Python命令模块argparse学习笔记(一)

首先是关于-h/--help参数的设置

description：位于help信息前，可用于描述help
prog：描述help信息中程序的名称
epilog：位于help信息后
usage：描述程序的用途
add_help：默认为True，设为False后，就不能显示help信息了，执行-h/--help将会报错
conflict_handler：解决参数冲突
prefix_chars：参数前缀，默认为"-"
fromfile_prefix_chars：设置前缀字符，放在文件名之前，对文件里的参数进行读取和执行
argument_default：参数的全局默认值

description/epilog

# -*- coding:utf-8 -*-

__author__ = "MuT6 Sch01aR"

import argparse

parser = argparse.ArgumentParser(description="The Help Of Python")

parser.add_argument("-t","--thread",help="Thread Run",action="store_true")

args = parser.parse_args()

if args.thread:

    print(args)

else:

    print("Error")

执行参数-h

运行结果

prog/usage

# -*- coding:utf-8 -*-

__author__ = "MuT6 Sch01aR"

import argparse

parser = argparse.ArgumentParser(description="The Help Of Python",epilog="End Of Help",usage="Python Run Thread")

parser.add_argument("-t","--thread",help="Thread Run",action="store_true")

args = parser.parse_args()

if args.thread:

    print(args)

else:

    print("Error")

运行结果

默认的为

如果没有设置prog和usage则显示默认的，prog和usage都设置的话，显示usage的

add_help

# -*- coding:utf-8 -*-

__author__ = "MuT6 Sch01aR"

import argparse

parser = argparse.ArgumentParser(description="The Help Of Python",epilog="End Of Help",add_help=False)

parser.add_argument("-t","--thread",help="Thread Run",action="store_true")

args = parser.parse_args()

if args.thread:

    print(args)

else:

    print("Error")

运行结果

conflict_handler

当有参数重复的时候，程序会报错，把conflict_handler设置为resovle就可以解决

# -*- coding:utf-8 -*-

__author__ = "MuT6 Sch01aR"

import argparse

parser = argparse.ArgumentParser(description="The Help Of Python",epilog="End Of Help")

parser.add_argument("-t","--thread",help="Thread Run",action="store_true")

parser.add_argument("-t","--thread",help="Thread Run(2)",action="store_true")

args = parser.parse_args()

if args.thread:

    print(args)

else:

    print("Error")

运行，报错

给argparse.ArgumentParser()添加conflict_handler="resolve"

# -*- coding:utf-8 -*-

__author__ = "MuT6 Sch01aR"

import argparse

parser = argparse.ArgumentParser(description="The Help Of Python",epilog="End Of Help",conflict_handler="resolve")

parser.add_argument("-t","--thread",help="Thread Run",action="store_true")

parser.add_argument("-t","--thread",help="Thread Run(2)",action="store_true")

args = parser.parse_args()

if args.thread:

    print(args)

else:

    print("Error")

运行结果

原先的-t/--thread参数被覆盖

巴特西

Python命令模块argparse学习笔记(一)

description/epilog

prog/usage

add_help

conflict_handler

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