# 我尝试了这样做
print(body.encode('gb2312'))
print(body.encode('utf-8'))
输出如下：
b'\xb3\xd0\xb5\xa3\xb5\xa5\xce\xbb\xa3\xba\xd5\xfe\xb7\xa8\xd1\xa7\xd4\xba'
b'\xe6\x89\xbf\xe6\x8b\x85\xe5\x8d\x95\xe4\xbd\x8d\xef\xbc\x9a\xe6\x94\xbf\xe6\xb3\x95\xe5\xad\xa6\xe9\x99\xa2'
#再令两个结果分别为gb2312和utf8
>>> gb2312.decode('utf-8')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb3 in position 0: invalid start byte

Look at the above error again, it is byte 0xa3
So I tried it several times on the terminal and found that the colon gb2312 encode

>>> b'\xa3\xba'.decode('gb2312')
'：'

So it should be that python uses the default utf-8 to decode the body of gb2312, so one way I can think of is to modify the default encoding value, which is the statement in the first line: # -*- coding: gb2312 -*-
Then the operation was successful. Is there anything else? method?

Python3

After decoding, the body should be unicode encoded, use the following method:

body = body.split(u'：')

Another encoding issue, you can refer to: Character Encoding for Human-Computer Interaction and Defeating Python Character Encoding in Five Minutes.

#! /usr/bin/env python
# -*- coding: utf-8 -*-

# 模仿你从网页获得的数据
data = "学分：1.5".decode("utf-8").encode('gb2312')
# data = u"学分：1.5".encode('gb2312')
print type(data)

body = data.decode('gb2312')
print type(body)    # unicode 类型

# 两种解决方案
print body.split(u'：')  # unicode 对应 unicode
print body.encode("utf-8").split("：")  # utf-8 对应 utf-8