Python main call within class

python pydev

franka · Oct 24, 2011 · Viewed 99.3k times · Source

I haven't done much python - coming from a C/Java background - so excuse me for asking such a simple question. I am using Pydev in Eclipse to write this simple program, and all I want it to do is to execute my main function:

class Example():

if __name__ == '__main__':
    Example().main()        <----- What goes here?


    def main(self):     
        print "Hello World!

That is what I have now. I have also tried

self.main()

and

main()

and

main(self)

none of which work. What am I missing?

Answer

Well, first, you need to actually define a function before you can run it (and it doesn't need to be called main). For instance:

class Example(object):
    def run(self):
        print "Hello, world!"

if __name__ == '__main__':
    Example().run()

You don't need to use a class, though - if all you want to do is run some code, just put it inside a function and call the function, or just put it in the if block:

def main():
    print "Hello, world!"

if __name__ == '__main__':
    main()

if __name__ == '__main__':
    print "Hello, world!"

Python main call within class

Answer

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