How do I call a specific python function in a file from the command line? [duplicate]

Question

Say there is the following function in a file called fb_auth_token.py

def get_fb_access_token(email, password): ... return ...

How would I run this from bash? python fb_auth_token.py get_fb_access?. How do I call just the one specific function?

It depends on what exactly you want to do. You could for example just call it in your Python file: print(get_fb_access_token(email, password)). And then run python fb_auth_token.py — Feodoran
– Feodoran, Commented Aug 15, 2017 at 17:48

Simon Hobbs · Accepted Answer · 2017-08-15 17:53:03Z

You could either call python with the command option:

python -c "from file_name import function;function()"

or if you want this function to be called every time you execute the script you could add the line

if __name__ == "__main__": function()

This will then only execute this function if the file is executed directly (i.e. you can still import it into another script without "function" being called).

Martin Erlic · Accepted Answer · 2017-08-15 17:48:57Z

I figured it out:

python -c 'import fb_auth_token; print fb_auth_token.get_fb_access_token("email", "password")'

digitaLink · Accepted Answer · 2017-08-15 17:49:48Z

You can use the -c command line argument. For example:

python -c 'import fb_auth_token; fb_auth_token.get_fb_access_token("email", "password")'

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