AttributeError: module 'matplotlib' has no attribute 'backends' #18022
Description
Bug report
Bug summary
Switching backends using matplotlib v3.3.0 fails for custom backend. I have a custom backend developed for matplotlib. Which is used to get state of the current figure data. Before v3.3.0, I used MPLBACKEND env variable to switch backends. This fails in v3.3.0 it fails with the following error message:
File "/path/to/conda/python3.7/site-packages/matplotlib/pyplot.py", line 283, in switch_backend
matplotlib.backends.backend = newbackend
AttributeError: module 'matplotlib' has no attribute 'backends'Code for reproduction
$ export MPLBACKEND=module://my_custom_backendPython 3.7.4 (default, Aug 13 2019, 20:35:49)
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> matplotlib.__version__
'3.3.0'
>>> from matplotlib import pyplot as plt
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/umesh/anaconda3/lib/python3.7/site-packages/matplotlib/pyplot.py", line 2319, in <module>
switch_backend(rcParams["backend"])
File "/home/umesh/anaconda3/lib/python3.7/site-packages/matplotlib/pyplot.py", line 283, in switch_backend
matplotlib.backends.backend = newbackend
AttributeError: module 'matplotlib' has no attribute 'backends'
>>> Actual outcome
AttributeError: module 'matplotlib' has no attribute 'backends'Matplotlib version
- Operating system: (Linux Mint 19.3 Tricia)
- Matplotlib version: 3.3.0
- Matplotlib backend : Problem with switching backend
- Python version: 3.7