python - 如何替换 "key": value pairs in string with key: value (remove quotes from key)?

Question

我需要从键中删除字符串中的引号。这是一个代码:

import re
mystr = '["key": val, "key2": val, "key3": v, "key5": 34, "key6": "ef"]'

key_pattern = "(\"(?P<key>\w+)\": )"
pattern = re.compile(key_pattern)
print(re.sub(pattern, "\key", mystr))

这不起作用。 我需要得到结果:

mystr = '[key: val, key2: val, key3: v, key5: 34, key6: "ef"]'

Answer 1

你可以使用

"(\w+)"(?=:)

请参阅regex demo 。详情:

• " - 一个 " 字符
• (\w+) - 第 1 组:一个或多个字母、数字、_
• " - 一个 " 字符
• (?=:) - 下一个字符必须是 :

请参阅Python demo :

import re
mystr = '["key": val, "key2": val, "key3": v, "key5": 34, "key6": "ef"]'
key_pattern = '"(\w+)"(?=:)'
print(re.sub(key_pattern, r"\1", mystr))
# => [key: val, key2: val, key3: v, key5: 34, key6: "ef"]