September Morn Update

Task/Permutations/Python/permutations-5.py

@@ -0,0 +1,13 @@
+def permutations(xs):
+    ac = [[]]
+    for x in xs:
+        ac_new = []
+        for ts in ac:
+            for n in range(0,ts.__len__()+1):
+                new_ts = ts[:]  #(shallow) copy of ts
+                new_ts.insert(n,x)
+                ac_new.append(new_ts)
+        ac=ac_new
+    return ac
+
+print(permutations([1,2,3,4]))