python for绘制图形-楼梯

 要求

 结果

 代码

# 创建梯子
def createStairs(num):
    if num == 1:
        print('+-', end="+\n")
        print('| ', end="|\n")
        print('+-', end="+\n")
    else:
        num_len = num + 1
        for i in range(1, num_len):
            if i == 1:
                print(' ' * ((num - i) * 2), end="")
                print('+-', end="+\n")
                print(' ' * ((num - i) * 2), end="")
                print('| ', end=