Well it’s like that by accident in 3.6 because cpython36 does it this way and no other implementation exists. In 3.7 it’s officially a part of the spec thus req

Well it’s like that by accident in 3.6 because cpython36 does it this way and no other implementation exists. In 3.7 it’s officially a part of the spec thus required by all Python 3.7 compatible implementations and not just cpython.