using cmd or powershell, calling python file returns no output

I've just installed python 2.7.2 on this machine. I'm attempting to run this code:

class Hello(object):
    def main(self):
        print "hello world"

if __name__ == "main":
    h = Hello()
    h.main()     

When I call it with python ./foo.py, it does not return either a print 开发者_如何学JAVAstatement or log statement, just what appears to be a newline.

When I call it from a python shell it works as expected.

Additionally, I could write the file:

print "hello world"

And that will print in either powershell or cmd. What am I missing?

It's if __name__ == "__main__":. You forgot the underscores around main.