matrix.
size
Number of elements in the array.
Equivalent to np.prod(a.shape), i.e., the product of the array’s dimensions.
np.prod(a.shape)
Examples
>>> x = np.zeros((3, 5, 2), dtype=np.complex128) >>> x.size 30 >>> np.prod(x.shape) 30
numpy.matrix.shape
numpy.matrix.strides