argparse模块可以设置两种命令参数，一个是位置参数，一个是命令参数
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位置参数
import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("name")args = parser.parse_args()if args.name: print(args.name) 直接不带参数运行
报错，需要传个位置参数
打印了传的参数
-
可选参数
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread")args = parser.parse_args()if args.thread: print(args.thread) 运行结果
没传参数也没有报错，所以参数是可选的，而且参数的顺序也不是按顺序的
-t和--thread都能进行传参数
后面加等号和直接传参数是一样的
可选参数用规定的符号来识别，如上例的-和--，其他的为位置参数，如果有位置参数，不传的话就会报错
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设置命令参数的参数
help：参数描述信息
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 运行
type：参数类型，如果类型不对就会报错
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",type=int,help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 参数类型设置为int类型
传入一个字符串
传入一个整型
成功执行
default：默认值
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",default=23,help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 不传入任何参数，直接运行
dest：可作为参数名
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",dest="thread_num",help="The Thread To Run")args = parser.parse_args()if args.thread_num: #需要改为dest的值 print(args.thread_num) 运行
choices：可选择的值
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",choices=["one","two"],help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 参数-t/--thread可选的值为one和two
运行
required：是否为必须参数，值为True或False
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",required=true,help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 不传参数，运行
报错
const：保存一个常量，不能单独使用，可以和nargs和action中的部分参数一起使用
nargs：参数的数量，值为整数，*为任意个，+为一个或多个，当值为?时，首先从命令行获取参数，然后是从const获取参数，最后从default获得参数
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",nargs="*",help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 运行结果
把传入的参数以列表输出
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",nargs="?",const=1,default=2,help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 从const获取了值
action：默认值为store，store_true和store_false把值设置为True或False，store_const把值存入const中，count统计参数出现的次数，append把传入参数存为列表，append_const根据const存为列表
store：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="store",help="The Thread To Run")args = parser.parse_args()if args.thread: print(args.thread) 运行结果
store_true和store_false：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="store_true")parser.add_argument("-u","--url",action="store_false")args = parser.parse_args()if args: print(args) 运行
store_const：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="store_const",const=12)args = parser.parse_args()if args: print(args) 运行结果
count：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="count")args = parser.parse_args()if args: print(args) 运行结果
append：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="append")args = parser.parse_args()if args: print(args) 运行结果
append_const：
# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"import argparseparser = argparse.ArgumentParser(description="The Help of Python")parser.add_argument("-t","--thread",action="append_const",const=1)args = parser.parse_args()if args: print(args) 运行结果
