T = TypeVar("T", bound=str)
def foo(a: T, b: T) -> T:
return a + b
print(foo("1", "2"))
mypy:
error: Incompatible return value type (got "str", expected "T") [return-value]
I dont understand how to fix this problem(using bound).
mypy Incompatible return value type with TypeVar(bound=str)
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