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How can I find the dimensions of a matrix in Python?

How can I find the dimensions of a matrix in Python. Len(A) returns only one variable.

Edit:

close = dataobj.get_data(timestamps, symbols, closefield)

Is (I assume) generating a matrix of integers (less likely strings). I need to find the size of that matrix, so I can run some tests without having to iterate through all of the elements. As far as the data type goes, I assume it’s an array of arrays (or list of lists).

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Answer

The number of rows of a list of lists would be: len(A) and the number of columns len(A[0]) given that all rows have the same number of columns, i.e. all lists in each index are of the same size.

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