Python匹配带有Python的正则表达式中的重音字符的键

Question

这是我的代码

# -*- coding: utf-8 -*-
import json
import re

with open("/Users/paul/Desktop/file.json") as json_file:
    file = json.load(json_file)
print file["desc"]

key="capacità"
result = re.findall("((?:[\S,]+\s+){0,3})"+key+"\s+((?:[\S,]+\s*){0,3})", file["desc"], re.IGNORECASE)
print result

这是文件的内容

{
    "desc": "Frigocongelatore, capacit\u00e0 di 215 litri, h 122 cm, classe A+"
}

我的结果是[]

但我想要的是结果=“capacità”