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This article mainly introduces "how to understand the getopt module in python". In daily operation, I believe many people have doubts about how to understand the getopt module in python. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to understand the getopt module in python"! Next, please follow the editor to study!

1. The Getopt module is a module that specializes in processing command-line parameters, which is used to obtain command-line options and parameters. Command-line options make program parameters more flexible, supporting short option mode (-) and long option mode (-).

2. This module provides two methods and one exception handling to analyze command line parameters.

Example

Import sysimport getopt def main (argv): input_file= "" output_file= "" # "hi:o:": short format analysis string. H is not followed by a colon, which means there is no parameter. I and o are followed by a colon, indicating that they are followed by parameters # ["help", "input_file=", "output_file="]: long format analysis string list. There is no equal sign after help, which means there are no parameters. Input_file and output_file are followed by a colon, indicating that the returned values include `opts` and `args` with the parameter #. Opts is a list of tuples, and each tuple is in the form of: (options, additional parameters), such as: ('- iTunes, 'test.png') # args is a list The elements are parameters opts that do not contain'-'or'- -', args = getopt.getopt (argv [1:], "hi:o:", ["help", "input_file=", "output_file="]) for opt, arg in opts: if opt in ("- h") "--help"): print ('script_2.py-I-o') print ('or: test_arg.py-- input_file=-- output_file=') sys.exit () elif opt in ("- I", "- input_file"): input_file= arg elif opt in ("- o") "--output_file"): output_file = arg print ('input file is:', input_file) print ('output file is:', output_file) # print parameter for i in range (0, len (args) without'-'or'- -'): print (parameter% s without'-'or'- 'parameter% s is:% s% (I + 1) Args [I]) if _ _ name__ = = "_ _ main__": so far The study on "how to understand the getopt module in python" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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