两个文件若行内容相同但顺序相反则互为镜像。给两个文件名参数，恰好输出一行：
- 行数不同 →
Not mirrored: different number of lines: A versus B - 否则第一处不同 →
Not mirrored: line K different（第一个文件的行号） - 否则 →
Mirrored
Python only; no external programs / subprocess. From COMP2041/9044 21T2 Final.
两个文件若行内容相同但顺序相反则互为镜像。给两个文件名参数，恰好输出一行：
Not mirrored: different number of lines: A versus BNot mirrored: line K different（第一个文件的行号）MirroredPython only; no external programs / subprocess. From COMP2041/9044 21T2 Final.