问python3编码问题求助 unicode error？

代码：

import urllib.request

import json

from city import city

city_input = input('请输入要查找的城市:\n')

city_code = city[city_input]

web = urllib.request('http://www.weather.com.cn/data/cityinfo/%d.html'%city_code)

content = web.read()

dic = json.loads(content)

print(type(content))

print(type(dic))

print(content)

print(dic)

city.py文件内容：

city = {

'北京': '101010100',

'海淀': '101010200',

'朝阳': '101010300',

'顺义': '101010400',

'怀柔': '101010500',

}

提示错误：Traceback (most recent call last):

File "C:/Users/chen/Desktop/3.py", line 4, in <module>

from city import city

File "C:/Users/chen/Desktop\city.py", line 2

SyntaxError: (unicode error) 'utf-8' codec can't decode byte 0xb1 in position 0: invalid start byte