Shortened code (#3855)

searches/quick_select.py

@@ -44,8 +44,7 @@ def quick_select(items: list, index: int):
     if index >= len(items) or index < 0:
         return None
 
-    pivot = random.randint(0, len(items) - 1)
-    pivot = items[pivot]
+    pivot = items[random.randint(0, len(items) - 1)]
     count = 0
     smaller, equal, larger = _partition(items, pivot)
     count = len(equal)