下面Python代码实现输出如下图形，应该在横线处填入的代码是（ ）【注：字符串乘以一个正整数，相当于相同字符重复】。
A：(n % 2 == 1 and i == mid_row) or (n % 2 == 0 and (i == mid_row - 1 or i == mid_row))
B：(n % 2 == 0 and i == mid_row) or (n % 2 == 1 and (i == mid_row - 1 or i == mid_row))
C：n % 2 == 1 and i == mid_row) or (n % 2 == 0 and (i == mid_row or i == mid_row + 1))
D：(n % 2 == 1 and i == mid_row) or (n % 2 == 0 and i == mid_row - 1) or (n % 2 == 0 and i == mid_row)
正确答案：A
试卷来源：202509 CCF-GESP编程能力等级认证Python二级真题