argparse 可以接受参数值作为 key=val 对 [英] Can argparse accept argument value as key=val pairs

问题描述

我正在尝试使用 argparse 来实现以下选项(由于项目要求，不能使用任何其他工具，如 docopt):-

I am trying to implement below option by using argparse(can't use any other tool like docopt because of project requirement):-

cli.py --conf key1=value1, key2=value2, kay3=value3
or
cli.py --conf key1=value1 key2=value2 key3=value3

到目前为止，我已经尝试过 type=json.loads 或 dict 但没有帮助.一种可能的解决方案是使用 type=str，然后将其解析为 dict.你们知道我缺少的任何其他更好的解决方案吗..提前致谢.

So far I have tried type=json.loads or dict but not helping. One possible solution is to use type=str and then later parse it to dict. Do you guys know any other better solution which I am missing.. Thanks in advance.

注意 - 不能使用 --key1=value1 --key2=value2 --key3=value3 因为我不想限制键/值的数量和名称.它将有助于将来支持新的 key/val.

Note- Can't use --key1=value1 --key2=value2 --key3=value3 because I don't want to restrict count and name of key/value. It will help in supporting new key/val in future.

推荐答案

既然你评论说你必须像写的那样使用 cli，这是另一个解决方案.在 argparse 中，我会像这样定义 conf 参数:

Since you commented that you must use the cli as it is written, This is another solution. In argparse i would define the conf argument like this:

parser.add_argument('--conf', nargs='*')

使用 nargs='*' 之后的所有参数都将在同一个列表中，如下所示 ['key1=value1', 'key2=value2', 'key3=value3']

With nargs='*' all the arguments following that would be in the same list which looks like this ['key1=value1', 'key2=value2', 'key3=value3']

要解析该列表并从中获取字典，您可以这样做:

To parse that list and get a dict out of it, you can do this:

parsed_conf = {}
for pair in conf:
    kay, value = pair.split('=')
    parsed_conf[key] = value

现在这样调用你的程序(不带逗号):

Now call your program like this (without commas):

cli.py --conf key1=value1 key2=value2 key3=value3

它应该可以工作

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