【Python】利用正则解析xml练习题

{
    "date": "18-03-29 06:04:47",
    "data": {
        "deviceType": 1,
        "result": {
            "resultType": 1
        },
        "capture": {
            "gender": 0,
            "smallImageUrl": "http://images-test.xlsdn.com/aW90X2Mzc19xZnQ5d2U1NVRyM3NTbEhLV0JVVBPT0=?auth_key=1522577086-0-0-27c9a7f9d9bccecbb18e3d6b58044fed",
            "bigImageUrl": "http://images-test.xlsdn.com/aW90X2Mzc190ZncvdjVMVWJHNzdzcFdrUDZJMWV3PT0=?auth_key=1522577086-0-0-cd3e6b2a109bbb6f71727d4dc3674c92",
            "faceId": "b9daccef-5c5b-4f8a-9f01-1875314fb7ec",
            "age": 20,
            "timestamp": 1522317682
        },
        "shopId": "23",
        "deviceId": "ID0000801941060862520718"
    }
}

#练习：用正则表达式方式判断deviceType对应的value值是否是整数，如果是整数把faceid截取出来
追加到文件内

import re
import json

def json_check(json_result,filename):
str=""
with open(json_result,"r") as f:
str=f.read()

try:
device=int(re.search(r'"deviceType":(.*?),',str).group(1).strip())
except TypeError,e:
return str(e)
except AttributeError,e:
return str(e)
except Exception,e:
return str(e)

faceId=re.search(r'"faceId":(.*?),',str).group(1).strip()
with open(filename,"a+") as f:
f.write(faceId)

json_check("e:\json_result.xml","e:\result.txt")