tst_plt.py doesn't work for me

[victorclaessen]

Hi,

I can't get the ''tst_plt.py'' example to work. Log below:

root@kivy:/home/victor/garden# python tst_plt.py
[INFO   ] [Logger      ] Record log in /root/.kivy/logs/kivy_18-09-26_24.txt
[INFO   ] [Kivy        ] v1.11.0.dev0, git-f679b7b, 20180926
[INFO   ] [Python      ] v2.7.13 (default, Nov 24 2017, 17:33:09)
[GCC 6.3.0 20170516]
[INFO   ] [Factory     ] 195 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_pygame, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: pygame
[INFO   ] [Window      ] Provider: pygame(['window_egl_rpi'] ignored)
[WARNING] [WinPygame   ] Video: failed (multisamples=2)
[WARNING] [WinPygame   ] trying without antialiasing
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] Backend used <gl>
[INFO   ] [GL          ] OpenGL version <3.0 Mesa 13.0.6>
[INFO   ] [GL          ] OpenGL vendor <VMware, Inc.>
[INFO   ] [GL          ] OpenGL renderer <Gallium 0.4 on llvmpipe (LLVM 3.9, 128 bits)>
[INFO   ] [GL          ] OpenGL parsed version: 3, 0
[INFO   ] [GL          ] Shading version <1.30>
[INFO   ] [GL          ] Texture max size <8192>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [GL          ] NPOT texture support is available
 /root/.kivy/garden/garden.matplotlib/backend_kivy.py:669: MatplotlibDeprecationWarning: The weight_as_number function was deprecated in version 2.1.
   if weight_as_number(prop.get_weight()) > 500:
 Traceback (most recent call last):
   File "tst_plt.py", line 100, in <module>
	 plt.show()
   File "/usr/local/lib/python2.7/dist-packages/matplotlib/pyplot.py", line 253, in show
	 return _show(*args, **kw)
   File "/usr/local/lib/python2.7/dist-packages/matplotlib/backend_bases.py", line 240, in __call__
	 return self.show(block=block)
   File "/usr/local/lib/python2.7/dist-packages/matplotlib/backend_bases.py", line 208, in show
	 cls.mainloop()
 TypeError: unbound method mainloop() must be called with Show instance as first argument (got nothing instead)

[mcu101]

Hi Victor, have you tried running the examples with matplotlib 2.0.0? The Kivy Garden matplotlib integration is currently not compatible with matplotlib versions 2.1 to the latest 3.0.0 because backend_kivy.py calls weight_as_number() which was deprecated in matplotlib 2.1.

Try running the examples on a virtual environment with matplotlib 2.0.0. You can install it by running:

python -m pip install -U --force-reinstall matplotlib==2.0.0

[victorclaessen]

That worked. Thanks!

Just out of curiosity: is that the weight_as_number() deprecation the only thing preventing the use of newer versions of matplotlib? Is that hard to fix?

[matham]

The weight thing has already been fixed. Give master a try and let us know (with a new issue) if it's still broken.