Remove boilerplate comments and unused variables (#2073)

sorts/cycle_sort.py

@@ -18,42 +18,32 @@ def cycle_sort(array: list) -> list:
     >>> cycle_sort([])
     []
     """
-    ans = 0
+    array_len = len(array)
+    for cycle_start in range(0, array_len - 1):
+        item = array[cycle_start]
 
-    # Pass through the array to find cycles to rotate.
+        pos = cycle_start
-    for cycleStart in range(0, len(array) - 1):
+        for i in range(cycle_start + 1, array_len):
-        item = array[cycleStart]
-
-        # finding the position for putting the item.
-        pos = cycleStart
-        for i in range(cycleStart + 1, len(array)):
             if array[i] < item:
                 pos += 1
 
-        # If the item is already present-not a cycle.
+        if pos == cycle_start:
-        if pos == cycleStart:
             continue
 
-        # Otherwise, put the item there or right after any duplicates.
         while item == array[pos]:
             pos += 1
+
         array[pos], item = item, array[pos]
-        ans += 1
+        while pos != cycle_start:
-
+            pos = cycle_start
-        # Rotate the rest of the cycle.
+            for i in range(cycle_start + 1, array_len):
-        while pos != cycleStart:
-
-            # Find where to put the item.
-            pos = cycleStart
-            for i in range(cycleStart + 1, len(array)):
                 if array[i] < item:
                     pos += 1
 
-            # Put the item there or right after any duplicates.
             while item == array[pos]:
                 pos += 1
+
             array[pos], item = item, array[pos]
-            ans += 1
 
     return array