test-data/unit/check-underscores.test - third_party/github.com/python/mypy - Git at Google

 [case testUnderscoresBasics]
 x: int
 x = 1000_000
 x = 0x_FF_FF_FF_FF
 y: str = 1000_000.000_001  # E: Incompatible types in assignment (expression has type "float", variable has type "str")
	[case testUnderscoresBasics]
	x: int
	x = 1000_000
	x = 0x_FF_FF_FF_FF
	y: str = 1000_000.000_001 # E: Incompatible types in assignment (expression has type "float", variable has type "str")