legend.get_window_extent() fails #21285
Description
Bug summary
It seems a bug has crept in with points_to_pixels not available as a function called by get_window_extent
Code for reproduction
(Pdb) leg2 = plt.legend(loc='upper left', ncol=2, fontsize=8)
(Pdb) leg2.get_window_extent()
*** AttributeError: 'NoneType' object has no attribute 'points_to_pixels'
(Pdb) print(matplotlib.__version__)
3.4.2
(Pdb) print(matplotlib.get_backend())
MacOSX
(Pdb) import sys; print(sys.version_info)
sys.version_info(major=3, minor=9, micro=6, releaselevel='final', serial=0)
$ jupyter --version
jupyter core : 4.7.1
jupyter-notebook : 6.4.0
qtconsole : 5.1.1
ipython : 7.25.0
ipykernel : 6.0.1
jupyter client : 6.1.12
jupyter lab : not installed
nbconvert : 6.1.0
ipywidgets : 7.6.3
nbformat : 5.1.3
traitlets : 5.0.5Actual outcome
Error, as above
Expected outcome
I expected to get coords
Operating system
MacOS 11.6
Matplotlib Version
3.4.2
Matplotlib Backend
MacOSX
Python version
3.9.6
Jupyter version
core 4.7.1; notebook 6.4.0
Other libraries
No response
Installation
conda
Conda channel
conda-forge