date:20150504

But when I do:
import urllib3.contrib.pyopenssl
I get:
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", 
line 55, in 
import OpenSSL.SSL
  File "/usr/lib64/python3.4/site-packages/OpenSSL/__init__.py", line 8, in 

from OpenSSL import rand, crypto, SSL
  File "/usr/lib64/python3.4/site-packages/OpenSSL/rand.py", line 9, in 

from six import integer_types as _integer_types
ImportError: No module named 'six'

When I then give:
pip3 install -U OpenSSL
It goes wrong:
Could not fetch URL https://pypi.python.org/simple/OpenSSL/: 404 Client 
Error: Not Found

I checked and even
https://pypi.python.org/simple/
does not exist. Anyone an idea what is happening here?

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when does newlines get set in universal newlines mode?

2015-05-04 Thread arekfu

Hi all,

I have a text file with Windows-style line terminators (\r\n) which I open in 
universal newlines mode (Python 2.7). I would expect the newlines attribute to 
be set after the first call to the readline() method, but apparently this is 
not the case:

>>> f=open('test_crlf', 'rU')
>>> f.newlines
>>> f.readline()
'foo\n'
>>> f.newlines
>>> f.readline()
'bar\n'
>>> f.newlines
'\r\n'
On the other hand, the newlines attribute gets set after the first call to 
readline() on a file with Unix-style line endings.

Is this a bug or a feature?

Thanks in advance,
Davide
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Re: Cannot update OpenSSL for Python3

On Mon, May 4, 2015 at 6:58 PM, Cecil Westerhof  wrote:
> When I then give:
> pip3 install -U OpenSSL
> It goes wrong:
> Could not fetch URL https://pypi.python.org/simple/OpenSSL/: 404 Client 
> Error: Not Found
>
> I checked and even
> https://pypi.python.org/simple/
> does not exist. Anyone an idea what is happening here?

I think what you want is called pyOpenSSL, not just OpenSSL:

https://pypi.python.org/pypi/pyOpenSSL
https://pypi.python.org/simple/pyopenssl/

Not sure why /simple/ doesn't work, but you're not normally meant to
grab that page manually - it's for script work. You could raise a
tracker issue about that if you like, but it may not be considered
important.

Does 'pip3 install -U pyOpenSSL' work?

ChrisA
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Why do I get SyntaxError: invalid syntax

While copying pasting code to test, the following works:
from itertools  import islice
from os import rename
from os.pathimport expanduser, split
from tempfile   import NamedTemporaryFile

real_file = (expanduser('~/Twitter/testing.txt'))
(filepath,
 file)  = split(real_file)
with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, 
delete = False) as tf:
tempfile = tf.name
with open(real_file, 'r') as f:
for line in islice(f, 1, None):
tf.write(line)

rename(tempfile, real_file)

But first I used:
from itertools  import islice
from os import rename
from os.pathimport expanduser, split
from tempfile   import NamedTemporaryFile

real_file = (expanduser('~/Twitter/testing.txt'))
(filepath,
 file)  = split(real_file)
with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, 
delete = False) as tf:
tempfile = tf.name
with open(real_file, 'r') as f:
for line in islice(f, 1, None):
tf.write(line)
rename(tempfile, real_file)

But that gave:
  File "", line 6
rename(tempfile, real_file)
 ^
SyntaxError: invalid syntax

Why?

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Re: when does newlines get set in universal newlines mode?

2015-05-04 Thread Peter Otten

[email protected] wrote:

> Hi all,
> 
> I have a text file with Windows-style line terminators (\r\n) which I open
> in universal newlines mode (Python 2.7). I would expect the newlines
> attribute to be set after the first call to the readline() method, but
> apparently this is not the case:
> 
 f=open('test_crlf', 'rU')
 f.newlines
 f.readline()
> 'foo\n'
 f.newlines
 f.readline()
> 'bar\n'
 f.newlines
> '\r\n'
> On the other hand, the newlines attribute gets set after the first call to
> readline() on a file with Unix-style line endings.
> 
> Is this a bug or a feature?

According to

https://docs.python.org/2.7/library/functions.html#open

"""
If Python is built without universal newlines support a mode with 'U' is the 
same as normal text mode. Note that file objects so opened also have an 
attribute called newlines which has a value of None (if no newlines have yet 
been seen), '\n', '\r', '\r\n', or a tuple containing all the newline types 
seen.
"""

I tried:

>>> with open("tmp.txt", "wb") as f: f.write("alpha\r\nbeta\rgamma\n")
... 
>>> f = open("tmp.txt", "rU")
>>> f.newlines
>>> f.readline()
'alpha\n'
>>> f.newlines 
# expected: '\r\n'
>>> f.readline()
'beta\n'
>>> f.newlines
'\r\n' # expected: ('\r', '\r\n')
>>> f.readline()
'gamma\n'
>>> f.newlines
('\r', '\n', '\r\n')

I believe this is a bug.

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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 12:10 CEST schreef Chris Angelico:

> On Mon, May 4, 2015 at 6:58 PM, Cecil Westerhof  wrote:
>> When I then give: pip3 install -U OpenSSL It goes wrong: Could not
>> fetch URL https://pypi.python.org/simple/OpenSSL/: 404 Client
>> Error: Not Found
>>
>> I checked and even
>> https://pypi.python.org/simple/
>> does not exist. Anyone an idea what is happening here?
>
> I think what you want is called pyOpenSSL, not just OpenSSL:
>
> https://pypi.python.org/pypi/pyOpenSSL
> https://pypi.python.org/simple/pyopenssl/
>
> Not sure why /simple/ doesn't work, but you're not normally meant to
> grab that page manually - it's for script work. You could raise a
> tracker issue about that if you like, but it may not be considered
> important.
>
> Does 'pip3 install -U pyOpenSSL' work?
Not really, because that gives:
Requirement already up-to-date: pyOpenSSL in 
/usr/lib64/python3.4/site-packages
Cleaning up...

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Re: Why do I get SyntaxError: invalid syntax

On Mon, May 4, 2015 at 9:31 PM, Cecil Westerhof  wrote:
> While copying pasting code to test, the following works:
> [chomp]
> But first I used:
> with NamedTemporaryFile(mode = 'w', prefix = file + '_', dir = filepath, 
> delete = False) as tf:
> tempfile = tf.name
> with open(real_file, 'r') as f:
> for line in islice(f, 1, None):
> tf.write(line)
> rename(tempfile, real_file)
>
> But that gave:
>   File "", line 6
> rename(tempfile, real_file)
>  ^
> SyntaxError: invalid syntax
>
> Why?

To clarify: When you say "to test", you mean the interactive
interpreter, right? If so, you need to end blocks of text with blank
lines (and not have any blank lines in between). It's because the
parser has to know when to run stuff; when you run a script, it parses
the whole thing and then runs it, but interactively, it has to work
piece-meal.

ChrisA
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Re: when does newlines get set in universal newlines mode?

On Mon, May 4, 2015 at 10:01 PM, Peter Otten <[email protected]> wrote:
> I tried:
>
 with open("tmp.txt", "wb") as f: f.write("alpha\r\nbeta\rgamma\n")
> ...
 f = open("tmp.txt", "rU")
 f.newlines
 f.readline()
> 'alpha\n'
 f.newlines
> # expected: '\r\n'
 f.readline()
> 'beta\n'
 f.newlines
> '\r\n' # expected: ('\r', '\r\n')
 f.readline()
> 'gamma\n'
 f.newlines
> ('\r', '\n', '\r\n')
>
> I believe this is a bug.

I'm not sure it is, actually; imagine the text is coming in one
character at a time (eg from a pipe), and it's seen "alpha\r". It
knows that this is a line, so it emits it; but until the next
character is read, it can't know whether it's going to be \r or \r\n.
What should it do? Read another character, which might block? Put "\r"
into .newlines, which might be wrong? Once it sees the \n, it knows
that it was \r\n (or rather, it assumes that files do not have lines
of text terminated by \r followed by blank lines terminated by \n -
because that would be stupid).

It may be worth documenting this limitation, but it's not something
that can easily be fixed without removing support for \r newlines -
although that might be an option, given that non-OSX Macs are
basically history now.

ChrisA
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Re: Cannot update OpenSSL for Python3

On Mon, May 4, 2015 at 9:32 PM, Cecil Westerhof  wrote:
>> Does 'pip3 install -U pyOpenSSL' work?
> Not really, because that gives:
> Requirement already up-to-date: pyOpenSSL in 
> /usr/lib64/python3.4/site-packages
> Cleaning up...

I don't know why it wasn't automatically installed, but 'six' is a
listed dependency of pyOpenSSL. What happens if you try to install
six?

ChrisA
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2015-05-04 Thread briansgoins via Python-list

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Re: when does newlines get set in universal newlines mode?

2015-05-04 Thread Davide Mancusi

>> I believe this is a bug.
>
> I'm not sure it is, actually; imagine the text is coming in one
> character at a time (eg from a pipe), and it's seen "alpha\r". It
> knows that this is a line, so it emits it; but until the next
> character is read, it can't know whether it's going to be \r or \r\n.
> What should it do? Read another character, which might block? Put "\r"
> into .newlines, which might be wrong? Once it sees the \n, it knows
> that it was \r\n (or rather, it assumes that files do not have lines
> of text terminated by \r followed by blank lines terminated by \n -
> because that would be stupid).

I think this is a good point. However, I will probably submit a bug
report anyway and let the devs make their decisions. It is at least a
documentation bug.

Cheers,
Davide
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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 14:14 CEST schreef Chris Angelico:

> On Mon, May 4, 2015 at 9:32 PM, Cecil Westerhof  wrote:
>>> Does 'pip3 install -U pyOpenSSL' work?
>> Not really, because that gives: Requirement already up-to-date:
>> pyOpenSSL in /usr/lib64/python3.4/site-packages Cleaning up...
>
> I don't know why it wasn't automatically installed, but 'six' is a
> listed dependency of pyOpenSSL. What happens if you try to install
> six?

That gets installed. And then I get:
ImportError: No module named 'cryptography'

So I try to install that. This gives:
Command /usr/bin/python3 -c "import setuptools, 
tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize,
 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" 
install --record /tmp/pip-_7jexj87-record/install-record.txt 
--single-version-externally-managed --compile failed with error code 1 in 
/tmp/pip_build_root/cryptography
Storing debug log for failure in /root/.pip/pip.log

In the log I see:
c/_cffi_backend.c:2:20: fatal error: Python.h: No such file or directory
 #include 
^

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Re: Why do I get SyntaxError: invalid syntax

Op Monday 4 May 2015 14:07 CEST schreef Chris Angelico:

> On Mon, May 4, 2015 at 9:31 PM, Cecil Westerhof  wrote:
>> While copying pasting code to test, the following works: [chomp]
>> But first I used: with NamedTemporaryFile(mode = 'w', prefix = file
>> + '_', dir = filepath, delete = False) as tf: tempfile = tf.name
>> with open(real_file, 'r') as f: for line in islice(f, 1, None):
>> tf.write(line) rename(tempfile, real_file)
>>
>> But that gave:
>> File "", line 6
>> rename(tempfile, real_file)
>> ^
>> SyntaxError: invalid syntax
>>
>> Why?
>
> To clarify: When you say "to test", you mean the interactive
> interpreter, right?

Yes, that is what I mend. Should have been clearer.


> If so, you need to end blocks of text with blank
> lines (and not have any blank lines in between). It's because the
> parser has to know when to run stuff; when you run a script, it
> parses the whole thing and then runs it, but interactively, it has
> to work piece-meal.

OK, thanks: I understand it now.

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Re: Cannot update OpenSSL for Python3

On Mon, May 4, 2015 at 11:13 PM, Cecil Westerhof  wrote:
> That gets installed. And then I get:
> ImportError: No module named 'cryptography'
>
> So I try to install that. This gives:
> Command /usr/bin/python3 -c "import setuptools, 
> tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize,
>  'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" 
> install --record /tmp/pip-_7jexj87-record/install-record.txt 
> --single-version-externally-managed --compile failed with error code 1 in 
> /tmp/pip_build_root/cryptography
> Storing debug log for failure in /root/.pip/pip.log
>
> In the log I see:
> c/_cffi_backend.c:2:20: fatal error: Python.h: No such file or directory
>  #include 

Okay, that one's easy enough to deal with!

You have something that needs to build a C extension. To do that, you
need to have the Python headers installed. How did you install Python?
On Debian/Ubuntu family Linuxes, that's probably "apt-get install
python3" - so getting the headers would be "apt-get install
python3-dev". Give that a try, and then retry the pip install.

ChrisA
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Re: ImportPython Newsletter

2015-05-04 Thread Alex McFerron

I had the same problem just now

Sent from my iPhone

> On May 3, 2015, at 11:00 AM, Terry Reedy  wrote:
> 
>> On 5/3/2015 12:01 PM, Ankur Gupta wrote:
>> Hey Guys,
>> 
>> Just like to draw attention to ImportPython a weekly Python
>> newsletter. This is the 30th issue of the newsletter
>> http://importpython.com/newsletter/no/30/.
> 
> Nice, but when I tried to subscribe,
> "Unable to reach server"
> 
> -- 
> Terry Jan Reedy
> 
> -- 
> https://mail.python.org/mailman/listinfo/python-list
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Re: when does newlines get set in universal newlines mode?

2015-05-04 Thread Peter Otten

Chris Angelico wrote:

> On Mon, May 4, 2015 at 10:01 PM, Peter Otten <[email protected]> wrote:
>> I tried:
>>
> with open("tmp.txt", "wb") as f: f.write("alpha\r\nbeta\rgamma\n")
>> ...
> f = open("tmp.txt", "rU")
> f.newlines
> f.readline()
>> 'alpha\n'
> f.newlines
>> # expected: '\r\n'
> f.readline()
>> 'beta\n'
> f.newlines
>> '\r\n' # expected: ('\r', '\r\n')
> f.readline()
>> 'gamma\n'
> f.newlines
>> ('\r', '\n', '\r\n')
>>
>> I believe this is a bug.
> 
> I'm not sure it is, actually; imagine the text is coming in one
> character at a time (eg from a pipe), and it's seen "alpha\r". It
> knows that this is a line, so it emits it; but until the next
> character is read, it can't know whether it's going to be \r or \r\n.
> What should it do? Read another character, which might block? Put "\r"
> into .newlines, which might be wrong? Once it sees the \n, it knows
> that it was \r\n (or rather, it assumes that files do not have lines
> of text terminated by \r followed by blank lines terminated by \n -
> because that would be stupid).
> 
> It may be worth documenting this limitation, but it's not something
> that can easily be fixed without removing support for \r newlines -
> although that might be an option, given that non-OSX Macs are
> basically history now.

OK, you convinced me. Then I tried:

>>> with open("tmp.txt", "wb") as f: f.write("0\r\n3\r5\n7")
... 
>>> assert len(open("tmp.txt", "rb").read()) == 8
>>> f = open("tmp.txt", "rU")
>>> f.readline()
'0\n'
>>> f.newlines
>>> f.tell()
3
>>> f.newlines
'\r\n'

Hm, so tell() moves the file pointer? Is that sane?

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Re: when does newlines get set in universal newlines mode?

On Tue, May 5, 2015 at 1:17 AM, Peter Otten <[email protected]> wrote:
> OK, you convinced me. Then I tried:
>
 with open("tmp.txt", "wb") as f: f.write("0\r\n3\r5\n7")
> ...
 assert len(open("tmp.txt", "rb").read()) == 8
 f = open("tmp.txt", "rU")
 f.readline()
> '0\n'
 f.newlines
 f.tell()
> 3
 f.newlines
> '\r\n'
>
> Hm, so tell() moves the file pointer? Is that sane?

... wow. Okay! That's a bit weird.

It's possible that something's being done with internal buffering
(after all, it's horribly inefficient to *actually* read text one byte
at a time, even if that's what's happening conceptually), and that
tell() causes some checks to be done. But that really is rather
strange. I'd be interested to know what happens if another process
writes to a pipe "0\r", then sleeps while the readline() and tell()
happen, and then writes a "\n" - what will that do to newlines?

By the way, it's as well to clarify, with all these examples, what
Python version you're using. There may be significant differences.

ChrisA
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Re: when does newlines get set in universal newlines mode?

On Mon, May 4, 2015 at 9:17 AM, Peter Otten <[email protected]> wrote:
> OK, you convinced me. Then I tried:
>
 with open("tmp.txt", "wb") as f: f.write("0\r\n3\r5\n7")
> ...
 assert len(open("tmp.txt", "rb").read()) == 8
 f = open("tmp.txt", "rU")
 f.readline()
> '0\n'
 f.newlines
 f.tell()
> 3
 f.newlines
> '\r\n'
>
> Hm, so tell() moves the file pointer? Is that sane?

If I call readline() followed by tell(), I expect the result to be the
position of the start of the next line. Maybe this is considered safe
because tell() on a pipe raises an exception?
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Bitten by my C/Java experience

Potential dangerous bug introduced by programming in Python as if it
was C/Java. :-(
I used:
++tries
that has to be:
tries += 1

Are there other things I have to be careful on? That does not work as
in C/Java, but is correct syntax.

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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 16:18 CEST schreef Chris Angelico:

> On Mon, May 4, 2015 at 11:13 PM, Cecil Westerhof  wrote:
>> That gets installed. And then I get:
>> ImportError: No module named 'cryptography'
>>
>> So I try to install that. This gives: Command /usr/bin/python3 -c
>> "import setuptools,
>> tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize,
>> 'open', open)(__file__).read().replace('\r\n', '\n'), __file__,
>> 'exec'))" install --record
>> /tmp/pip-_7jexj87-record/install-record.txt
>> --single-version-externally-managed --compile failed with error
>> code 1 in /tmp/pip_build_root/cryptography Storing debug log for
>> failure in /root/.pip/pip.log
>>
>> In the log I see: c/_cffi_backend.c:2:20: fatal error: Python.h: No
>> such file or directory #include 
>
> Okay, that one's easy enough to deal with!
>
> You have something that needs to build a C extension. To do that,
> you need to have the Python headers installed. How did you install
> Python? On Debian/Ubuntu family Linuxes, that's probably "apt-get
> install python3" - so getting the headers would be "apt-get install
> python3-dev". Give that a try, and then retry the pip install.

I should have thought about that myself. :-(

Now I get:
c/../_cffi1/ffi_obj.c:489:5: error: ISO C90 forbids mixed declarations and 
code [-Werror=declaration-after-statement]
 PyObject *u = PyUnicode_DecodeLatin1(PyBytes_AS_STRING(res),
 ^
cc1: some warnings being treated as errors

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Re: Cannot update OpenSSL for Python3

On Tue, May 5, 2015 at 1:11 AM, Cecil Westerhof  wrote:
> Now I get:
> c/../_cffi1/ffi_obj.c:489:5: error: ISO C90 forbids mixed declarations 
> and code [-Werror=declaration-after-statement]
>  PyObject *u = PyUnicode_DecodeLatin1(PyBytes_AS_STRING(res),
>  ^
> cc1: some warnings being treated as errors

Interesting. I'm not sure why yours is complaining about that; mine
doesn't. (Possibly because I'm running Python 3.5, and stuff may have
been changed.) In any case, this would be a reasonable thing to make a
bug report about. In the meantime, you can simply override that
warning-equals-error parameter:

http://stackoverflow.com/questions/25587039/error-compiling-rpy2-on-python3-4-due-to-werror-declaration-after-statement

ChrisA
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Re: Bitten by my C/Java experience

2015-05-04 Thread Tobiah


On 05/04/2015 08:20 AM, Cecil Westerhof wrote:

Potential dangerous bug introduced by programming in Python as if it
was C/Java. :-(
I used:
 ++tries
that has to be:
 tries += 1

Are there other things I have to be careful on? That does not work as
in C/Java, but is correct syntax.



One surprise for the new user is an otherwise handy rule of scope.
A variable in a function will by default access any global variables of
the same name *unless* it is assigned to in the function.

def glob():
print "global:", foo

def loc():
foo = 2
print "local:", foo

def alt():
global foo
foo = 1
print "altered:", foo

foo = 3

glob()
print "Original:", foo

loc()
print "Original:", foo

alt()
print "Original:", foo

# Output ##

global: 3
Original: 3
local: 2
Original: 3
altered: 1
Original: 1
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Re: Bitten by my C/Java experience

2015-05-04 Thread Irmen de Jong

On 4-5-2015 17:20, Cecil Westerhof wrote:
> Potential dangerous bug introduced by programming in Python as if it
> was C/Java. :-(
> I used:
> ++tries
> that has to be:
> tries += 1
> 
> Are there other things I have to be careful on? That does not work as
> in C/Java, but is correct syntax.
> 

That is a broad question, but one thing that comes to mind is the current 
(python 3)
behavior of integer division. It gives the exact result and doesn't truncate to 
integers:

>>> 5/4
1.25

To be prepared for the future you should probably use python's time machine and 
enable
this behavior for 2.x as well by from __future__ import division.

Another thing is that functions are first class citizens in Python. Java will 
give a
compiler error if you forget to call them and leave out the parentheses (I 
think Java 8
allows it though). Python will accept passing them on as a function object just 
fine. If
you do this by mistake you will probably get an exception a tiny bit down the 
line, at
runtime. But it is syntactically correct so your code will compile without 
error.

-irmen

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Re: when does newlines get set in universal newlines mode?

2015-05-04 Thread Terry Reedy


On 5/4/2015 9:35 AM, Davide Mancusi wrote:

I believe this is a bug.


I'm not sure it is, actually; imagine the text is coming in one
character at a time (eg from a pipe), and it's seen "alpha\r". It
knows that this is a line, so it emits it; but until the next
character is read, it can't know whether it's going to be \r or \r\n.
What should it do? Read another character, which might block? Put "\r"
into .newlines, which might be wrong? Once it sees the \n, it knows
that it was \r\n (or rather, it assumes that files do not have lines
of text terminated by \r followed by blank lines terminated by \n -
because that would be stupid).


I think this is a good point. However, I will probably submit a bug
report anyway and let the devs make their decisions. It is at least a
documentation bug.


Be sure to report the exact python binary you are using, as reported 
when you start the interactive interpreter or Idle shell.


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Re: Bitten by my C/Java experience

On Tue, May 5, 2015 at 3:32 AM, Irmen de Jong  wrote:
> That is a broad question, but one thing that comes to mind is the current 
> (python 3)
> behavior of integer division. It gives the exact result and doesn't truncate 
> to integers:
>
>
 5/4
> 1.25

Using the word "exact" around non-integer values can be a little
ambiguous, since floats are often inexact. But yes, int/int -> float,
and yes, it WILL bite C programmers.

ChrisA
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Re: Bitten by my C/Java experience

On Mon, May 4, 2015 at 9:20 AM, Cecil Westerhof  wrote:
> Potential dangerous bug introduced by programming in Python as if it
> was C/Java. :-(
> I used:
> ++tries
> that has to be:
> tries += 1
>
> Are there other things I have to be careful on? That does not work as
> in C/Java, but is correct syntax.

Some other gotchas that aren't necessarily related to C/Java but can
be surprising nonetheless:

*() is a zero-element tuple, and (a, b) is a two-element tuple,
but (a) is not a one-element tuple. Tuples are created by commas, not
parentheses, so use (a,) instead.

*Default function arguments are created at definition time, not at
call time. So if you do something like:

def foo(a, b=[]):
b.append(a)
print(b)

The b list will be the same list on each call and will retain all
changes from previous calls.

*super() doesn't do what you might expect in multiple inheritance
situations, particularly if you're coming from Java where you never
have to deal with multiple inheritance. It binds to the next class in
the method resolution order, *not* necessarily the immediate
superclass. This also means that the particular class bound to can
vary depending on the specific class of the object.

*[[None] * 8] * 8 doesn't create a 2-dimensional array of None. It
creates one list containing None 8 times, and then it creates a second
list containing the first list 8 times, *not* a list of 8 distinct
lists.

*If some_tuple is a tuple containing a list, then some_tuple[0] +=
['foo'] will concatenate the list *but* will also raise a TypeError
when it tries to reassign the list back to the tuple.
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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 18:03 CEST schreef Chris Angelico:

> On Tue, May 5, 2015 at 1:11 AM, Cecil Westerhof  wrote:
>> Now I get: c/../_cffi1/ffi_obj.c:489:5: error: ISO C90 forbids
>> mixed declarations and code [-Werror=declaration-after-statement]
>> PyObject *u = PyUnicode_DecodeLatin1(PyBytes_AS_STRING(res), ^ cc1:
>> some warnings being treated as errors
>
> Interesting. I'm not sure why yours is complaining about that; mine
> doesn't. (Possibly because I'm running Python 3.5, and stuff may
> have been changed.) In any case, this would be a reasonable thing to
> make a bug report about. In the meantime, you can simply override
> that warning-equals-error parameter:
>
> http://stackoverflow.com/questions/25587039/error-compiling-rpy2-on-python3-4-due-to-werror-declaration-after-statement

It looks like I am encircled by Gremlins:
>>> import urllib3.contrib.pyopenssl
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", 
line 58, in 
from socket import _fileobject, timeout
ImportError: cannot import name '_fileobject'

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Re: Cannot update OpenSSL for Python3

On Tue, May 5, 2015 at 3:19 AM, Cecil Westerhof  wrote:
> It looks like I am encircled by Gremlins:
> >>> import urllib3.contrib.pyopenssl
> Traceback (most recent call last):
>   File "", line 1, in 
>   File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", 
> line 58, in 
> from socket import _fileobject, timeout
> ImportError: cannot import name '_fileobject'

This is looking like a pyopenssl bug - I can't import that name
either, and given that it has the leading underscore, it's probably
not an official part of the socket module's API.

ChrisA
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Re: Bitten by my C/Java experience

2015-05-04 Thread Mark Lawrence


On 04/05/2015 16:20, Cecil Westerhof wrote:

Potential dangerous bug introduced by programming in Python as if it
was C/Java. :-(
I used:
 ++tries
that has to be:
 tries += 1

Are there other things I have to be careful on? That does not work as
in C/Java, but is correct syntax.



Not dangerous at all, your test code picks it up.  I'd also guess, but 
don't actually know, that one of the various linter tools could be 
configured to find this problem.


--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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Re: Cannot update OpenSSL for Python3

2015-05-04 Thread Mark Lawrence

On 04/05/2015 16:11, Cecil Westerhof wrote:

Op Monday 4 May 2015 16:18 CEST schreef Chris Angelico:

On Mon, May 4, 2015 at 11:13 PM, Cecil Westerhof wrote:

That gets installed. And then I get:
ImportError: No module named 'cryptography'

So I try to install that. This gives: Command /usr/bin/python3 -c
"import setuptools,
tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize,
'open', open)(__file__).read().replace('\r\n', '\n'), __file__,
'exec'))" install --record
/tmp/pip-_7jexj87-record/install-record.txt
--single-version-externally-managed --compile failed with error
code 1 in /tmp/pip_build_root/cryptography Storing debug log for
failure in /root/.pip/pip.log

In the log I see: c/_cffi_backend.c:2:20: fatal error: Python.h: No
such file or directory #include

Okay, that one's easy enough to deal with!

You have something that needs to build a C extension. To do that,
you need to have the Python headers installed. How did you install
Python? On Debian/Ubuntu family Linuxes, that's probably "apt-get
install python3" - so getting the headers would be "apt-get install
python3-dev". Give that a try, and then retry the pip install.

I should have thought about that myself. :-(

An alternative is to switch to Windows and do away with this archaic
concept of users having to build code :)

--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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ANN: Wing IDE 5.1.4 released

2015-05-04 Thread Wingware


Hi,

Wingware has released version 5.1.4 of Wing IDE, our cross-platform 
integrated development environment for the Python programming language.


Wing IDE features a professional code editor with vi, emacs, visual 
studio, and other key bindings, auto-completion, call tips, 
context-sensitive auto-editing, goto-definition, find uses, refactoring, 
a powerful debugger, version control, unit testing, search, project 
management, and many other features.


This release includes the following improvements:

Find Symbol in Project dialog
Support Django 1.8
Support debugging Django with auto-reload enabled
Basic support for Python 3.5 alpha
Change Case operations to Source menu
Fix alignment of monospaced characters on OS X and Linux
Improve pytest support
Fix several code analysis problems
About 40 other bug fixes and improvements

For details see http://wingware.com/news/2015-05-01 and 
http://wingware.com/pub/wingide/5.1.4/CHANGELOG.txt


What's New in Wing 5.1:

Wing IDE 5.1 adds multi-process and child process debugging, syntax 
highlighting in the shells, support for pytest, Find Symbol in Project, 
persistent time-stamped unit test results, auto-conversion of indents on 
paste, an XCode keyboard personality, support for Flask, Django 1.7 and 
1.8, Python 3.5 and recent Google App Engine versions, improved 
auto-completion for PyQt, recursive snippet invocation, and many other 
minor features and improvements.


Free trial: http://wingware.com/wingide/trial
Downloads: http://wingware.com/downloads
Feature list: http://wingware.com/wingide/features
Sales: http://wingware.com/store/purchase
Upgrades: https://wingware.com/store/upgrade

Questions?  Don't hesitate to email us at [email protected].

Thanks,

--

Stephan Deibel
Wingware | Python IDE

The Intelligent Development Environment for Python Programmers

wingware.com


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Re: Cannot update OpenSSL for Python3

2015-05-04 Thread Irmen de Jong

On 4-5-2015 19:19, Cecil Westerhof wrote:

> It looks like I am encircled by Gremlins:
> >>> import urllib3.contrib.pyopenssl
> Traceback (most recent call last):
>   File "", line 1, in 
>   File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", 
> line 58, in 
> from socket import _fileobject, timeout
> ImportError: cannot import name '_fileobject'
> 

Looks to me as if you have installed a Python 2 version of urllib3? pyopenssl? 
and are
trying to run that under python 3.

(socket module in python 2 does have a _fileobject, whereas in python 3 it no 
longer has
it.  Checked in CPython on Windows.)

Irmen

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Why from en to two times with sending email

I want to change an old Bash script to Python. When I look at:
https://docs.python.org/2/library/email-examples.html

Then from and to have to be used two times? Why is that?

-- 
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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: Bitten by my C/Java experience

On Mon, May 4, 2015 at 11:59 AM, Mark Lawrence  wrote:
> On 04/05/2015 16:20, Cecil Westerhof wrote:
>>
>> Potential dangerous bug introduced by programming in Python as if it
>> was C/Java. :-(
>> I used:
>>  ++tries
>> that has to be:
>>  tries += 1
>>
>> Are there other things I have to be careful on? That does not work as
>> in C/Java, but is correct syntax.
>>
>
> Not dangerous at all, your test code picks it up.  I'd also guess, but don't
> actually know, that one of the various linter tools could be configured to
> find this problem.

pylint reports it as an error.
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Re: Why from en to two times with sending email

On Mon, May 4, 2015 at 12:59 PM, Cecil Westerhof  wrote:
> I want to change an old Bash script to Python. When I look at:
> https://docs.python.org/2/library/email-examples.html
>
> Then from and to have to be used two times? Why is that?

Once to construct the message headers, and once to instruct the SMTP
server where to send the message. These are not required to agree; for
instance, bcc recipients need to be supplied to the server but aren't
included in the headers.
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Re: Bitten by my C/Java experience

2015-05-04 Thread Terry Reedy


On 5/4/2015 1:43 PM, Ian Kelly wrote:


*() is a zero-element tuple, and (a, b) is a two-element tuple,
but (a) is not a one-element tuple. Tuples are created by commas, not
parentheses, so use (a,) instead.


Which means that a, and a,b (or a,b,) are 1 and 2 element tuples 
respectively. Except for empty tuples, parentheses are optional unless 
needed to fence off the tuple from surrounding code (which happens to be 
most of the time, but not always).  A trailing comma is prohibited for 
zero element tuples, required for one element tuples, and optional for 
multiple element tuples.


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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 20:04 CEST schreef Mark Lawrence:

> An alternative is to switch to Windows and do away with this archaic
> concept of users having to build code :)

Well, maybe I get rid of some problems. But the ones I get back …

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Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: Cannot update OpenSSL for Python3

Op Monday 4 May 2015 21:02 CEST schreef Irmen de Jong:

> On 4-5-2015 19:19, Cecil Westerhof wrote:
>
>> It looks like I am encircled by Gremlins:
> import urllib3.contrib.pyopenssl
>> Traceback (most recent call last): File "", line 1, in
>>  File
>> "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py",
>> line 58, in  from socket import _fileobject, timeout
>> ImportError: cannot import name '_fileobject'
>>
>
> Looks to me as if you have installed a Python 2 version of urllib3?
> pyopenssl? and are trying to run that under python 3.
>
> (socket module in python 2 does have a _fileobject, whereas in
> python 3 it no longer has it. Checked in CPython on Windows.)

I did an uninstall and installed it again:
pip3 install urllib3
Downloading/unpacking urllib3
  Downloading urllib3-1.10.4.tar.gz (138kB): 138kB downloaded
  Running setup.py (path:/tmp/pip_build_root/urllib3/setup.py) egg_info for 
package urllib3

warning: no previously-included files matching '*' found under 
directory 'docs/_build'
Installing collected packages: urllib3
  Running setup.py install for urllib3

warning: no previously-included files matching '*' found under 
directory 'docs/_build'
Successfully installed urllib3
Cleaning up...

But I keep getting the error. Only 2 lines earlier:
>>> import urllib3.contrib.pyopenssl
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", 
line 56, in 
from socket import _fileobject, timeout
ImportError: cannot import name '_fileobject'

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Re: Bitten by my C/Java experience

Op Monday 4 May 2015 21:39 CEST schreef Ian Kelly:

> On Mon, May 4, 2015 at 11:59 AM, Mark Lawrence  
> wrote:
>> On 04/05/2015 16:20, Cecil Westerhof wrote:
>>>
>>> Potential dangerous bug introduced by programming in Python as if
>>> it was C/Java. :-( I used: ++tries that has to be: tries += 1
>>>
>>> Are there other things I have to be careful on? That does not work
>>> as in C/Java, but is correct syntax.
>>>
>>
>> Not dangerous at all, your test code picks it up. I'd also guess,
>> but don't actually know, that one of the various linter tools could
>> be configured to find this problem.
>
> pylint reports it as an error.

I installed it. Get a lot of messages. Mostly convention. For example:
Unnecessary parens after 'print' keyword

And:
Invalid variable name "f"
for:
with open(real_file, 'r') as f:

But still something to add to my toolbox.

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Re: Cannot update OpenSSL for Python3

2015-05-04 Thread Mark Lawrence


On 04/05/2015 09:58, Cecil Westerhof wrote:

But when I do:
 import urllib3.contrib.pyopenssl
I get:
 Traceback (most recent call last):
   File "", line 1, in 
   File "/usr/lib/python3.4/site-packages/urllib3/contrib/pyopenssl.py", line 55, 
in 
 import OpenSSL.SSL
   File "/usr/lib64/python3.4/site-packages/OpenSSL/__init__.py", line 8, in 

 from OpenSSL import rand, crypto, SSL
   File "/usr/lib64/python3.4/site-packages/OpenSSL/rand.py", line 9, in 

 from six import integer_types as _integer_types
 ImportError: No module named 'six'

When I then give:
 pip3 install -U OpenSSL
It goes wrong:
 Could not fetch URL https://pypi.python.org/simple/OpenSSL/: 404 Client 
Error: Not Found

I checked and even
 https://pypi.python.org/simple/
does not exist. Anyone an idea what is happening here?



Showing my complete ignorance of *nix, what is the difference betweeen 
"/usr/lib/python3.4/..." and "/usr/lib64/python3.4/..."?  Simply 32 
versus 64 bit, which can or can't be mixed, or what?


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what you can do for our language.

Mark Lawrence

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Updating FaceBook

Using Python to update Twitter is reasonable straight forward.
I do:
from libturpial.api.coreimport Core
from libturpial.exceptions  import StatusDuplicated

I fill an account_id and a message and I do:
Core().update_status(account_id, message)

And my message is posted.

It looks like there is not something like that for FaceBook.  I found:
https://github.com/pythonforfacebook/facebook-sdk
but that looks not easy to implement. Is there an easier way?

In the past you could send an email, but that seems not to work
anymore.

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Re: Why from en to two times with sending email