Basic argument-parsing code to digest input from the command line.

argv_parser.py

# This basic command line argument parsing code is provided and
# calls the handle_this() and review_that() functions
# inspired by google's python class! thanks!

def main():
  if len(sys.argv) != 3:
    print 'usage: ./myscript.py {--option_1 | --option_2} file_to_get'
    sys.exit(1)

  option = sys.argv[1]
  filename = sys.argv[2]
  
  if option == '--option_1':
    handle_this(filename)
    
  elif option == '--option_2':
    review_that(filename)

  else:
    print 'unknown option: ' + option
    sys.exit(1)

if __name__ == '__main__':
  main()