Re: python readline module

[ludo@gnu.org (Ludovic Courtès)]

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?

Ludo’.