In the case of transferred characters, \=.

The original poster said no, so I tested it specifically.

a = '{"code":"A00185","data":"\u5bf9\u4e0d\u8d77\uff0c\u60a8\u77ed\u65f6\u95f4\u53d1\u8868\u535a\u6587\u8fc7\u591a\uff0c\u8bf7\u591a\u4f11\u606f\uff0c\u6ce8\u610f\u8eab\u4f53\uff01\u611f\u8c22\u60a8\u5bf9\u65b0\u6d6a\u535a\u5ba2\u7684\u652f\u6301\u548c\u5173\u6ce8\uff01"}'
b = a.replace('\','hehehehe')
print(b);

The result is

{"code":"A00185","data":"heheheheu5bf9heheheheu4e0dheheheheu8d77heheheheuff0cheheheheu60a8heheheheu77edheheheheu65f6heh
heheu95f4heheheheu53d1heheheheu8868heheheheu535aheheheheu6587heheheheu8fc7heheheheu591aheheheheuff0cheheheheu8bf7hehehe
eu591aheheheheu4f11heheheheu606fheheheheuff0cheheheheu6ce8heheheheu610fheheheheu8eabheheheheu4f53heheheheuff01heheheheu
11fheheheheu8c22heheheheu60a8heheheheu5bf9heheheheu65b0heheheheu6d6aheheheheu535aheheheheu5ba2heheheheu7684heheheheu652
heheheheu6301heheheheu548cheheheheu5173heheheheu6ce8heheheheuff01"}

I saw the code snippet in the poster’s new post, and after updating it, the poster turned red without seeing the code prompt?

a.replace('\','\')

This sentence is originally written incorrectly because '转义将一个右引号转义了之后，第二个字符串就不完整了，当然会报错。
另外，按照题主的要求，本来就不需要替换，因为这个字符串本来就是一个，在定义字符串的时候，写两个\，才等于真正的一个.
Can be verified with the following code:

a = '{"code":"A00185","data":"\u5bf9\u4e0d\u8d77\uff0c\u60a8\u77ed\u65f6\u95f4\u53d1\u8868\u535a\u6587\u8fc7\u591a\uff0c\u8bf7\u591a\u4f11\u606f\uff0c\u6ce8\u610f\u8eab\u4f53\uff01\u611f\u8c22\u60a8\u5bf9\u65b0\u6d6a\u535a\u5ba2\u7684\u652f\u6301\u548c\u5173\u6ce8\uff01"}'
print(a);

Output results

{"code":"A00185","data":"\u5bf9\u4e0d\u8d77\uff0c\u60a8\u77ed\u65f6\u95f4\u53d1\u8868\u535a\u6587\u8fc7\u591a\uff0c\u8bf
7\u591a\u4f11\u606f\uff0c\u6ce8\u610f\u8eab\u4f53\uff01\u611f\u8c22\u60a8\u5bf9\u65b0\u6d6a\u535a\u5ba2\u7684\u652f\u630
1\u548c\u5173\u6ce8\uff01"}

After several negotiations, I finally found out the purpose of the question, which is to parse out the Chinese in json. . .

It’s very simple

import json
a = '{"code":"A00185","data":"\u5bf9\u4e0d\u8d77\uff0c\u60a8\u77ed\u65f6\u95f4\u53d1\u8868\u535a\u6587\u8fc7\u591a\uff0c\u8bf7\u591a\u4f11\u606f\uff0c\u6ce8\u610f\u8eab\u4f53\uff01\u611f\u8c22\u60a8\u5bf9\u65b0\u6d6a\u535a\u5ba2\u7684\u652f\u6301\u548c\u5173\u6ce8\uff01"}'
js = json.loads(a)
print (js)

Output

{'data': '对不起，您短时间发表博文过多，请多休息，注意身体！感谢您对新浪博客的支持和关注！', 'code': 'A00185'}