Repository navigation
Can't import matplotlib #12601
Description
Bug report
Bug summary
Importing matplotlib fails with ImportError: cannot import name 'get_backend' from 'matplotlib'.
Code for reproduction
import matplotlibActual outcome
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.7/site-packages/matplotlib/__init__.py", line 1080, in <module>
rcParamsOrig = RcParams(rcParams.copy())
File "/usr/lib/python3.7/site-packages/matplotlib/__init__.py", line 870, in __getitem__
from matplotlib import pyplot as plt
File "/usr/lib/python3.7/site-packages/matplotlib/pyplot.py", line 33, in <module>
import matplotlib.image
File "/usr/lib/python3.7/site-packages/matplotlib/image.py", line 18, in <module>
from matplotlib.backend_bases import FigureCanvasBase
File "/usr/lib/python3.7/site-packages/matplotlib/backend_bases.py", line 46, in <module>
from matplotlib import (
ImportError: cannot import name 'get_backend' from 'matplotlib' (/usr/lib/python3.7/site-packages/matplotlib/__init__.py)
Expected outcome
Matplotlib is imported
Matplotlib version
- Operating system: GNU/Linux
- Matplotlib version: 3.0 git master
- Python version: 3.7.1
Python from Arch repo, matplotlib from git master.
Activity
anntzer commentedon Oct 23, 2018
I can repro with 3.7.1 (one needs to not have a matplotlibrc to repro, this can be done e.g. by pointing MPLCONFIGDIR to an empty directory).
I think(??) this is likely due to python/cpython@d45a961 (specifically python/cpython@d45a961#diff-2131209d0deb0e50c93a88ec6c7b0d52R2487) which makes RcParams.copy now use our own
__getitem__instead of skipping it.ArchangeGabriel commentedon Oct 23, 2018
I can confirm by building from master branch in a clean chroot, during the tests part:
QuLogic commentedon Oct 23, 2018
CI is also failing on this same issue.
tacaswell commentedon Oct 23, 2018
Oh, that is exciting....
tacaswell commentedon Oct 23, 2018
I clearly have not been doing enough development work recently as I missed this in my all-the-master-branch enviroment 😞
FIX: over-ride 'copy' on RcParams