book_dict = { 
 "store": {
  "book": [ 
   { "category": "reference",
    "author": "Nigel Rees",
    "title": "Sayings of the Century",
    "price": 8.95
   },
   { "category": "fiction",
    "author": "Evelyn Waugh",
    "title": "Sword of Honour",
    "price": 12.99
   },
   { "category": "fiction",
    "author": "Herman Melville",
    "title": "Moby Dick",
    "isbn": "0-553-21311-3",
    "price": 8.99
   },
   { "category": "fiction",
    "author": "J. R. R. Tolkien",
    "title": "The Lord of the Rings",
    "isbn": "0-395-19395-8",
    "price": 22.99
   }
  ],
  "bicycle": {
   "color": "red",
   "price": 19.95
  }
 }
}

import jsonpath

result = {
  "code": 0,
  "data": [
    {
      "age": 20,
      "create_time": "2019-09-15",
      "id": 1,
      "mail": "283340479@qq.com",
      "name": "yoyo",
      "sex": "M"
    },
    {
      "age": 21,
      "create_time": "2019-09-16",
      "id": 2,
      "mail": "123445@qq.com",
      "name": "yoyo111",
      "sex": "M"
    }
  ],
  "msg": "success!"
}

msg = jsonpath.jsonpath(result, '$.msg')
print(msg)  # 输出结果 ['success!']
names = jsonpath.jsonpath(result, '$..name')
print(names)  # 输出结果 ['yoyo', 'yoyo111']
no = jsonpath.jsonpath(result, '$..yoyo')
print(no)  # 找不到是结果是 False