python - 编辑文本文件 [英] python - edit a text file

问题描述

我正在使用 python，我想从文本文件的末尾删除一些字符.该文件很大，我不想阅读所有内容并复制有趣的部分.我最好的猜测是我需要更改文件大小....

I am using python and i want to delete some characters from the end of a text file. The file is big a and i dont want to read all of it and duplicate the interesting part. My best guess is that i need to change the file size....

谁能帮帮我谢谢

推荐答案

我猜你需要打开文件，查找到最后，删除字符并保存.

I guess that you need to open the file, seek to the end, delete characters and save it.

seek ( http://docs.python.org/library/stdtypes.html#file.seek ) 接受负值(例如 f.seek(-3, os.SEEK_END) 将位置设置为倒数第三个)，以便您可以轻松地到文件末尾.

seek ( http://docs.python.org/library/stdtypes.html#file.seek ) accepts negative values (e.g. f.seek(-3, os.SEEK_END) sets the position to the third to last), so that you can easily go to the end of your file.

http://docs.python.org/library/stdtypes.html#file-objects - 这个链接可能是一个很好的起点.

http://docs.python.org/library/stdtypes.html#file-objects - this link may be a good starting point.

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