How can I print a Python file's docstring when executing it?

Question

I have a Python script with a docstring. When the parsing of the command-line arguments does not succeed, I want to print the docstring for the user\'s information.

Answer 1

This will print the __doc__ string when --help is the only argument.

if __name__=='__main__':
 if len(sys.argv)==2 and sys.argv[1]=='--help':
    print(__doc__)

Works for both:

• ./yourscriptname.py --help
• python3 yourscriptname.py --help