Allow unary +
in integer Literals
#1551
Labels
topic: feature
Discussions about new features for Python's type annotations
+
in integer Literals
#1551
Currently a declaration
sign: Literal[-1, +1]
is not allowed, because the spec forbids expressions as literal values. There is an explicit exception for unary minus, but no corresponding exception for unary plus.Even if the issue can be easily worked around (by declaring something like
sign: Literal[-1, 1]
), the original version is more clear, because in some domains explicitly specifying the sign of positive numbers is more natural. Allowing a unary plus wouldn't just be more consistent, but would enhance clarity, and the impact on other users and on type-checker implementers would be quite small.PR with proposed change: #1550
Note: discussed on https://discuss.python.org/t/signed-values-in-literal-type/39919
The text was updated successfully, but these errors were encountered: