How to do it...

1. Use pip to pull the latest version of the package directly from PyPI:

      $ pip install <package_name>

1. Alternately, a specific version of the package can be downloaded:

      $ pip install <package_name>==1.2.2

Here is an example of downgrading pygments from our earlier install in pipenv:

1. As a final option, a minimum version of a package can be downloaded; this is common when a package has a significant change between versions:

      $ pip install "<package_name> >= 1.1"

1. If a PyPI package has a wheel file available, pip will automatically download the wheel; otherwise, it will pull the source code and compile it.

      $ pip install <some_package>

1. To install a local wheel file, provide the full path to the file:

      $ pip install /local_files/SomePackage-1.2-py2.py3-none-any.whl