Summary of four ways to downgrade Python from 3.10 to 3.8 on win10 system

Method 1: Use Anaconda to manage the environment

• Create a new virtual environment

  • Open Anaconda Prompt and enter the following command to create an environment with the specified Python version:

    conda create -n py38 python=3.8

  • After running, y/n appears, select y

  • Activate the environment:

    conda activate py38

  • Verified version:

    python --version

    Appear3.Success。

• Modify the Python version of the existing environment

  • Direct downgrade in existing environments (maybe incompatible, use with caution):

    conda install python=3.8

  • If the installation fails, it is recommended to use the new environment instead of downgrading directly.

Method 2: Manually install Python 3.8 and configure environment variables

• Uninstall Python 3.10 (optional)

  • Uninstall Python 3.10 through Control Panel, but keep other dependencies (skip this step if you need to keep packages).

• Install Python 3.8

  • fromPython official websiteDownload the Python 3.8 installation package.

  • Check it during installationAdd Python 3.8 to PATH, ensure that environment variables are automatically configured.

• Verify installation

  • Open a command prompt and enter:

    python --version

  • If it is displayed as 3., the installation is successful.

Method 3: Use pyenv-win to manage multiple versions

• Install pyenv-win

  pip install pyenv-win -i /simple

• Configure environment variables

  Will%USERPROFILE%\.pyenv\pyenv-win\binand%USERPROFILE%\.pyenv\pyenv-win\shimsAdd to system variablesPATHmiddle.

• Install and switch Python 3.8

  pyenv install 3.8.10
  pyenv global 3.8.10

Method 4: Use the virtual environment isolation version

• Create a virtual environment through venv

  python -m venv py38_env

• Activate the environment and install dependencies

  • Activate the environment:

    .\py38_env\Scripts\activate

  • Install the required packages:

    pip install package_name

Things to note

• Dependency compatibility

  Downgrading Python may cause some libraries to be incompatible (such as TensorFlow requires Python ≤3.8, but some libraries may only support higher versions).

• Path priority

  If there are multiple Python versions in the system, you need to ensure environment variablesPATHThe path priority of Python 3.8 is higher than 3.10.

• Backup data

  It is recommended to back up important projects before operation, or isolate different version requirements through a virtual environment.

Summarize

• Recommended to use Anaconda or virtual environment, avoid global version conflicts.

• Manual installation or pyenvSuitable for users who need a fixed global version.

• If you need to further adjust the dependencies, please refer toPython 3.8 official documentationOr related community tutorials.

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