Is there function in Python which serves as main in C

I want开发者_如何转开发 to know whether there is a main function in Python as in C, etc. ?

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The short answer is no. Typically,

if __name__ == '__main__':
    import sys
    argc = len(sys.argv)
    argv = sys.argv

is the closest thing you get to a main in Python. More info here.

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No. Python scripts are executed from beginning to end, which means that there is no need for a main() function.

Having said that, many scripts use a main sentinel, which checks the value of a certain global to see if the script/module is being run directly:

if __name__ == '__main__':
  dosomething()

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Python is executed from top to down like a script. There is no main function. However, when you want to define as certain execution structure, you can choose to check if the magic attribute __name__ is set to __main__, which it does only when it is executed directly through an interpretor (that is not imported as module).

There are some ways of defining the __name__ == '__main__' construct. This article gives some pointers.