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I'm using python3.8.6 and I need to upgrade to 3.9.x.
After upgrade the python, myproject.py cannot find a module that already installed using pip3 install opencv-python.
when run python3 myproject.py occurs error that ModuleNotFoundError tensorflow, and tensorflow should be 2.5.x so I'm trying to install python 3.9.x.
pip --version shows pip 20.0.2 from /usr/lib/python3/dist-packages/pip (python 3.8) How can I change that (python3.8) to (python3.9)?

sorry for my bad English..

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  • Does this answer your question? How to upgrade all Python packages with pip Commented Aug 19, 2021 at 3:12
  • If python3 already points to your python3.9, then simply do python3 -m pip <list/install> to run pip commands specifically for that version of python Commented Aug 19, 2021 at 7:26

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python -m pip install –upgrade pip.

If you type pip list it will show you every package installed and should say something like WARNING: You are using pip version 21.2.3; however, version 21.2.4 is available. You should consider upgrading via this command:

c:\users\x\python.exe -m pip install --upgrade pip
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