P15 (**)リストの各要素を指定回数連続させる。
def repli(lista, num): return reduce(lambda l,v: l+[v for i in range(num)], lista, []) if isinstance(lista, list) else None if __name__ == "__main__": print repli("a", 3) == None print repli([], 0) == [] print repli(["a"], 0) == [] print repli(["a"], 1) == ["a"] print repli(["a"], 2) == ["a", "a"] print repli(["a", "b", "c"], 3) == ["a", "a", "a", "b", "b", "b", "c", "c", "c"]