ch15: draft examples

15-more-types/erp.py

@@ -0,0 +1,14 @@
+import random
+from typing import TypeVar, Generic, List, Iterable
+
+
+T = TypeVar('T')
+
+
+class EnterpriserRandomPopper(Generic[T]):
+    def __init__(self, items: Iterable[T]) -> None:
+        self._items: List[T] = list(items)
+        random.shuffle(self._items)
+
+    def pop_random(self) -> T:
+        return self._items.pop()