Perfectly solve the problem of "ModuleNotFoundError: No module named 'pip._internal.cli.main" when using pip under python

fix pip

When I installed " wxPython " on the Raspberry Pi, the terminal reported an error: ModuleNotFoundError: No module named 'pip._internal.cli.main

For this problem, two lines of code solve the problem and repair pip

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

After the repair:

Then you can use the pip command normally.

Perfect solution! !