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Task/Sorting-algorithms-Bubble-sort/Python/sorting-algorithms-bubble-sort.py

@@ -0,0 +1,26 @@
+def bubble_sort(seq):
+    """Inefficiently sort the mutable sequence (list) in place.
+       seq MUST BE A MUTABLE SEQUENCE.
+
+       As with list.sort() and random.shuffle this does NOT return
+    """
+    changed = True
+    while changed:
+        changed = False
+        for i in xrange(len(seq) - 1):
+            if seq[i] > seq[i+1]:
+                seq[i], seq[i+1] = seq[i+1], seq[i]
+                changed = True
+    return None
+
+if __name__ == "__main__":
+   """Sample usage and simple test suite"""
+
+   from random import shuffle
+
+   testset = range(100)
+   testcase = testset[:] # make a copy
+   shuffle(testcase)
+   assert testcase != testset  # we've shuffled it
+   bubble_sort(testcase)
+   assert testcase == testset  # we've unshuffled it back into a copy