How do I find the length (or dimensions, size) of a numpy matrix in python? [duplicate]
shape is a property of both numpy ndarray's and matrices.
A.shapewill return a tuple (m, n), where m is the number of rows, and n is the number of columns.
In fact, the numpy matrix object is built on top of the ndarray object, one of numpy's two fundamental objects (along with a universal function object), so it inherits from ndarray
matrix.size according to the numpy docs returns the Number of elements in the array. Hope that helps.