Merge branch '2025-typehints'

Author: egges

2025/typehints/generic_return.py

@@ -0,0 +1,17 @@
+from collections.abc import Iterable
+
+
+def calculate_discounts(items: Iterable[float], discount: float) -> Iterable[float]:
+    return [item * (1 - discount) for item in items]
+
+
+def main() -> None:
+    items = [100, 200, 300]
+    discount = 0.2
+    discounted_items = calculate_discounts(items, discount)
+    print(len(discounted_items))  # type issue here
+    print(discounted_items[0])  # type issue here
+
+
+if __name__ == "__main__":
+    main()

2025/typehints/pyproject.toml

@@ -0,0 +1,12 @@
+[project]
+name = "typehints"
+version = "0.0.1"
+authors = [{name = "ArjanCodes"}]
+license = {text = "MIT"}
+requires-python = ">=3.12"
+dependencies = [
+    "mypy>=1.15.0",
+]
+
+[tool.pytest.ini_options]
+pythonpath = "src"