Different programming languages have different package management tools.

For Python, pip is the package installer. pip package itself can also be used to list all the installed packages in the system. However that doesn't work anymore in the latest versions. You can use pkg_resources package to get the same information. You can also use help function to list all the installed modules.

help('modules')

Code snippet

import pkg_resources
for d in pkg_resources.working_set:
    print(d.project_name, d.version)