Bug#864599: python-minimal: pyclean, pycompile and pyversions: Error when /usr/bin/python is python3

2017-06-11 Thread Matthias Julius 
Am 11.06.2017 um 12:35 schrieb Piotr Ozarowski:
> Control: severity 864599 wishlist
> 
> [Matthias Julius, 2017-06-11]
> 
> /usr/bin/python is not something you should be changing via alternatives

Why not?  Can there be no legitimate reason for wanting python3 to be
the default python?

>>   File "/usr/bin/pyclean", line 63
>> except (IOError, OSError), e:
>>  ^
>> SyntaxError: invalid syntax
> 
> if you want Python 3 version of these scripts, use py3compile / py3clean

This is not the point.  Debconf's install script is apparently using
them and they fail if python3 is the default.  This makes debconf
uninstallable.  I don't think this is a bug in debconf.

>> #! /usr/bin/python2
>>
>> helped. They are apparently not compatible with python3.
> 
> I'm not a fan of python2 - we'll not change /usr/bin/python to
> something else than Python 2.X so there's no need to change shebangs.

python-policy 2.4.1 says:

"Python scripts that require the default Python 2 version should specify
python2 as the interpreter name."

While that does not say "must" it is still a strong recommendation.  And
I would also consider that good practice - especially if the fix is so easy.

So while this is no policy violation, to me it is more than a "nice to
have".  But, I will leave it up to you to decide on the proper severity.

Bug#864599: python-minimal: pyclean, pycompile and pyversions: Error when /usr/bin/python is python3

2017-06-11 Thread Piotr Ozarowski 
Control: severity 864599 wishlist

[Matthias Julius, 2017-06-11]
> After setting /usr/bin/python to point to python3 via alternatives the
> next update of debconf failed with:

/usr/bin/python is not something you should be changing via alternatives

>   File "/usr/bin/pyclean", line 63
> except (IOError, OSError), e:
>  ^
> SyntaxError: invalid syntax

if you want Python 3 version of these scripts, use py3compile / py3clean

> #! /usr/bin/python2
> 
> helped. They are apparently not compatible with python3.

I'm not a fan of python2 - we'll not change /usr/bin/python to
something else than Python 2.X so there's no need to change shebangs.

/usr/bin/python2 symlink is provided only to workaround damage done by
one other distro.

Bug#864599: python-minimal: pyclean, pycompile and pyversions: Error when /usr/bin/python is python3

2017-06-11 Thread Matthias Julius 
Package: python-minimal
Version: 2.7.13-2
Severity: normal

Dear Maintainer,

After setting /usr/bin/python to point to python3 via alternatives the
next update of debconf failed with:

  File "/usr/bin/pyclean", line 63
except (IOError, OSError), e:
 ^
SyntaxError: invalid syntax

and

  File "/usr/bin/pycompile", line 35, in 
from debpython.version import SUPPORTED, debsorted, vrepr, \
  File "/usr/share/python/debpython/version.py", line 24, in 
from ConfigParser import SafeConfigParser
ImportError: No module named 'ConfigParser'

pyversions also fails with:

  File "/usr/bin/pyversions", line 20
except IOError, msg:
  ^
SyntaxError: invalid syntax


Changing the first line of all scripts to

#! /usr/bin/python2

helped. They are apparently not compatible with python3.

Best regards,
Matthias


-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-2-amd64 (SMP w/1 CPU core)
Shell: /bin/sh linked to /bin/dash
Init:  systemd (via /run/systemd/system)

Versions of packages python-minimal depends on:
ii  dpkg   1.18.24
ii  python2.7-minimal  2.7.13-2

Versions of packages python-minimal recommends:
ii  python 2.7.13-2

python-minimal suggests no packages.

-- debconf information excluded