Bug report
Bug summary
In "API Changes - Behavior changes" (https://matplotlib.org/api/api_changes.html#behavior-changes) it says
"mplot3d auto-registration
mpl_toolkits.mplot3d is always registered by default now. It is no longer necessary to import mplot3d to create 3d axes with
ax = fig.add_subplot(111, projection="3d")"
I am not seeing this behaviour.
Code for reproduction
import matplotlib.pyplot as plt
fig3 = plt.figure()
ax3 = fig3.add_subplot(111, projection='3d')
and
mpl.projections.get_projection_names()
Actual outcome
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
~/Berechnung/lib64/python3.6/site-packages/matplotlib/projections/__init__.py in get_projection_class(projection)
57 try:
---> 58 return projection_registry.get_projection_class(projection)
59 except KeyError:
~/Berechnung/lib64/python3.6/site-packages/matplotlib/projections/__init__.py in get_projection_class(self, name)
24 """
---> 25 return self._all_projection_types[name]
26
KeyError: '3d'
During handling of the above exception, another exception occurred:
ValueError Traceback (most recent call last)
<ipython-input-2-95b16d9d7a18> in <module>
1 import matplotlib.pyplot as plt
2 fig3 = plt.figure()
----> 3 ax3 = fig3.add_subplot(111, projection='3d')
~/Berechnung/lib64/python3.6/site-packages/matplotlib/figure.py in add_subplot(self, *args, **kwargs)
1394 else:
1395 projection_class, kwargs, key = \
-> 1396 self._process_projection_requirements(*args, **kwargs)
1397
1398 # try to find the axes with this key in the stack
~/Berechnung/lib64/python3.6/site-packages/matplotlib/figure.py in _process_projection_requirements(self, polar, projection, *args, **kwargs)
1118
1119 if isinstance(projection, str) or projection is None:
-> 1120 projection_class = projections.get_projection_class(projection)
1121 elif hasattr(projection, '_as_mpl_axes'):
1122 projection_class, extra_kwargs = projection._as_mpl_axes()
~/Berechnung/lib64/python3.6/site-packages/matplotlib/projections/__init__.py in get_projection_class(projection)
58 return projection_registry.get_projection_class(projection)
59 except KeyError:
---> 60 raise ValueError("Unknown projection %r" % projection)
61
62
ValueError: Unknown projection '3d'
<Figure size 432x288 with 0 Axes>
and
['aitoff', 'hammer', 'lambert', 'mollweide', 'polar', 'rectilinear']
Expected outcome
An Axes3d object and the following output of mpl.projections.get_projection_names():
['3d', 'aitoff', 'hammer', 'lambert', 'mollweide', 'polar', 'rectilinear']
Matplotlib version
- Operating system: Linux thinkpad_T500 4.19.72-gentoo Updated docs to refer to git #3 SMP Sun Dec 8 14:16:38 CET 2019 x86_64 Intel(R) Core(TM)2 Duo CPU T9400 @ 2.53GHz GenuineIntel GNU/Linux
- Matplotlib version: 3.1.2
- Matplotlib backend (
print(matplotlib.get_backend())): module://ipykernel.pylab.backend_inline
- Python version: 3.6.9
- Jupyter version (if applicable): jupyter core : 4.6.1, jupyter-notebook : 6.0.2
Matplotlib is running in a python environment and was installed with pip.