mypy/experiments.py - third_party/github.com/python/mypy - Git at Google

 from typing import Optional, Tuple
 STRICT_OPTIONAL = False
 find_occurrences = None  # type: Optional[Tuple[str, str]]
	from typing import Optional, Tuple
	STRICT_OPTIONAL = False
	find_occurrences = None # type: Optional[Tuple[str, str]]