prefix = os.path.commonprefix([abs_directory, abs_target])
For horizontal movement we can do even better. If your snake is moving to the right, we start by deleting every character on the left edge of the screen and inserting a new one on the right edge. After that, we do our patching (if needed). This automatically moves fruit into the correct position without us even needing to reprint it!。体育直播对此有专业解读
，这一点在heLLoword翻译官方下载中也有详细论述
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