python双循环打印菱形

可以使用以下代码实现双循环打印菱形：

n = int(input("请输入菱形的行数："))
for i in range(n):
    for j in range(n-i-1):
        print(" ", end="")
    for j in range(2*i+1):
        print("*", end="")
    print()
for i in range(n-2, -1, -1):
    for j in range(n-i-1):
        print(" ", end="")
    for j in range(2*i+1):
        print("*", end="")
    print()