def product(x,number): m = int(len(number)) i = 0 if m == 0: return x else: while i < m: x = x number[i] i = i+1 return x print('product(5) =', product(5)) print('product(5, 6) =', product(5, 6)) print('product(5, 6, 7) =', product(5, 6, 7)) print('product(5, 6, 7, 9) =', product(5, 6, 7, 9)) 能成功运行