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## Summary Part of https://github.com/astral-sh/ty/issues/168. Infer more precise types for collection literals (currently, only `list` and `set`). For example, ```py x = [1, 2, 3] # revealed: list[Unknown | int] y: list[int] = [1, 2, 3] # revealed: list[int] ``` This could easily be extended to `dict` literals, but I am intentionally limiting scope for now.
622 B
622 B
Sets
Basic set
reveal_type({1, 2}) # revealed: set[Unknown | int]
Set of tuples
reveal_type({(1, 2), (3, 4)}) # revealed: set[Unknown | tuple[int, int]]
Set of functions
def a(_: int) -> int:
return 0
def b(_: int) -> int:
return 1
x = {a, b}
reveal_type(x) # revealed: set[Unknown | ((_: int) -> int)]
Mixed set
# revealed: set[Unknown | int | tuple[int, int] | tuple[int, int, int]]
reveal_type({1, (1, 2), (1, 2, 3)})
Set comprehensions
reveal_type({x for x in range(42)}) # revealed: set[@Todo(set comprehension element type)]