>>> p = Path([(0, 0), (1, 0), (1, 1), (np.nan, np.nan)],
         [Path.MOVETO, Path.LINETO, Path.LINETO, Path.CLOSEPOLY])
>>> # correctly ignores CLOSEPOLY even though it's NaN
>>> p.cleaned(remove_nans=True)
Path(array([[ 0.,  0.],
       [ 1.,  0.],
       [ 1.,  1.],
       [nan, nan],
       [ 0.,  0.]]), array([ 1,  2,  2, 79,  0], dtype=uint8))
>>> # but now for some reason these NaN's are used to populate LINETO's
>>> p.cleaned(remove_nans=True, simplify=True)
Path(array([[ 0.,  0.],
       [ 1.,  0.],
       [ 1.,  1.],
       [nan, nan],
       [nan, nan],
       [ 0.,  0.]]), array([1, 2, 2, 2, 2, 0], dtype=uint8))

>>> p.cleaned(remove_nans=True, simplify=True)
Path(array([[ 0.,  0.],
       [ 1.,  0.],
       [ 1.,  1.],
       [0, 0],
       [ 0.,  0.]]), array([1, 2, 2, 2, 0], dtype=uint8))