Python: Import And Initialize Argparse After if __name__ == ‘__main__’?

I would put the import at the top, but leave the code that uses it inside the if __name__ block:

import argparse

# other code. . .

def main(name):
    print('Hello, %s!' % name)

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description = 'Say hello')
    parser.add_argument('name', help='your name, enter it')
    args = parser.parse_args()

    main(args.name)

Putting the imports at the top clarifies what modules your module uses. Importing argpase even when you don’t use it will have negligible performance impact.