pip uses incorrect cached package version, instead of the user-specified version

Here is an example of how to use pip to install a specific version of a package, rather than using a cached version:

pip install package_name==version_number

For example, if you want to install version 2.3 of the package "requests":

pip install requests==2.3

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You can also use > or < to specify a range of versions that you want to install

pip install package_name>=version_number
pip install package_name<=version_number

Additionally, you can use pip install --no-cache-dir package_name to force pip to ignore the cache and install the package again.