import sys from typing import List class _Feature: def getOptionalRelease(self) -> sys._version_info: ... def getMandatoryRelease(self) -> sys._version_info: ... absolute_import: _Feature division: _Feature generators: _Feature nested_scopes: _Feature print_function: _Feature unicode_literals: _Feature with_statement: _Feature if sys.version_info >= (3, 0): barry_as_FLUFL: _Feature if sys.version_info >= (3, 5): generator_stop: _Feature if sys.version_info >= (3, 7): annotations: _Feature all_feature_names: List[str]