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Bug report
Bug summary
When using a datetime x-axis in a pcolormesh, and nearest shading,
TypeError: '>=' not supported between instances of 'datetime.timedelta' and 'int'
is raised.
From what I can tell,#18398 assumed comparison with 0 would always be possible, but this isn't the case fordatetime.timedelta.
Code for reproduction
fromdatetimeimportdatetimefrommatplotlibimportpyplotaspltx_coords= [datetime.fromtimestamp(x*3600)forxinrange(24)]y_coords= [*range(0,10)]plt.pcolormesh(x_coords,y_coords, [[*range(24)]for_inrange(10)],shading="nearest")
Actual outcome
Traceback (most recent call last): File "<stdin>", line 1, in <module> File ".local/lib/python3.8/site-packages/matplotlib/pyplot.py", line 2801, in pcolormesh __ret = gca().pcolormesh( File ".local/lib/python3.8/site-packages/matplotlib/__init__.py", line 1438, in inner return func(ax, *map(sanitize_sequence, args), **kwargs) File ".local/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 6093, in pcolormesh X, Y, C, shading = self._pcolorargs('pcolormesh', *args, File ".local/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 5651, in _pcolorargs X = _interp_grid(X) File ".local/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 5633, in _interp_grid if not (np.all(dX >= 0) or np.all(dX <= 0)):TypeError: '>=' not supported between instances of 'datetime.timedelta' and 'int'Expected outcome
None
Matplotlib version
- Matplotlib version: 3.3.2
- Python version: 3.8
works withpip3 install matplotlib==3.3.1, fails withpip3 install matplotlib==3.3.2
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