Re: python readline module

[Federico Beffa <beffa@ieee.org>]

On Sun, Dec 20, 2015 at 11:38 PM, Ludovic Courtès <ludo@gnu.org> wrote:
> Federico Beffa <beffa@ieee.org> skribis:
>
>> it appears that our 'python' package, despite having 'readline' among
>> its inputs, can't use it:
>
> It Works for Me:
>
> --8<---------------cut here---------------start------------->8---
> $ guix environment --container --ad-hoc python -- python3
> substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100.0%
> La jenaj derivoj estos elŝutataj:
>    /gnu/store/13n8xbi9wv9pigfyhir007qadr81jq46-python-3.4.3
>    /gnu/store/s8icyyyqb6f82krh95y4kzlgv32vwshb-python-3.4.3-tk
>
> Found valid signature for /gnu/store/s8icyyyqb6f82krh95y4kzlgv32vwshb-python-3.4.3-tk
> From http://hydra.gnu.org/nar/s8icyyyqb6f82krh95y4kzlgv32vwshb-python-3.4.3-tk
> Downloading s8icyy…-python-3.4.3-tk (71KiB installed)...
>  http://hydra.gnu.org/nar/s8icyyyqb6f82krh95y4kzlgv32vwshb-python-3.4.3-tk 156KiB/s 00:00 | 25KiB transferred
> Python 3.4.3 (default, Jan  1 1970, 00:00:01)
> [GCC 4.9.3] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import readline
>>>>
> Error in atexit._run_exitfuncs:
> FileNotFoundError: [Errno 2] No such file or directory
> $ guix environment --container --ad-hoc python-2 -- python
> Python 2.7.10 (default, Jan  1 1970, 00:00:01)
> [GCC 4.9.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import readline
>>>>
> --8<---------------cut here---------------end--------------->8---
>
> Could it be that something in the environment is interfering?  Maybe
> PYTHONPATH pointing to an incompatible readline.so?


Thanks for checking!

The problem appears to be that installing 'python-wrapper' brings
in 'python-minimal' instead of 'python':

$ guix environment --pure --ad-hoc python-wrapper -- python
guix environment: warning: ambiguous package specification `python-wrapper'
guix environment: warning: choosing python-wrapper-3.4.3 from
gnu/packages/python.scm:312:2
Python 3.4.3 (default, Jan  1 1970, 00:00:01)
[GCC 4.9.3] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/gnu/store/0rjhns4h747zxx4ya85bbnkjw6dz617m-python-minimal-3.4.3/lib/python3.4/site-packages',
'/gnu/store/0rjhns4h747zxx4ya85bbnkjw6dz617m-python-minimal-3.4.3/lib/python34.zip',
'/gnu/store/0rjhns4h747zxx4ya85bbnkjw6dz617m-python-minimal-3.4.3/lib/python3.4',
'/gnu/store/0rjhns4h747zxx4ya85bbnkjw6dz617m-python-minimal-3.4.3/lib/python3.4/plat-linux',
'/gnu/store/0rjhns4h747zxx4ya85bbnkjw6dz617m-python-minimal-3.4.3/lib/python3.4/lib-dynload']
>>> import readline
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'readline'
>>>

Regards,
Fede