Python argparse允许组合标志 [英] Python argparse allow combined flags

问题描述

argparse是否可以像这样分析组合标志:

Is it possible for argparse to parse combined flags like this:

app.py -bcda something

在这种情况下，我希望将 something 设置为 -a ，其余的存储为True.基本上:

In this case, I would want something to be set to -a and the rest would be stored True. Basically:

app.py -b -c -d -a something

我知道大多数程序都允许这样做，例如 grep -rEw ，但是用argparse做到这一点有多困难?

I know most programs allow this, e.g. grep -rEw, but how hard would it be to do this with with argparse?

推荐答案

您可以使用store_const来实现:

You can achieve this with store_const:

parser = argparse.ArgumentParser()
parser.add_argument('-a', action='store_const', const=True, default=False)
parser.add_argument('-b', action='store_const', const=True, default=False)
args = parser.parse_args()

然后您可以使用 -a -b 或 -ab (或 -a 或 -b ).

Then you can call this from the command line either with -a -b or with -ab (or -a, or -b).

如果您希望其中一个标志作为参数，则需要将其作为链的最后一项传递.因此，如果 a 接受参数，则需要做 -bcda某事

and if you want one of the flags to take an argument, you need to pass it as the last item of the chain. So if a takes an argument, you'd need to do -bcda something

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