python 生成金字塔

num = eval(input("请输入一个整数："))
for i in range(, num + ):
    for j in range(num-i, , -):
        print(" ", end="\t")
    for j in range(i, , -):
        print(j, end="\t")
    for j in range(, i+):
        print(j, end="\t")
    print(" ")

显示