The Argparse module in Python

What's with Argparse?

Answer: parameter settings, such as Python demo.py-h and so on.

Start learning This module:

• Parser = Argparse. Argumentparser () #使用这个模块首先需要创建一个解析对象
• Parser.add_argument () #向该对象添加你想要的设置的参数以及设置项.
• Parser.parse_args () #解析

Start Case:

#!usr/bin/env python#Encding:utf-8#by I3ekrImportArgparseparser=Argparse. Argumentparser () parser.add_argument ('--ver','- v', help='This is the Help ...', required=true,nargs=2,type=str,choices=['a','b','C'],dest='Test') args=Parser.parse_args ()Print(args.test)

Output Result:

[Email protected]:/home/i3ekr/desktop# python 1.py-v ' a ' B '
[' A ', ' B ']

Some of the parameters used:

Help: The input-h parameter appears as shown below (the-h parameter is the default.)

• [email protected]:/home/i3ekr/desktop# cat 1.py #!usr/bin/env python#encding:utf-8#by i3ekrimport  Argparseparser = Argparse. Argumentparser () parser.add_argument ('--ver ', '-V ', help= ' this are help ... ') args = Parser.parse_args ()
  [email protected]:/home/i3ekr/desktop# python 1.py-husage:1.py [-h] [--ver ver]optional arguments:  - H,--help         show this help message and Exit--ver ver,-V ver  .

Required: Must parameter, if set this parameter is true then that is to explain you this parameter is necessary. Required=true

Type: Set Value type

Choices: Set the parameter value range, such as you set choices=[' test1 ', ' test2 ', then the value of the parameter can only be test1 or test2.

Nargs: The value of the parameter has how many, only one by default. nargs=2

Dest: The value of this parameter is parsed out and placed in that attribute.

More parameters: 46693471

Argparse modules in Python