update from Atlas with major reorg

11-iface-abc/lotto.py

@@ -1,3 +1,5 @@
+# BEGIN LOTTERY_BLOWER
+
 import random
 
 from tombola import Tombola
@@ -6,19 +8,23 @@ from tombola import Tombola
 class LotteryBlower(Tombola):
 
     def __init__(self, iterable):
-        self.randomizer = random.SystemRandom()  # <1>
-        self.clear()
-        self.load(iterable)
-
-    def clear(self):
-        self._balls = []
+        self._balls = list(iterable)  # <1>
 
     def load(self, iterable):
         self._balls.extend(iterable)
-        self.randomizer.shuffle(self._balls)  # <2>
 
     def pick(self):
-        return self._balls.pop()  # <3>
+        try:
+            position = random.randrange(len(self._balls))  # <2>
+        except ValueError:
+            raise LookupError('pick from empty BingoCage')
+        return self._balls.pop(position)  # <3>
 
     def loaded(self):  # <4>
-        return len(self._balls) > 0
+        return bool(self._balls)
+
+    def inspect(self):  # <5>
+        return tuple(sorted(self._balls))
+
+
+# END LOTTERY_BLOWER