to go wrong with DRY in docs than it is in code. Indeed, this 
whole matter of not documenting the bytes behaviour in the first place was a 
matter of assuming folks could just infer the binary behaviour from the text 
behaviour.

--
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[issue17172] Add turtledemo to IDLE menu

2014-07-26 Thread Ned Deily


Ned Deily added the comment:

Here are some review comments on turtle_demo_v2.patch.

First, the subprocess call to start turtledemo may work ok in your build 
directory but it will not work in general.  Using the standard idiom for 
invoking a new process running the current instance of python, the call should 
look something like:

cmd = [sys.executable, '-c', 'from turtledemo.__main__ import main; main()']
p = subprocess.Popen(cmd)

Also, note that the imp module is deprecated in 3.4 in favor of importlib:

https://docs.python.org/dev/library/imp.html#imp.find_module

I'm not sure there is much point in having this test, though.  The only thing 
it would catch is if some third-party distributor decided to move turtledemo 
into a separate package or not ship it altogether.  It would not work for 2.7, 
even if Demo/turtle was shipped, since, in 2.7, turtledemo is not structured as 
an importable package.

(And, to answer Terry's earlier question: no, the Demo directory is also not 
shipped with the python.org OS X installers for 2.7.  I expect that the 
standard practice among Unix distributors would also be not to ship it by 
default; for one thing, they have to figure out where to install it since we 
don't provide a standard location to do so.  I see that Debian does package up 
Demo into an optional python2.7-examples Debian package.  So there seems to 
be no point in applying this change to 2.7 without also backporting the 
turtledemo repackaging done in 3.x and that would be a larger undertaking 
needing discussion and approval.)

(Ah, but looking at current Debian and Ubuntu, for Python 3.4 I see that they 
have packaged turtledemo as part of their optional 'libpython3.4-testsuite' 
source package.  Plus, they have long packaged IDLE separately 
('idle-python3.4').  That means end users will need to ensure both packages are 
installed to be able to use turtledemo with IDLE.  So I guess that says that 
there *is* a point to the import test.  Ugh.  I'm not sure what other popular 
distributions do.)

Then there is a specific and serious usability problem with this feature on OS 
X.  The subprocess call starts a new process with a second Python interpreter 
to run a second Tcl/Tk instance to run turtledemo next to IDLE.  The turtledemo 
appears *but* the keyboard and mouse focus remains on IDLE which also means 
that the IDLE menu remains active (recall that there is only one menu bar on OS 
X and it shows only the menus from the currently focused GUI application).  
Especially with the proposed menu changes in Issue22065, it would be very 
confusing to the novice user to see the turtledemo window appear, possibly 
covering any IDLE windows, but with the IDLE menu still active and 
keyboard/mouse focus still on IDLE.  It turns out to be a bit tricky to 
reliably activate tbe turtledemo application programmatically from Python 
code without resorting to some hacks.  Here is one hack, making use of a bit of 
AppleScript, that seems to work.  It would need to be tested in non-English OS 
X en
 vironments to make sure it works there also.  

diff Lib/turtledemo/__main__.py
--- a/Lib/turtledemo/__main__.pyFri Jul 25 15:01:18 2014 -0700
+++ b/Lib/turtledemo/__main__.pyFri Jul 25 22:43:58 2014 -0700
@@ -69,6 +69,7 @@
 
 import sys
 import os
+import subprocess

 from tkinter import *
 from idlelib.Percolator import Percolator
@@ -111,6 +112,20 @@
 self.root = root = turtle._root = Tk()
 root.title('Python turtle-graphics examples')
 root.wm_protocol(WM_DELETE_WINDOW, self._destroy)
+if sys.platform == 'darwin':
+# Make sure we are the currently activated OS X application
+# so that our menu bar appears.
+p = subprocess.Popen(
+[
+'osascript',
+'-e', 'tell application System Events',
+'-e', 'set frontmost of the first process whose '
+  'unix id is {} to true'.format(os.getpid()),
+'-e', 'end tell',
+],
+stderr=subprocess.DEVNULL,
+stdout=subprocess.DEVNULL,
+)

 root.grid_rowconfigure(0, weight=1)
 root.grid_columnconfigure(0, weight=1)

There are deprecated OS X Carbon interfaces to do the equivalent, as was used 
in the third-party package appscript. I'm noseying Ronald to see if he has any 
better suggestions for a non-deprecated way to do this (via Cocoa perhaps) and 
that could possibly be made available more generally: IDLE itself could benefit 
from it and would be a better solution than what was used in Issue11571.

I have not tried the patch on Windows or X11 Tk to see if there are similar 
usability issues.  If so, it's possible the wm attribtues . -topmost dance, 
as in Issue11571, might help.

And last, Lita, please don't forget to run make patchcheck before uploading a

[issue19776] Provide expanduser() on Path objects


Claudiu Popa added the comment:

Here's a version of the patch which raises ValueError when the path can't be 
expanded. Hopefully, the used approach is good enough.

--
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[issue16535] json encoder unable to handle decimal

2014-07-26 Thread Ralph Heinkel


Changes by Ralph Heinkel r...@ralph-heinkel.com:


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[issue1152248] Add support for reading records with arbitrary separators to the standard IO stack

2014-07-26 Thread Phil Connell


Changes by Phil Connell pconn...@gmail.com:


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[issue22076] csv module bad grammar in exception message

2014-07-26 Thread Martin Matusiak


New submission from Martin Matusiak:

The csv module has an exception message with bad grammar:

- delimiter must be an 1-character string

an should be a

--
components: Library (Lib)
files: csv_grammar_fix.diff
keywords: patch
messages: 224028
nosy: haypo, numerodix, serhiy.storchaka
priority: normal
severity: normal
status: open
title: csv module bad grammar in exception message
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file36103/csv_grammar_fix.diff

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[issue22077] Improve the error message for various sequences


New submission from Claudiu Popa:

For a couple of sequences (bytes, list, tuple, bytearray), the error when using 
an invalid sequence index is misleading, because it says that only integers are 
allowed, while slices are allowed too.

 a = []
 a['python']
Traceback (most recent call last):
  File stdin, line 1, in module
TypeError: list indices must be integers, not str


For instance, here's how range does it:

 range(1)['a']
Traceback (most recent call last):
  File stdin, line 1, in module
TypeError: range indices must be integers or slices, not str


The attached patch improves these error messages.

--
files: proper_error.patch
keywords: patch
messages: 224029
nosy: Claudiu.Popa
priority: normal
severity: normal
status: open
title: Improve the error message for various sequences
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file36104/proper_error.patch

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[issue22012] struct.unpack('?', '\x02') returns (False,) on Mac OSX


Ronald Oussoren added the comment:

Does anyone have feedback for my proposed patch (other the bug in test code 
when sizeof(bool) != 1,  the test values for big and little endian are in the 
wrong order)?

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[issue15730] Silence unused value warnings under Mac OS X 10.8/clang


Changes by Ronald Oussoren ronaldousso...@mac.com:


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[issue21308] PEP 466: backport ssl changes

2014-07-26 Thread Christian Heimes


Christian Heimes added the comment:

Awesome! :)

I'll try to find some time to check your work when I'm back from EuroPython.

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[issue16535] json encoder unable to handle decimal

2014-07-26 Thread Christian Heimes


Christian Heimes added the comment:

I'm EuroPython 2014 in Berlin. Ralph has approached me and asked me about 
progress on the progress of this patch. I'm reluctant to implement a special 
case for decimals for two reasons:

1) JSON just support floats and decimals are IMHO incompatible with floats. The 
conversion of decial to JSON floats is a loosely operation.

2) Rather than having a special case I would rather go with a general 
implementation that uses an ABC to JSON dump some float-like objects.

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[issue22068] test_gc fails after test_idle


Serhiy Storchaka added the comment:

Here is a patch against 2.7 which get rid of reference loops in Tk variables 
and Font. This will fix not only ConfigDialog, but any similar user code.

In 3.4+ such reference loops are successfully resolved, but I think we should 
foreport this path to 3.4+ because it also fixes other minor bug: callbacks 
registered to trace variable now live while the variable lives, not while 
widget lives.

--
assignee:  - serhiy.storchaka
components: +Tkinter
stage:  - patch review
Added file: http://bugs.python.org/file36105/tkinter_refloops-2.7.patch

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[issue19325] _osx_support imports many modules


Ronald Oussoren added the comment:

The use of context lib in _read_output should not be necessary anymore as file 
objects and NamedTemporaryFile objects already are context managers with the 
right semantics. 

I'm not sure how to avoid the import of tempfile other than adding a minimal 
implementation of tempfile.mkstemp to _osx_support, in particular because the 
fallback code in _osx_support is insecure: It uses a named temporary file in 
/tmp with builtin.open and because the name of the file is predictable there is 
a small risk of overwriting arbitrary files when an attacker has access to 
/tmp. I guess the fallback is there to use during bootstrap, it should really 
be avoided afterwards. 

BTW. A small unscientific test on my laptop didn't see any differences between 
the regular _osx_support and a version where import re was moved inside the 
functions that use that module.  But: that's on a fast laptop with SSD for 
storage, there could easily be a difference on systems with slower storage.

Ned: do you remember what your idea was w.r.t. avoid the use of re? I guess its 
easy enough to replace the current re-using code by code that only uses str 
methods, but your phrasing seems to indicate another plan.

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[issue15398] intermittence on UnicodeFileTests.test_rename at test_pep277 on MacOS X


Ronald Oussoren added the comment:

I'd be in favour of closing this issue, I haven't seen the problem in a while 
and it is almost certainly due to a platform bug on OSX 10.6.

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[issue10964] Mac installer need not add things to /usr/local


Ronald Oussoren added the comment:

There'd still need to be some way to update the shell environment, but I agree 
that there needs to be something better than we have now.

One option is to add a small shell script that can be sourced from the shell 
profile and adds the various python frameworks at the right place in sys.path 
(dynamically checks what's there instead of hardcoding a version in the command 
file we now use).

A nice option to add is to optionally use a configuration file in 
~/Library/Python to control the order in which directories are added to have 
some control on which version of python is used when starting it without a full 
version.  There would then also need to be a script that manages that 
configuration file.

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[issue19776] Provide expanduser() on Path objects


Serhiy Storchaka added the comment:

Here is alternative patch which doesn't use os.path.expanduser() and 
reimplement it's logic. Differences:

* expanduser() is part of concrete path API. This method access environment.
* RuntimeError is raised when user home can't be determined.
* Currently ntpath.expanduser() uses heuristic to expand path with specified 
username. This works with default homedirs but can return wrong result when 
homedirs was moved to different locations. WindowsPath.expanduser() also uses 
heuristic, but more robust. Of course it would be better to get other users 
homedirs from Windows API, and perhaps we should defer this issue until 
implementing pwd or like on Windows.
* Expanded tests.

Interesting, common idiom to escape tilda in relative path (adding ./ prefix) 
doesn't work with pathlib, because . components are ignored.

--
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[issue22076] csv module bad grammar in exception message


Changes by Serhiy Storchaka storch...@gmail.com:


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[issue12243] getpass.getuser works on OSX


Ronald Oussoren added the comment:

The issue still is present, wouldn't it be better to just remove the 
availability annotation from the docs (2.7, 3.4 and trunk) while waiting for a 
better solution? 

That would at least remove confusion for these docs. At the very least the 
Macintosh availability note should be removed, that was used to document that 
a function is available on MacOS 9, which hasn't been supported in a long time 
now.

--
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versions: +Python 3.4, Python 3.5 -Python 3.2, Python 3.3

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[issue19776] Provide expanduser() on Path objects


Claudiu Popa added the comment:

Looks good.

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


New submission from Claudiu Popa:

Given the following example, Python 3.5 doesn't emit any resource warning:

import io, gc
f = open(a)
bufio = io.BufferedReader(f)
gc.collect()


Here's a small patch that enables this.

--
components: IO
files: buffered_io_resource_warning.patch
keywords: patch
messages: 224040
nosy: Claudiu.Popa
priority: normal
severity: normal
status: open
title: io.BufferedReader hides ResourceWarnings when garbage collected
type: behavior
versions: Python 3.5
Added file: http://bugs.python.org/file36107/buffered_io_resource_warning.patch

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Serhiy Storchaka added the comment:

All works to me.

$ ./python -Wall -c open('/dev/null', 'rb')
-c:1: ResourceWarning: unclosed file _io.BufferedReader name='/dev/null'

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[issue22068] test_gc fails after test_idle


STINNER Victor added the comment:

I agree that the patch shoukd also br applied to 3.4.

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Claudiu Popa added the comment:

That's not the same, try with my example. open(a) will be a TextIOWrapper.

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[issue21308] PEP 466: backport ssl changes


Nick Coghlan added the comment:

Thanks for working through this!

I've kicked it in the direction of the Fedora Python SIG folks 
(https://lists.fedoraproject.org/pipermail/python-devel/2014-July/000611.html), 
since it would be good if we could get it tested before it makes its way into 
an upstream release.

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Claudiu Popa added the comment:

I mean this one:

$ python_d -Wall -c f=open('a', 'r'); import io; io.BufferedReader(f)

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Serhiy Storchaka added the comment:

This example is not correct.

1) Argument of BufferedReader should be binary stream.

 import io, gc
 f = open('/dev/null')
 bufio = io.BufferedReader(f)
 bufio.read(1)
Traceback (most recent call last):
  File stdin, line 1, in module
AttributeError: '_io.TextIOWrapper' object has no attribute 'readinto'

2) gc.collect() doesn't collect file streams because references to them are 
saved in local variables.

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Claudiu Popa added the comment:

You're right, thanks for the new information. You can close the issue then.

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[issue22078] io.BufferedReader hides ResourceWarnings when garbage collected


Changes by Serhiy Storchaka storch...@gmail.com:


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status: open - closed

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[issue19875] test_getsockaddrarg occasional failure

2014-07-26 Thread koobs


koobs added the comment:

Thank you for taking care of this Charles-François :) Requesting backport to 
3.3 and 2.7 too please, both are open for fixes.

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[issue22079] Ensure in PyType_Ready() that base class of static type is static


New submission from Serhiy Storchaka:

It would be good if PyType_Ready() will check that base class of static type is 
static.

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components: Interpreter Core
messages: 224049
nosy: alex, haypo, serhiy.storchaka
priority: normal
severity: normal
stage: needs patch
status: open
title: Ensure in PyType_Ready() that base class of static type is static
type: enhancement
versions: Python 2.7, Python 3.4, Python 3.5

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[issue22080] Add windows_helper module helper


New submission from Claudiu Popa:

Hi. This patch adds a new test helper module, initially added in issue21518, 
for controlling various aspects on Windows platform, like acquiring / releasing 
privileges etc. At the same time, it contains a modification in 
test.support.skip_unless_symlink, so that it tries to acquire the privilege, 
failing otherwise. The only downside is that acquiring 
SeCreateSymbolicLinkPrivilege is only possible for admins and it seems to be 
that they have the privilege by default. On the other hand, for 
SeBackupPrivilege must be explicitly acquired, so the purpose of this module 
isn't redundant.

The part of acquiring a privilege using ctypes is based on similar code by 
Jason R. Coombs.

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components: Tests
files: windows_helper.patch
keywords: patch
messages: 224050
nosy: Claudiu.Popa, zach.ware
priority: normal
severity: normal
status: open
title: Add windows_helper module helper
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file36108/windows_helper.patch

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[issue21518] Expose RegUnloadKey in winreg


Changes by Claudiu Popa pcmantic...@gmail.com:


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[issue19875] test_getsockaddrarg occasional failure

2014-07-26 Thread Roundup Robot


Roundup Robot added the comment:

New changeset 57e3c4ae37ea by Charles-François Natali in branch '2.7':
Issue #19875: Fix random test_getsockaddrarg() failure.
http://hg.python.org/cpython/rev/57e3c4ae37ea

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[issue19875] test_getsockaddrarg occasional failure

2014-07-26 Thread Charles-François Natali


Charles-François Natali added the comment:

Backported to 2.7 (don't know how Iforgot it).
3.3 is only open for security issues, so not backporting.

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7


New submission from STINNER Victor:

Currently, the C module _socket has an useful representation of socket: it 
gives the file descriptor, family, type, etc. The Python socket module only 
shows the memory address. Example:

$ ./python -c 'import _socket; s=_socket.socket(); print(repr(s));'
socket object, fd=3, family=2, type=1, protocol=0

$ ./python -c 'import socket; s=socket.socket(); print(repr(s));'
socket._socketobject object at 0x7fad1fdcbba0

I propose to backport repr(socket.socket) from Python 3.5 to Python 2.7. With 
the patch, the Python socket even contains *more* information than the C module 
(laddr and raddr). Example with the patch applied:

$ ./python -c 'import socket; s=socket.socket(); print(repr(s));'
socket._socketobject fd=3, family=2, type=1, proto=0, laddr=('0.0.0.0', 0)

In Python 2.7, when a socket is closed, it drops the underlying C _socket 
object. So it's not possible to provide a better representation than:

$ ./python -c 'import socket; s=socket.socket(); s.close(); print(repr(s));'
socket._socketobject[closed]

I don't want to change the design of the Python module, Python 2.7 is very 
stable. I don't want to take the risk of breaking anything.

--
files: socket_repr.patch
keywords: patch
messages: 224053
nosy: haypo
priority: normal
severity: normal
status: open
title: Backport repr(socket.socket) from Python 3.5 to Python 2.7
type: enhancement
versions: Python 2.7
Added file: http://bugs.python.org/file36109/socket_repr.patch

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7


Changes by STINNER Victor victor.stin...@gmail.com:


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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7


STINNER Victor added the comment:

I also fixed repr(_socket.socket) on Windows 64-bit for closed sockets (on 
Python 2.7, 3.4 and 3.5):

changeset:   91881:04c916a1e82f
branch:  2.7
tag: tip
user:Victor Stinner victor.stin...@gmail.com
date:Sat Jul 26 14:52:55 2014 +0200
files:   Lib/test/test_socket.py Misc/NEWS Modules/socketmodule.c
description:
Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError
on closed socket.


changeset:   91880:a86c273a1270
branch:  2.7
user:Victor Stinner victor.stin...@gmail.com
date:Sat Jul 26 14:47:56 2014 +0200
files:   Modules/socketmodule.c
description:
socketmodule.c: backport INVALID_SOCKET from Python 3.5 to simplify the code

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[issue19875] test_getsockaddrarg occasional failure

2014-07-26 Thread koobs


koobs added the comment:

Updating versions to reflect branch changes. Will come in handy for those 
tracking for manual packaging backports

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7

2014-07-26 Thread Antoine Pitrou


Changes by Antoine Pitrou pit...@free.fr:


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[issue19838] test.test_pathlib.PosixPathTest.test_touch_common fails on FreeBSD with ZFS

2014-07-26 Thread Larry Hastings


Larry Hastings added the comment:

This test also fails on Linux when using ZFS.

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[issue8232] webbrowser.open incomplete on Windows

2014-07-26 Thread Brandon Milam


Brandon Milam added the comment:

In order to fix the issue I added on to the WindowsDefault class so that it is 
the main browser class for windows platforms as opposed to being a default when 
no other browser is given. I gave the class an init where it specifies specific 
flags for firefox, chrome, and internet explorer (from what I could find there 
aren't really new window or new tab flags for internet explorer). If the flags 
for other browsers are known they should be easy to add to this section.

def __init__(self,browser = windows-default):
# Grab the different flags for the different browser types
browser.lower()
self.browsername = browser
# If get() is used without arguments browser will be passed None
if browser == windows_default or browser == None:
self.cmd = start
elif browser == 'iexplore' or browser == 'internet explorer':
self.cmd = start iexplore
self.newwindow = 
self.newtab = 
elif browser == chrome:
self.cmd = start chrome.exe
self.newwindow = -new-window
self.newtab = -new-tab
elif browser == firefox:
self.cmd = start firefox.exe
self.newwindow = -new-window
self.newtab = -new-tab
else:
raise Error('The browser you entered (%s) is not currently 
supported on windows' % browser)

In the open method of the WindowsDefault class I changed how the browser is 
opened by building a command from the flags and the cmd for the specific 
browser and used subprocess,call.

# Format the command for optional arguments and add the url
if new == 1:
self.cmd +=   + self.newwindow
elif new == 2:
self.cmd +=   + self.newtab
self.cmd +=   + url

subprocess.call(self.cmd,shell = True)

This allows the user to input different new arguments to open a new window or 
new tab like the documentation says they should be able to do. I added a little 
bit to the beginning of the get function so that it passes its argument to the 
WindowsDefault class and returns that object on Windows systems.

# Let the windows default class handle different browsers on windows
if sys.platform[:3] == win:
return WindowsDefault(using)

This adds some of the desired compatibility but does not completely address the 
module's issues. I did not see a way to open a web page in a currently open 
page on any of the browsers, just new windows and new tabs (when no flags are 
passed the browsers default to one of these two options). Also the 
_isexecutable function's attempt at windows compatibility is still not working 
because I was unsure of how to use just a string of a browser name like 
'chrome' to determine if a file is on a system. This leaves _tryorder not 
properly containing the browsers on the system. This leaves the module's open, 
open_new and open_new_tab not properly working either just the WindowsDefault 
open method.
Any feed back and direction from here is most welcome.

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Added file: http://bugs.python.org/file36110/webbrowserdebug.py

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[issue22082] Clear interned strings listed in slotdefs

2014-07-26 Thread Martin v . Löwis


New submission from Martin v. Löwis:

I'm chasing objects left at shutdown. I found that the string objects in 
slotdefs are still around at the end; this patch removes them.

--
files: type.diff
keywords: patch
messages: 224058
nosy: loewis
priority: normal
severity: normal
status: open
title: Clear interned strings listed in slotdefs
Added file: http://bugs.python.org/file36111/type.diff

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[issue22082] Clear interned strings listed in slotdefs

2014-07-26 Thread Roundup Robot


Roundup Robot added the comment:

New changeset c55300337932 by Martin v. Löwis in branch 'default':
Issue #22082: Clear interned strings in slotdefs.
http://hg.python.org/cpython/rev/c55300337932

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[issue8232] webbrowser.open incomplete on Windows

2014-07-26 Thread Brandon Milam


Brandon Milam added the comment:

How the _isexecutable function is set up now it would require a full path name 
in order to be able to tell if a specific browser is on the system. The area 
under platform support for windows checks for multiple browsers using this 
function but only passes it browser names and so it always returns false and 
does not add any browsers to _tryorder. I found a way to fix this using os.walk 
so that the simple strings of the browser names like firefox.exe is able to 
actually able to be found on the system. This method is rather slow though and 
the module wants to check for 8 browsers when imported.

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7

2014-07-26 Thread Guido van Rossum


Guido van Rossum added the comment:

Antoine, what do you want me to do?  I think improving __repr__ of a socket 
sounds fine for some Python 2.7 bugfix release.

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[issue22083] Refactor PyShell's breakpoint related methods

2014-07-26 Thread Saimadhav Heblikar


New submission from Saimadhav Heblikar:

This refactoring is required to enable setting/clearing breakpoints, using 
linenumbering( whether using a Canvas implementation or a Text implementation 
http://bugs.python.org/issue17535)
The patch ensures consistency between the set_breakpoint(_here) and
clear_breakpoint(_here) methods. The clear_breakpoint_here, which is not 
present currently has been added.
No functionality has been added or removed, so I think it should be safe to go 
forward.

--
components: IDLE
files: pyshell-breakpoint-refactor.diff
keywords: patch
messages: 224062
nosy: jesstess, sahutd, taleinat, terry.reedy
priority: normal
severity: normal
status: open
title: Refactor PyShell's breakpoint related methods
versions: Python 2.7, Python 3.4, Python 3.5
Added file: http://bugs.python.org/file36112/pyshell-breakpoint-refactor.diff

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[issue19838] test.test_pathlib.PosixPathTest.test_touch_common fails on FreeBSD with ZFS

2014-07-26 Thread Larry Hastings


Larry Hastings added the comment:

Sorry to have such an awful configuration, but this approach won't fix the 
problem for me.

I use a Linux encrypted home directory, which uses crazy loopback mount logic 
to create an on-the-fly decrypted representation of my home directory.  So my 
home directory is actually on an ecryptfs device:

% df -T
FilesystemType  Mounted on
...
home  zfs   /home
/home/larry/.Private  ecryptfs  /home/larry

Maybe we could ignore deltas below a certain race-condition threshold?  Perhaps 
a millisecond?  I think there are already tests like that.

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7


Serhiy Storchaka added the comment:

I afraid this can break doctests. Isn't this against policy?

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[issue19838] test.test_pathlib.PosixPathTest.test_touch_common fails on FreeBSD with ZFS

2014-07-26 Thread Antoine Pitrou


Antoine Pitrou added the comment:

So, I'm not against the patch, but it would be nice to diagnose where exactly 
the issue comes from.

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[issue19838] test.test_pathlib.PosixPathTest.test_touch_common fails on FreeBSD with ZFS

2014-07-26 Thread Larry Hastings


Larry Hastings added the comment:

(By this approach I meant the approach employed in the first patch posted.  
Sorry for the ambiguity.)

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[issue22074] Lib/test/make_ssl_certs.py fails with NameError

2014-07-26 Thread Roundup Robot


Roundup Robot added the comment:

New changeset 83628d9e1035 by Antoine Pitrou in branch '3.4':
Issue #22074: Fix Lib/test/make_ssl_certs.py
http://hg.python.org/cpython/rev/83628d9e1035

New changeset 17f46a7b1125 by Antoine Pitrou in branch 'default':
Issue #22074: Fix Lib/test/make_ssl_certs.py
http://hg.python.org/cpython/rev/17f46a7b1125

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[issue22074] Lib/test/make_ssl_certs.py fails with NameError

2014-07-26 Thread Antoine Pitrou


Antoine Pitrou added the comment:

Good catch, this is now solved.

--
resolution:  - fixed
stage:  - resolved
status: open - closed
type:  - behavior
versions: +Python 3.4

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7

2014-07-26 Thread Guido van Rossum


Guido van Rossum added the comment:

I don't think it's against policy. Do doctests even work for objects that have 
an address as part of their repr()?

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7


Serhiy Storchaka added the comment:

See for example test_generators, test_genexps, test_xml_etree or 
ctypes.test.test_objects.

 dict(a = (i for i in xrange(10))) #doctest: +ELLIPSIS
{'a': generator object genexpr at ...}

 repr(element)   # doctest: +ELLIPSIS
Element 't\\xe4g' at 0x...

But unit tests can be broken too. When I enhanced reprs this week (issue22031, 
issue22032), I needed to correct failed tests. Due to this facts I applied 
patches only to 3.5.

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[issue22084] Mutating while iterating

2014-07-26 Thread Aaron Brady

New submission from Aaron Brady:

Hi, I asked about the inconsistency of the RuntimeError being raised when
mutating a container while iterating over it here [1], set and dict iteration
on Aug 16, 2012.

[1] http://www.gossamer-threads.com/lists/python/python/1004659

I posted a patch on the ML but never submitted it. People's reaction seemed
ambivalent. Now I have an idea for a different implementation. I'd like to
take another shot at it.

It's one of the worst silent errors, since there's an error in the *iterator*
when we call a *set* method. We're going to add something to make it safer, at
least in the sense of getting a clear failure, if the programmer does something
that's always been ill-advised.

We have a number of options for the implementation. We still have the option
to introduce IterationError, possibly a subclass of RuntimeError. These
options are still applicable:

1) Collection of iterators
. Invalidate all open iterators on mutating
. a) Linked list
.. i) Uncounted references
.. ii) Counted references
.. iii) Weak references
. b) Weak set
2) Version index / timestamp / memo
. Iterators check whether the container has been mutated
since they were created
. a) No overflow - Python longs
.. i) Reset index if no iterators left
. b) Overflow - C ints / shorts (silent error)
3) Iterator count
. Raise exception on mutation, not iteration

The new option is:

2d) Use a dedicated empty *object* for a timestamp or memo. A new memo is
created on every mutation. Before advancing, the iterator checks whether the
current memo is a different object than it was when it was created.

Costs: The existing silent error is fairly rare. The container gains a pointer
to its current memo. The iterator loses the cached length but gains a pointer
to a memo. The memos are blank objects: a Py ssize t and a pointer with
certain flags at time of writing. Speed is the same: comparing the lengths is
replaced with comparing the memos.

Some caveats: The memory manager is used to obtain perpetually unique IDs. A
unique algorithm could be used instead of the memory manager, though the memo
needs to contain a reference count more or less regardless. There can at most
be one memo per iterator. The approach is outlined in pseudocode here [2].
Implementation could be optimized slightly by only creating new memos if
iterators have been opened, shown here [3].

[2]
http://home.comcast.net/~castironpi-misc/irc-0168%20mutating%20while%20iterating%20markup.html

[3]
http://home.comcast.net/~castironpi-misc/irc-0168%20mutating%20while%20iterating%202%20markup.html

--
components: Library (Lib)
messages: 224071
nosy: castironpi
priority: normal
severity: normal
status: open
title: Mutating while iterating
type: behavior
versions: Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4, Python 3.5

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[issue20093] Wrong OSError message from os.rename() when dst is a non-empty directory

2014-07-26 Thread Matthias Klose


Matthias Klose added the comment:

3.4.0 has this fixed. resolutions in http://bugs.python.org/issue16074 and 
http://bugs.python.org/issue20517

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[issue22084] Mutating while iterating


Serhiy Storchaka added the comment:

It would be better discuss such ideas on python-ideas mailing list 
(http://mail.python.org/mailman/listinfo/python-ideas).

Option 3 breaks existing code such as

for k, v in d.items():
if pred(k, v):
d[k] = newvalue
break

Option 1 is memory inefficient. It requires a list of iterators in every dict 
(well, in almost every dict). And it doesn't look more time efficient than 
option 2.

Implementation of option 2 was provided and rejected in issue19332.

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7

2014-07-26 Thread Guido van Rossum


Guido van Rossum added the comment:

OK, I'm convinced. Sorry Victor.

On Saturday, July 26, 2014, Serhiy Storchaka rep...@bugs.python.org wrote:


 Serhiy Storchaka added the comment:

 See for example test_generators, test_genexps, test_xml_etree or
 ctypes.test.test_objects.

  dict(a = (i for i in xrange(10))) #doctest: +ELLIPSIS
 {'a': generator object genexpr at ...}

  repr(element)   # doctest: +ELLIPSIS
 Element 't\\xe4g' at 0x...

 But unit tests can be broken too. When I enhanced reprs this week
 (issue22031,
 issue22032), I needed to correct failed tests. Due to this facts I applied
 patches only to 3.5.

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[issue22081] Backport repr(socket.socket) from Python 3.5 to Python 2.7

2014-07-26 Thread Alex Gaynor


Alex Gaynor added the comment:

Personally I don't think it is (or should) be against policy to change reprs, 
there's not really any way to improve them otherwise.

That said, my excitement level about this issue is pretty low, so I won't argue 
more than this :-)

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[issue21308] PEP 466: backport ssl changes

2014-07-26 Thread Alex Gaynor


Alex Gaynor added the comment:

New patch cherry pick's the fix from issue22074.

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Added file: http://bugs.python.org/file36113/ssl-backport.diff

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[issue22069] TextIOWrapper(newline=\n, line_buffering=True) mistakenly treat \r as a newline


Changes by Serhiy Storchaka storch...@gmail.com:


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[issue1152248] Add support for reading records with arbitrary separators to the standard IO stack

2014-07-26 Thread Akira Li


Akira Li added the comment:

 As a side-effect it also fixes the bug in line_buffering=True
 behavior, see issue22069O.

It should be issue22069 TextIOWrapper(newline=\n, line_buffering=True) 
mistakenly treat \r as a newline

Reuploaded the patch so that it applies cleanly on the current tip.

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Added file: http://bugs.python.org/file36114/io-newline-issue1152248-2.patch

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[issue22069] TextIOWrapper(newline=\n, line_buffering=True) mistakenly treat \r as a newline


Serhiy Storchaka added the comment:

Looks as this behavior is intentional. Documentation should be corrected.

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nosy: +benjamin.peterson, docs@python, hynek, pitrou, stutzbach

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[issue22085] Update deprecated Tcl commands in Tkinter