Equivalent of "whos" command in NumPy

python matlab numpy octave
user996357 picture user996357 · Oct 15, 2011 · Viewed 17.9k times · Source

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?

Answer

JoshAdel picture JoshAdel · Oct 15, 2011

If you are using IPython, there is a whos command built-in:

In [9]: whos
Variable   Type       Data/Info
-------------------------------
a          ndarray    4x4x3: 48 elems, type `int64`, 384 bytes
b          ndarray    100000: 100000 elems, type `int64`, 800000 bytes (781 kb)
np         module     <module 'numpy' from '/Li<...>kages/numpy/__init__.py'>

In general I highly recommend using IPython when doing interactive work in python with numpy/scipy/matplotlib/etc. Fernando Perez and others are actively adding a lot of great features.

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