Initial data commit

Task/Sorting-algorithms-Cocktail-sort-with-shifting-bounds/Python/sorting-algorithms-cocktail-sort-with-shifting-bounds.py

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+"""
+
+Python example of
+
+http://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort_with_shifting_bounds
+
+based on
+
+http://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort#Python
+
+"""
+
+def cocktailshiftingbounds(A):
+    beginIdx = 0
+    endIdx = len(A) - 1
+
+    while beginIdx <= endIdx:
+        newBeginIdx = endIdx
+        newEndIdx = beginIdx
+        for ii in range(beginIdx,endIdx):
+            if A[ii] > A[ii + 1]:
+                A[ii+1], A[ii] = A[ii], A[ii+1]
+                newEndIdx = ii
+
+        endIdx = newEndIdx
+
+        for ii in range(endIdx,beginIdx-1,-1):
+            if A[ii] > A[ii + 1]:
+                A[ii+1], A[ii] = A[ii], A[ii+1]
+                newBeginIdx = ii
+
+        beginIdx = newBeginIdx + 1
+
+test1 = [7, 6, 5, 9, 8, 4, 3, 1, 2, 0]
+cocktailshiftingbounds(test1)
+print(test1)
+
+test2=list('big fjords vex quick waltz nymph')
+cocktailshiftingbounds(test2)
+print(''.join(test2))