The name mangling is what is being referred to. Specifically, you can access it as Sekrit()._Sekrit__hello(), but that's a pretty obvious boundary-break compare

The name mangling is what is being referred to. Specifically, you can access it as Sekrit()._Sekrit__hello(), but that's a pretty obvious boundary-break compared to .__hello(). Members ending in a double underscore as well aren't mangled, because this interferes with syntax sugar methods like __add__ (addition operator overloading).