argparse.add_argument()中的type = dict [英] type=dict in argparse.add_argument()

问题描述

我正在尝试将字典设置为可选参数(使用argparse)；下面是我到目前为止的内容:

I'm trying to set up a dictionary as optional argument (using argparse); the following line is what I have so far:

parser.add_argument('-i','--image', type=dict, help='Generate an image map from the input file (syntax: {\'name\': <name>, \'voids\': \'#08080808\', \'0\': \'#00ff00ff\', \'100%%\': \'#ff00ff00\'}).')

但是运行脚本:

 $ ./script.py -i {'name': 'img.png','voids': '#00ff00ff','0': '#ff00ff00','100%': '#f80654ff'}

script.py: error: argument -i/--image: invalid dict value: '{name:'

即使在解释器内部，

>>> a={'name': 'img.png','voids': '#00ff00ff','0': '#ff00ff00','100%': '#f80654ff'}

工作正常.

那我该如何传递参数呢? 预先感谢.

So how should I pass the argument instead? Thanks in advance.

推荐答案

对此进行细分:json.loads在这里也适用.好像不太脏.

Necroing this: json.loads works here, too. It doesn't seem too dirty.

import json
import argparse

test = '{"name": "img.png","voids": "#00ff00ff","0": "#ff00ff00","100%": "#f80654ff"}'

parser = argparse.ArgumentParser()
parser.add_argument('-i', '--input', type=json.loads)

args = parser.parse_args(['-i', test])

print(args.input)

返回:

{u'0': u'#ff00ff00', u'100%': u'#f80654ff', u'voids': u'#00ff00ff', u'name': u'img.png'}

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