How do I unload (reload) a Python module?

Question

I have a long-running Python server and would like to be able to upgrade a service without restarting the server. What\'s the best way do do this?

if foo.py          


        

Answer 1

For Python 2 use built-in function reload():

reload(module)

For Python 2 and 3.2–3.3 use reload from module imp:

import imp
imp.reload(module)

But imp is deprecated since version 3.4 in favor of importlib, so use:

import importlib
importlib.reload(module)

or

from importlib import reload
reload(module)