This is not exactly true. We can alleviate the GIL issue by releasing it inside C extensions, true, but it is still there nonetheless. Incidentally, one of the big advantage of the GIL is to make C extensions easier to write.
As long as you are not creating or destroying the Python objects you expect to give back to the Python side of your program, you don't have to care much about it.
As long as you are not creating or destroying the Python objects you expect to give back to the Python side of your program, you don't have to care much about it.