can't use tightlayout without getting an error in matplotlib

Question

In the following code, if I uncomment the line with the call to tightlayout, I get a crash in matplotlib. I'll be grateful for any suggestion re. why this is happening.

import matplotlib.pyplot as plt
import cartopy.crs as ccrs
fig= plt.figure(figsize=(12, 7))
ax= fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
ax.stock_img()
# plt.tight_layout()
plt.show()

Here's the traceback:

Traceback (most recent call last): File "test.py", line 6, in plt.tight_layout() File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\cbook\deprecation.py", line 451, in wrapper return func(*args, **kwargs) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\pyplot.py", line 1490, in tight_layout gcf().tight_layout(pad=pad, h_pad=h_pad, w_pad=w_pad, rect=rect) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\cbook\deprecation.py", line 411, in wrapper return func(*inner_args, **inner_kwargs) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\figure.py", line 2613, in tight_layout kwargs = get_tight_layout_figure( File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\tight_layout.py", line 303, in get_tight_layout_figure kwargs = auto_adjust_subplotpars(fig, renderer, File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\tight_layout.py", line 84, in auto_adjust_subplotpars bb += [ax.get_tightbbox(renderer, for_layout_only=True)] File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\axes_base.py", line 4203, in get_tightbbox bbox = a.get_tightbbox(renderer) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\artist.py", line 286, in get_tightbbox bbox = Bbox.intersection(bbox, clip_path.get_extents()) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\matplotlib\path.py", line 603, in get_extents return Bbox([xys.min(axis=0), xys.max(axis=0)]) File "C:\ProgramData\Anaconda3\envs\py38\lib\site-packages\numpy\core_methods.py", line 43, in _amin return umr_minimum(a, axis, None, out, keepdims, initial, where) ValueError: zero-size array to reduction operation minimum which has no identity

I'm using Python 3.8.5 with matplotlib 3.3.1 and CartoPy 0.18.0.

It's all OK on my machine. More info should be provided, i.e. error messages, S/W version, etc. — swatchai
Works for me on Python 3.8 with CartoPy 0.18 and matplotlib 3.3.2 — DopplerShift

Léonard Léonard · Accepted Answer · 2020-09-27T15:24:14

I had exactly the same configuration, and was able to reproduce your error. But after looking for similar tracebacks, I finally found this post, where upgrading Matplotlib from 3.3.1 to 3.3.2 have solved the issue.

So if you first run in a terminal (with pip or conda)

conda upgrade matplotlib

or

pip install matplotlib==3.3.2

Then, make sure Matplotlib was updated to 3.3.2 and run your script:

import matplotlib.pyplot as plt
import cartopy.crs as ccrs

fig= plt.figure(figsize=(12, 7))
ax= fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())
ax.stock_img()
plt.tight_layout()
plt.show()

which produced the desired out with effectively working tight_layout() on my machine.

can't use tightlayout without getting an error in matplotlib

1 Answers