Argparse

The official version of Argparse is a Python module. The latest version of Argparse In most cases, the script is likely to require multiple parameters, and the type and purpose of each parameter are different. At this time, it is very useful to add a label before the parameter to indicate the type and purpose of the parameter. Argparse is introduced in great detail through sample code, which has certain reference learning value for everyone's study or work.

Argparse software introduction

A feature-rich command-line parser for Lua for python inspired by Argparse. Argparse supports positional arguments, options, flags, optional arguments, subcommands and more. Argparse automatically generates usage, help and error messages. The Argparse module makes user-friendly command line programming more convenient. First define what parameters are needed in the program, and thenargparsewill automatically start fromsys.argvparse the previously defined parameters. It can also automatically generate help documents and automatically report errors when the user enters incorrect parameters.

Argparse software features

1. Basic framework

​ ​ 2. default: Default parameter when no value is set

3. required: Indicates whether this parameter must be set

​ ​ 4. type: parameter type

5. choices: The parameter value can only be selected from several options.

​ ​ 6. help: Description information for the specified parameters

​ ​ 7. dest: Set the variable name of the parameter in the code

​ ​ 8. nargs: Set the number of parameters that can be provided during use

Argparse software features

Directly given

This method is convenient to implement, but it is less flexible and requires opening the source code to modify it every time.

   Manual analysis

This method is relatively common, but it is inconvenient to display when there are too many parameters, because the format and number of parameters entered must be exactly the same each time.

   Automatic analysis

Compared with the above two methods, this automatic analysis method is more flexible, the parameters can be selected, and the order can be uncertain, so it is recommended to use this method. It mainly relies on the python package argparse.

Argparse update log

​ ​ 1. Modify user-submitted bugs

​ ​ 2.Add new features