If your package isn't only a library, but has a piece of code that can be used either as a showcase or a standalone application when your package is installed, put that piece of code into
__main__.py in the
package_name folder. This way you will be able to run it directly from console:
python -m package_name
If there's no
__main__.py file available, the package won't run with this command and this error will be printed:
python: No module named
package_name.__main__;'package_name' is a package and cannot be directly executed.