"Undefined variable : main" in pydev/python

Question

I made a file named "Main" in pydev and inside it wrote:

if  __name__ =='__Main__':
    main()

def main():
    print("jargon")

It says my call to main() under the if statement contains an undefined variable and won't compile. Why does it do this?

BrenBarn · Accepted Answer · 2013-01-06 20:37:49Z

9

Python code is executed top-to-bottom. You need to move your main() definition above the if __name__ == '__main__' block. The way you have it, at the time that you try to call main(), the function does not yet exist.

answered Jan 6, 2013 at 20:37

BrenBarn

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2 Comments

keyert Over a year ago

I see. Since Java is bottom-up would a Jython interpreter execute bottom-up or top-bottom?

BrenBarn Over a year ago

It will still be top down, since Jython code is Python source, not Java, so it follows the rules of the Python language.

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