bug#71567: python tkinter library not found in guix shell

bug#71567: python tkinter library not found in guix shell

[timotheemathieu--- via Bug reports for GNU Guix]

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Hello,



I want to use guix shell for development environment with python, and more precisely, I want to usethe  tkinter library in python. 

According to https://issues.guix.gnu.org/20889 I believed that tkinter should be automatically included into python but when I launch 



guix shell -CN  python tk tcl -- python3 -m tkinter



I get



Traceback (most recent call last):
  File "/gnu/store/1w5v338qk5m8khcazwclprs3znqp6f7f-python-3.10.7/lib/python3.10/runpy.py", line 187, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/gnu/store/1w5v338qk5m8khcazwclprs3znqp6f7f-python-3.10.7/lib/python3.10/runpy.py", line 146, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/gnu/store/1w5v338qk5m8khcazwclprs3znqp6f7f-python-3.10.7/lib/python3.10/runpy.py", line 110, in _get_module_details
    __import__(pkg_name)
  File "/gnu/store/1w5v338qk5m8khcazwclprs3znqp6f7f-python-3.10.7/lib/python3.10/tkinter/__init__.py", line 37, in <module>
    import _tkinter # If this fails your Python may not be configured for Tk
ModuleNotFoundError: No module named '_tkinter'



whereas, python3 -m tkinter works perfectly well on the host OS (which is a foreign os, not guix-SD). I did a guix pull pretty recently, guix is up to date.



Is this a bug or is there a specific way to install python so that we get tkinter at the same time ? 



Thanks.



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bug#71567: python tkinter library not found in guix shell

[Tobias Geerinckx-Rice via Bug reports for GNU Guix]

Hi Timothee,

On 15 June 2024 10:22:32 UTC, timotheemathieu--- via Bug reports for GNU Guix <bug-guix@gnu.org> wrote:
>According to https://issues.guix.gnu.org/20889 I believed that tkinter should be automatically included into python

Not quite.  Quoting Ludo' in that thread:

  "I think we should move tkinter*.so to a separate output of the Python packages"

And indeed:

  ~ λ guix show python
  name: python
  version: 3.10.7
  outputs:
  + tk: [description missing]
  + idle: [description missing]
  + out: everything else
  [...]

So there's no bug, you just never included tkinter in your environment when you thought you had.

Iinstead of

>guix shell -CN  python tk tcl -- python3 -m tkinter

try

  ~ λ guix shell -CN python{,:tk} -- python3 -m tkinter

'python{,:tk}' is bash shorthand that expands to 'python python:tk'.

I get a $DISPLAY error because this machine doesn't run X, but that implies success, right?



Kind regards,

T G-R

Sent on the go.  Excuse or enjoy my brevity.