argparse

What I need is: pro [-a xxx | [-b yyy -c zzz]] I tried this but does not work. Could someone help me out? group= parser.add_argument_group('Model 2') group_ex = group.add_mutually_exclusive_group() group_ex.add_argument("-a", type=str, action = "store", default = "", help="test") group_ex_2 = group_ex.add_argument_group("option 2") group_ex_2.add_argument("-b", type=str, action = "store", default = "", help="test") group_ex_2.add_argument("-c", type=str, action = "store", default = "", help="test") Thanks! add_mutually_exclusive_group doesn't make an entire group mutually exclusive. It makes

argparse模块的使用 | python 用于接收python命令行下的命令行参数，并进行多种功能解析的模块 基本使用步骤： 定义一个文件名为test_parse.py的文件，内容如下： from argparse import ArgumentParser # 其中最常用的一个模块：ArgumentParser # 定义一个命令行参数解析器对象 parser = ArgumentParser() # 为命令行添加一个参数，参数名为argname1 parser.add_argument("argname1") # 返回命令行参数的集合的某种数据结构对象，args里存放了所有添加的命令行参数 args = parser.parse_args() # 打印测试命令行参数输入是否有效 print("输入的命令行参数为", args.argname1) 命令行输入： python test_parse.py 你好 运行结果： 输入的命令行参数为你好 为命令行参数添加帮助信息和数据类型 定义一个文件名为test_parse.py的文件，内容如下： from argparse import ArgumentParser # 其中最常用的一个模块：ArgumentParser # 定义一个命令行参数解析器对象 parser = ArgumentParser() # 为命令行添加一个参数

I noticed that the Python 2.7 documentation includes yet another command-line parsing module. In addition to getopt and optparse we now have argparse . Why has yet another command-line parsing module been created? Why should I use it instead of optparse ? Are there new features that I should know about? Nicholas Knight As of python 2.7 , optparse is deprecated, and will hopefully go away in the future. argparse is better for all the reasons listed on its original page ( https://code.google.com/archive/p/argparse/ ): handling positional arguments supporting sub-commands allowing alternative

Is there a way to make argparse recognize anything between two quotes as a single argument? It seems to keep seeing the dashes and assuming that it's the start of a new option I have something like: mainparser = argparse.ArgumentParser() subparsers = mainparser.add_subparsers(dest='subcommand') parser = subparsers.add_parser('queue') parser.add_argument('-env', '--extraEnvVars', type=str, help='String of extra arguments to be passed to model.') ...other arguments added to parser... But when I run: python Application.py queue -env "-s WHATEVER -e COOL STUFF" It gives me: Application.py queue:

I am trying to pass a list as an argument to a command line program. Is there an argparse option to pass a list as option? parser.add_argument('-l', '--list', type=list, action='store', dest='list', help='<Required> Set flag', required=True) Script is called like below python test.py -l "265340 268738 270774 270817" TL;DR Use the nargs option or the 'append' setting of the action option (depending on how you want the user interface to behave). nargs parser.add_argument('-l','--list', nargs='+', help='<Required> Set flag', required=True) # Use like: # python arg.py -l 1234 2345 3456 4567 nargs=

The documentation for the argparse python module , while excellent I'm sure, is too much for my tiny beginner brain to grasp right now. I don't need to do math on the command line or meddle with formatting lines on the screen or change option characters. All I want to do is "If arg is A, do this, if B do that, if none of the above show help and quit" . My understanding of the original question is two-fold. First, in terms of the simplest possible argparse example, I'm surprised that I haven't seen it here. Of course, to be dead-simple, it's also all overhead with little power, but it might get