terminal - In Python, what does pydoc do? -

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new programming , python altogether. in book i'm learning from, author suggested find out purpose of pydoc.

i did google search on it, , found match (from gnome terminal) didn't make sense me. mind simplifying bit? thanks.

pydoc / documentation module python.

use on windows terminal understand function in python :

python -m pydoc <function>

eg.

python -m pydoc raw_input

if documentation particular function long, use 'q' out of it.

e.g. in case of 

python -m pydoc tkinter

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