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Title: ENH: allow matplotlib.use after getbackend by jklymak · Pull Request #12608 · matplotlib/matplotlib · GitHub

Open Graph Title: ENH: allow matplotlib.use after getbackend by jklymak · Pull Request #12608 · matplotlib/matplotlib

X Title: ENH: allow matplotlib.use after getbackend by jklymak · Pull Request #12608 · matplotlib/matplotlib

Description: PR Summary Closes the long-desired ability to just call matplotlib.use so long as another GUI backend hasn't been started: Closes #12362 (for example) import matplotlib import matplotlib.pyplot as plt matplotlib.use('Qt5Agg') print('backend:', matplotlib.get_backend()) if not matplotlib.get_backend() == 'MacOSX': matplotlib.use('MacOSX') print('backend:', matplotlib.get_backend()) plt.plot(range(10)) plt.show() matplotlib.use('Qt5Agg') With this PR: $ pythonw testgetbackend.py backend: Qt5Agg backend: MacOSX Traceback (most recent call last): File "testgetbackend.py", line 11, in matplotlib.use('Qt5Agg') File "/Users/jklymak/matplotlib/lib/matplotlib/__init__.py", line 1355, in use switch_backend(name) File "/Users/jklymak/matplotlib/lib/matplotlib/pyplot.py", line 222, in switch_backend newbackend, required_framework, current_framework)) ImportError: Cannot load backend 'Qt5Agg' which requires the 'qt5' interactive framework, as 'macosx' is currently running Before: $ pythonw testgetbackend.py testgetbackend.py:3: UserWarning: matplotlib.pyplot as already been imported, this call will have no effect. matplotlib.use('Qt5Agg') backend: MacOSX backend: MacOSX testgetbackend.py:11: UserWarning: matplotlib.pyplot as already been imported, this call will have no effect. matplotlib.use('Qt5Agg') PR Checklist Has Pytest style unit tests Code is Flake 8 compliant New features are documented, with examples if plot related Documentation is sphinx and numpydoc compliant Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there) Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

Open Graph Description: PR Summary Closes the long-desired ability to just call matplotlib.use so long as another GUI backend hasn't been started: Closes #12362 (for example) import matplotlib import matplotlib.pyplot...

X Description: PR Summary Closes the long-desired ability to just call matplotlib.use so long as another GUI backend hasn't been started: Closes #12362 (for example) import matplotlib import matplotlib.py...

Opengraph URL: https://github.com/matplotlib/matplotlib/pull/12608

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bd1646f ENH: allow matplotlib.use after getbackend jklymak Oct 24, 2018 https://github.com/matplotlib/matplotlib/pull/12608/commits/bd1646f397057c671009ac46e150df2ecb667efb
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