why cant i change directories in python? -


i'm trying change directories in python. first tried: 

>>> os.getcwd()

and got:

traceback (most recent call last):   file "<stdin>", line 1, in <module> nameerror: name 'os' not defined

i tried

>>> os.chir('/directory/i/want/to/change/to')

but still got 

nameerror: name 'os' not defined

how define operating system?

you need import os module first:

import os os.getcwd()

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