creating a boolean array which compares numpy elements to None

Question

I have a numpy array with dtype=object, and I want to create a boolean array identifying which elements are None. But it looks like None behaves di

Answer 1

You can use numpy.equal:

In [20]: np.equal(a, None)
Out[20]: 
array([False, False, False, False,  True, False, False, False, False,
       False,  True, False], dtype=bool)