Why ParseException(s, l, str(ve)) and how to solve it

The reason for the error

In python, pip appears "ParseException(s, l, str( ve))" errors are usually caused by the pip version being too low or the network connection problem. You can try to update the pip version or check the network connection.

How to solve

Here are some ways to solve this error:

Update pip: Use the command "Python -m pip install --upgrade pip " to update pip version

Check the network connection: Make sure the network connection is stable and you can access pypi.org

Use a proxy: If your network requires a proxy, please set the proxy in the command line, for example ： pip install --proxy Http://proxy.example.com:8080 package_name

Clean upcache: Use the command "pip cache purge" to clear the pip cache

Use domestic mirroring: Use domestic sources to install, for example: pip install -i https://pypi.tuna.tsinghua.edu.cn/simple package_name

If None of the above methods can solve the problem. It is recommended to check the log file to see if there is more detailed error information.

Usage example

When you install a package, if you are prompted with a "ParseException(s, l, str(ve))" error, you can try the following method to solve it

Update pip version:

python -m pip install --upgrade pip

Use domestic mirror:

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple package_name

Clear cache:

pip cache purge

For example, if you get an error when installing the numpy package, you can try the following command:

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numpy

If your network requires a proxy, you can add --proxy to the above command.

Please note that these commands and examples are based on windows systems and may be different in linux and Mac systems.

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