When running __main__.py, get current module

Question

I'm creating a program that is executable via the packaged __main__.py and installed so I can run it simply as my_module_name from the command line. That all is working great.

I'm trying to configure a logger from that __main__.py file that is used hierarchically from sub-modules. The loggers in the sub-modules all get their logger by doing:

logger = logging.getLogger(__name__)

Which is great because name is my_module_name.Controllers.A, etc. I'm looking to setup my_module_name.Controllers from __main__.pybut I cant seem to find my_module_name anywhere while I'm debugging and executing __main__.py directly. I understand this is kind of funky because python doesn't really execute __main__.py as a module... but it's in the my_module_name directory.. Is it hacky to just grab that name? Am I going down the right path with this?

Thanks

Answer 1

TL;DR. Yes, you're basically already doing the right thing. :)

You cannot get "current module" when running __main__.py. This boils down to difference between module and (module executed as) script (or also "main module") the details of which are described in PEP-338:

In a main module, the value of __name__ is always '__main__'

There is an extra piece of information in PEP-366 regarding relative imports. __package__ attributed has been introduced. There is also this bit of information:

When the main module is specified by its filename, then the __package__ attribute will be set to None. To allow relative imports when the module is executed directly, boilerplate similar to the following would be needed before the first relative import statement:

if __name__ == "__main__" and __package__ is None: __package__ = "expected.package.name"

In other words. When being directly called, there module __name__ is "__main__" and __package__ attribute is None, you'd have to set it yourself for (relative imports to work or) any (other) use. You can try to guess, what should it based on __file__ or if stable, you can just write the name in.