Update sorts/bead_sort.py

Co-authored-by: Christian Clauss <cclauss@me.com>

sorts/bead_sort.py

@@ -31,9 +31,9 @@ def bead_sort(sequence: list) -> list:
     if any(not isinstance(x, int) or x < 0 for x in sequence):
         raise TypeError("Sequence must be list of non-negative integers")
     for _ in range(len(sequence)):
-        for i in range(len(sequence) - 1):
-            if sequence[i] > sequence[i + 1]:
-                sequence[i], sequence[i + 1] = sequence[i + 1], sequence[i]
+        for i, (rod_upper, rod_lower) in enumerate(pairwise(sequence)):
+            if rod_upper > rod_lower:
+                sequence[i], sequence[i + 1] = rod_lower, rod_upper
     return sequence