sorts: type exchange sort for comparable items

sorts/exchange_sort.py

@@ -1,4 +1,11 @@
-def exchange_sort(numbers: list[int]) -> list[int]:
+from typing import Protocol
+
+
+class Comparable(Protocol):
+    def __lt__(self, other: object, /) -> bool: ...
+
+
+def exchange_sort[T: Comparable](numbers: list[T]) -> list[T]:
     """
     Uses exchange sort to sort a list of numbers.
     Source: https://en.wikipedia.org/wiki/Sorting_algorithm#Exchange_sort
@@ -12,7 +19,12 @@ def exchange_sort(numbers: list[int]) -> list[int]:
     [-2, 0, 3, 5, 10]
     >>> exchange_sort([])
     []
-    """
+
+    >>> exchange_sort(["d", "a", "c", "b"])
+    ['a', 'b', 'c', 'd']
+    >>> exchange_sort([2.5, -1.0, 0.0])
+    [-1.0, 0.0, 2.5]
+"""
     numbers_length = len(numbers)
     for i in range(numbers_length):
         for j in range(i + 1, numbers_length):

tests/test_sorts.py

@@ -96,6 +96,7 @@ def test_sort_matches_builtin(sort, case):
         bubble_sort_iterative,
         bubble_sort_recursive,
         insertion_sort,
+        exchange_sort,
     ],
     ids=lambda f: f.__name__,
 )