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Re: matplotlib broken
From: |
Ludovic Courtès |
Subject: |
Re: matplotlib broken |
Date: |
Tue, 16 Jun 2015 13:50:28 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Federico Beffa <address@hidden> skribis:
> address@hidden (Ludovic Courtès) writes:
>
>> I don’t know if I’m missing something, but when I type ‘matplotlib’ at
>> the prompt, I get:
>>
>> /gnu/store/g4m8q73cq4lym3v1ag7pnk5zv49mdifs-python-matplotlib-1.4.2/lib/python3.4/site-packages/matplotlib-1.4.2-py3.4-linux-x86_64.egg/matplotlib/backends/backend_gtk3.py
>> in <module>()
>> 19 except ValueError:
>> 20 raise ImportError(
>> ---> 21 "Gtk3 backend requires the GObject introspection bindings
>> for Gtk 3 "
>> 22 "to be installed.")
>> 23
>>
>> ImportError: Gtk3 backend requires the GObject introspection bindings for
>> Gtk 3 to be installed.
>>
>> This may well be related to <http://bugs.gnu.org/20765>: Because Guix
>> has incomplete dependency information, it might GC some of the things
>> that these eggs refer to, and so things may or may not work depending on
>> whether they have been GC’d.
>
> To solve this error I think you need to set
> export GI_TYPELIB_PATH="$HOME/.guix-profile/lib/girepository-1.0"
> We should probably add a search path specification for that.
Oh right. It’s actually in gobject-introspection, which makes sense but
is inconvenient in this case. Not sure how to handle it.
> For me it does display a window as expected, but it doesn't show the
> curve (line in this case).
Indeed, in:
guix environment --pure --ad-hoc gobject-introspection pango gtk+
python-ipython -E ipython
I get the behavior you describe, and the console shows alarming
warnings like:
TypeError: Couldn't find foreign struct converter for 'cairo.Context'
which explains the blank page, I guess. If Python’s FFI uses GIR files,
then that’s probably because it couldn’t find Cairo’s GIR files in
$GI_TYPELIB_PATH?
My 2¢,
Ludo’.