Python project "pong" without any makefile

[Larz60+]

Even no "idea" appears on Pycharm.

Each package that is maintained by PyCharm contains a .idea directory at the beginning of the package.
It's not a 'make' file, as nilamo and metulburr already stated, one would serve no purpose.
It contains information on encoding, project version, configuration, IDE editor style, etc.
in addition, if you use a VCS, there will be a file for that (I use Git, so there's a .git directory).