Equivalent of "whos" command in NumPy
Python has a builtin function dir() which returns the list of names in the current local scope.
I am new to Numpy and trying to search for a function to list out the variables along with their sizes (both the matrix dimensions as well as memory usage). 
I am essentially looking for an equivalent of the "whos" command in MATLAB and Octave. Does there exist any such command in NumPy?