求解PYTHON字母等腰三角形代码。

输入一大写英文字母×（A”<=X<="Z”），输出X到A的倒等腰三角形。
输入格式:
输入在一行中给出1个大写字母X
输出格式：
出由大写字母组成的倒等腰三角形
输入样例:
D
输出样例:

"""
-*- coding:utf-8 -*-
Author：yang-roc
QQ:327844461
Email：aida_pc@qq.com
Time: 2021-07-26
"""
X = input("请输入X:")
if "A" <= X <= "Z":
    k = ord(X) - ord('A') + 1
    n = 2 * k - 1
    for i in range(n, 0, -2):
        s = X * i
        t = (n - len(s)) // 2
        res = " " * t + s + " " * t
        print(res, end='')
        print()
        X = chr(ord(X) - 1)

"""
-*- coding:utf-8 -*-
Author：yang-roc
QQ:327844461
Email：aida_pc@qq.com
Time: 2021-07-26
"""
X = input("请输入X:")
if "A" <= X <= "Z":
    k = ord(X) - ord('A') + 1
    n = 2 * k - 1
    m = n
    while n > 0:
        s = X * n
        t = (m - len(s)) // 2
        res = " " * t + s + " " * t
        print(res, end='')
        print()
        n = n - 2
        X = chr(ord(X) - 1)