parser = argparse.ArgumentParser() parsing

The

argument module is mainly used by the user to write a command line interface; the program defines the arguments it needs, and then argument parses the arguments from sys.argv.
1. Use the process
1 to create a parser
parser = argparse.ArgumentParser()

2 parameter settings

parser.add_argument(name or flags...span>[, action][, nargs][span>, const][, default][,span> type][, choices][, required][, help][, metavar][, dest])

name or flags: Name or list.
action: The action to use when the argument appears on the command line.
nargs: the number of command-line arguments that should be read
const: the default value when no arguments are specified
default: the path
type: the type
choices: an alternative to the allowable values ​​of the parameterA container
required: whether optional parameters can be omitted
help: help information for parameters

3 parsing parameters

 opt = parser.parse_args()