Cannot import name 'SCHEME_KEYS' from 'pip._internal.models.scheme' Error

I want to install flask in my virtual environment . I used "pip install flask" commmand ,but I got this error:

raceback (most recent call last): File "C:\Users\user\anaconda3\lib\runpy.py", line 194, in _run_module_as_main return _run_code(code, main_globals, None, File "C:\Users\user\anaconda3\lib\runpy.py", line 87, in _run_code exec(code, run_globals) File "C:\Users\user\Desktop\news_bot\myvenv\Scripts\pip.exe\__main__.py", line 4, in <module> File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\cli\main.py", line 10, in <module> from pip._internal.cli.autocompletion import autocomplete File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\cli\autocompletion.py", line 9, in <module> from pip._internal.cli.main_parser import create_main_parser File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\cli\main_parser.py", line 7, in <module> from pip._internal.cli import cmdoptions File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\cli\cmdoptions.py", line 24, in <module> from pip._internal.cli.progress_bars import BAR_TYPES File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\cli\progress_bars.py", line 12, in <module> from pip._internal.utils.logging import get_indentation File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\utils\logging.py", line 18, in <module> from pip._internal.utils.misc import ensure_dir File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\utils\misc.py", line 31, in <module> from pip._internal.locations import ( File "c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\locations\__init__.py", line 7, in <module> from pip._internal.models.scheme import SCHEME_KEYS, Scheme
ImportError: cannot import name 'SCHEME_KEYS' from 'pip._internal.models.scheme' (c:\users\user\desktop\news_bot\myvenv\lib\site-packages\pip\_internal\models\scheme.py)

I had updated pip and after updation I am getting this error.

OS:Windows

Python version:3.8.5

Thanks :)

2 Answers

Since you use Anaconda, try:

conda install pip [--force-reinstall]

This worked for me. Other suggestion could be

python -m pip install --upgrade --force-reinstall pip

but this did not work for me, since pip tries to upgrade itself but runs into the same error.

Hope this helps!

You need to save get-pip.py file in the anaconda3\Scripts directory or anaconda3\envs\[env_name]\Scripts if you are working on virtual environment.

Then, you need to cd to this directory:

cd anaconda3\Scripts

After that run:

python get-pip.py pip==19.3.1 # or 21.0.1