如何在预定义的参数字符串中使用python的argparse? [英] How can I use python's argparse with a predefined argument string?

问题描述

我想使用pythons argparse模块来解析我的cli参数字符串.这对于从终端传递的参数有效，但不适用于给定的字符串.

I want to use the pythons argparse module to parse my cli parameter string. This works for the parameters a pass from terminal, but not with a given string.

import argparse

parser = argparse.ArgumentParser(description='Argparse Test script')
parser.add_argument("param", help='some parameter')

argString = 'someTestFile'
print(argString)

args = parser.parse_args(argString)

如果运行此脚本，则会得到以下输出:

If I run this script I get this output:

~/someTestFile
usage: argparsetest.py [-h] param
argparsetest.py: error: unrecognized arguments: o m e T e s t F i l e

~/someTestFile在o m e T e s t F i l e中以某种方式进行了转换.如前所述，如果我从终端传递文件名，它就可以工作.

The ~/someTestFile is somehow transformed in o m e T e s t F i l e. As already mentioned, it works if I pass the filename from the terminal.

我可以想象，这与字符串编码有关.有人知道如何解决此问题吗?

I could imagine, that this has something to do with string encodings. Does someone has an idea how to fix this?

推荐答案

parser.parse_args()要求序列与sys.argv[1:]相同.如果将字符串像sys.argv序列一样对待，则会得到['s', 'o', 'm', 'e', 'T', 'e', 's', 't', 'F', 'i', 'l', 'e']. s成为相关参数，然后字符串的其余部分不可解析.

parser.parse_args() expects a sequence in the same form as sys.argv[1:]. If you treat a string like a sys.argv sequence, you get ['s', 'o', 'm', 'e', 'T', 'e', 's', 't', 'F', 'i', 'l', 'e']. 's' becomes the relevant argument, and then the rest of the string is unparseable.

相反，您可能想传递parser.parse_args(['someTestFile'])

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