Python字符串转换成字典
方法1:
--案例1
headers字符串{}中是双引号,外面是单引号,能正常转换成dict字典格式
import json headers = '{"Content-Type": "application/json"}' headers = json.loads(headers) print(headers) print(type(headers))
响应结果:
{'Content-Type': 'application/json'} <class 'dict'>
--案例2字符串{}中是单引号,外面是双引号,转换失败报错
import json headers = "{'Content-Type': 'application/json'}" headers = json.loads(headers) print(headers) print(type(headers))
响应结果:
Traceback (most recent call last): File "G:/Django项目/pythonProject/Python_json/Demo01_json.py", line 3, in <module> headers = json.loads(headers) File "C:\Users\huangyanqiu\AppData\Local\Programs\Python\Python38\lib\json\__init__.py", line 357, in loads return _default_decoder.decode(s) File "C:\Users\huangyanqiu\AppData\Local\Programs\Python\Python38\lib\json\decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "C:\Users\huangyanqiu\AppData\Local\Programs\Python\Python38\lib\json\decoder.py", line 353, in raw_decode obj, end = self.scan_once(s, idx) json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 1 column 2 (char 1) Process finished with exit code 1
方法2
eval函数将字符字典,通过 eval
进行转换就不存在上面使用 json
进行转换的问题。但是,使用 eval
却存在安全性的问题
headers = "{'Content-Type': 'application/json'}" headers = eval(headers) print(headers) print(type(headers))
响应结果:
{'Content-Type': 'application/json'} <class 'dict'>
方法3
使用 ast.literal_eval
进行转换既不存在使用 json
进行转换的问题,也不存在使用 eval
进行转换的 安全性问题
,因此推荐使用 ast.literal_eval
import ast headers = "{'Content-Type': 'application/json'}" headers = ast.literal_eval(headers) print(headers) print(type(headers))
响应结果:
{'Content-Type': 'application/json'} <class 'dict'>
原文地址:http://ww7.funhacks.net/