Modulenotfounderror: no module named 'pip' solution

pip The download speed is slow, and the solution of modifying the domestic image ：https://blog.csdn.net/MyNameIsWangYi/article/details/123712400
abnormal ：

D:\0725\bdp-agent>pip3 install -r requirements.txt
Traceback (most recent call last):
  File "d:\software\python-3.8.2\lib\runpy.py", line 193, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "d:\software\python-3.8.2\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "D:\software\python-3.8.2\Scripts\pip3.exe\__main__.py", line 5, in <module>
ModuleNotFoundError: No module named 'pip'

terms of settlement ：

python -m ensurepip
python -m pip install --upgrade pip