>>> import numpy as np>>> import matplotlib.patches>>> rect = matplotlib.patches.Rectangle([0, 0], 1, 1)>>> rect.set_hatchcolor(np.zeros(3))Traceback (most recent call last):  File "<stdin>", line 1, in <module>  File "/home/larsoner/python/matplotlib/lib/matplotlib/patches.py", line 445, in set_hatchcolor    self._set_hatchcolor(color)  File "/home/larsoner/python/matplotlib/lib/matplotlib/patches.py", line 428, in _set_hatchcolor    if color == 'edge':       ^^^^^^^^^^^^^^^ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()