myprogram:error:the following arguments are required:i <action> """action""">>>fromargparseimportArgumentParser>>>parser=ArgumentParser(prog='myprogram')>>>parser.add_argument("-a",action="store")#action="store"存储参数的值,默认操作>>>parser.parse_args(["-a","alter"])Namespace(a='alter...
required:可选参数是否为必选(仅针对可选参数)。 help:参数的帮助信息,当指定为argparse.SUPPRESS 时表示不显示该参数的帮助信息 metavar:在 usage 说明中的参数名称,对于必选参数默认就是参数名称,对于可选参数默认是全大写的参数名称; dest:解析后的参数名称,默认情况下,对于可选参数选取最长的名称,中划线转换为...
usage: argparse_arguments.py [-h] count units argparse_arguments.py: error: argument count: invalid int value: 'some' $ python argparse_arguments.py usage: argparse_arguments.py [-h] count units argparse_arguments.py: error: too few arguments 参数动作 argparse内置6种动作可以在解析到一个参数...
$ python ArgparsePractice.py a b c usage: ArgparsePractice.py [-h] [--sum] N [N ...] ArgparsePractice.py: error: argument N: invalid int value:'a' 1.1 创建一个解析器 使用argparse的第一步是创建一个ArgumentParser对象: >>> parser = argparse.ArgumentParser(description='Process some integer...
optional arguments: -h, --help show this help message and exit -n N Please enter a number -a A Please enter operation C:\Users\Administrator\Desktop\python3\day3> 输入错误的字符查看,比如-n是int,我这里输入字符串 C:\Users\Administrator\Desktop\python3\day3>python ArgparsePractice.py -n sd...
By default, argparse treats arguments as optional unless you tell it otherwise. If you want to make an argument required, you can use therequiredkeyword argument. importargparse parser=argparse.ArgumentParser()parser.add_argument('--name',required=True)args=parser.parse_args()print(f'Hello,{args...
Thenargsspecifies the number of command-line arguments that should be consumed. charseq.py #!/usr/bin/python import argparse import sys # nargs sets the required number of argument values # metavar gives name to argument values in error and help output ...
) ... usage: timer.py [-h] time timer.py: error: the following arguments are required: time Traceback (most recent call last): ... subprocess.CalledProcessError: Command '['python', 'timer.py']' returned non-zero exit status 2....
time, datetime, argparse Parser for command-line options, arguments and sub-commands https://docs.python.org/3/library/argparse.html optparse Deprecated since version 3.2: The optparse module is deprecated and will not be developed further; development will continue with the argparse module.About...
$ python -m cdd --help usage: python -m cdd [-h] [--version] {sync_properties,sync,gen,gen_routes,openapi,doctrans,exmod} ... Open API to/fro routes, models, and tests. Convert between docstrings, classes, methods, argparse, pydantic, and SQLalchemy. positional arguments: {sync_prop...