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Comment by pgorla | Hacker News Reader

Also, the last line to check for 'one-liners' won't get them all:

  $ grep -r  "if __name__ == '__main__'" /path/to/lib

Should be:

  $ grep -r  "if __name__ == ['\"]__main__['\"]" /path/to/lib

If you're not storing that somewhere, but rather typing it, I find you're often better off by being a little more forgiving, eg:

  $ grep -r "if __name__ == .__main__." /path/to/lib

or even: $ grep -Er 'if\W__name__\W==\W.__main__.'

You could also do this:

    grep -n __main__ *.py|grep __name__

which turns up few false positives.