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Python - Basic Main Structure

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Extremely simple snippet showing the basic structure of a Python program.

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  1. import sys
  2.  
  3. def main():
  4.     try:    
  5.         if len(sys.argv) >= 2:
  6.             name = sys.argv[1]
  7.         else:
  8.             name = 'World'
  9.         print 'Hello', name
  10.  
  11.         print 'Type something to display its type and value.'
  12.         userInput = raw_input()
  13.         print 'User input - type: %s, value: %s' % (type(userInput), userInput)
  14.     except Exception as ex:
  15.         print ex.message
  16.         return 1 # indicates error, but not necessary
  17.     else:
  18.         return 0 # return 0 # indicates errorlessly exit, but not necessary    
  19.  
  20. # this is the standard boilerplate that calls the main() function
  21. if __name__ == '__main__':
  22.     # sys.exit(main(sys.argv)) # used to give a better look to exists
  23.     main()

URL: http://code.google.com/edu/languages/google-python-class/

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