Python3.6 pip installation fails under Windows UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5

For example, pip install flask fails

Exception:
Traceback (most recent call last):
  File "d:\codetest\v\lib\site-packages\pip\compat\__init__.py", line 73, in console_to_str
    return s.decode(sys.__stdout__.encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5 in position 2: invalid continuation byte

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\codetest\v\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "d:\codetest\v\lib\site-packages\pip\commands\install.py", line 342, in run
    prefix=options.prefix_path,
  File "d:\codetest\v\lib\site-packages\pip\req\req_set.py", line 784, in install
    **kwargs
  File "d:\codetest\v\lib\site-packages\pip\req\req_install.py", line 878, in install
    spinner=spinner,
  File "d:\codetest\v\lib\site-packages\pip\utils\__init__.py", line 676, in call_subprocess
    line = console_to_str(proc.stdout.readline())
  File "d:\codetest\v\lib\site-packages\pip\compat\__init__.py", line 75, in console_to_str
    return s.decode('utf_8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5 in position 2: invalid continuation byte

All solutions on the Internet are nothing more than two

1. Modify site-packages\pip \ compat_init_.py
2. change a shell

In the final analysis, it is caused by the default encoding of CMD. There is actually a simple solution.

chcp 65001

After entering the above command, use pip to install it, and you can succeed. You can refer to this solution for other utf8 errors under cmd.