Moved 20 to 26 to Python.

python/e024.py

@@ -1,2 +1,31 @@
 from itertools import permutations
-print("".join(list(permutations("0123456789"))[1000000-1]))
+
+
+def euler_024_library():
+    return int("".join(list(permutations("0123456789"))[1000000 - 1]))
+
+
+def permutations_(iterable):
+    if not iterable:
+        yield iterable
+    for i in range(len(iterable)):
+        elem = iterable[i:i + 1]
+        rest = iterable[:i] + iterable[i + 1:]
+        for ps in permutations_(rest):
+            yield elem + ps
+
+
+def n_th(generator, n):
+    for i in range(n):
+        next(generator)
+    return next(generator)
+
+
+def euler_024():
+    g = permutations_("0123456789")
+    return int(n_th(g, 1000000 - 1))
+
+
+if __name__ == "__main__":
+    print("e024.py: {}".format(euler_024()))
+    assert(euler_024() == 2783915460)