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zenomac
V2EX  ›  Python

将readlines()作为list操作一次之后 为什么会自动清空

  •  
  •   zenomac · Aug 21, 2012 · 3752 views
    This topic created in 5152 days ago, the information mentioned may be changed or developed.
    比如
    open_file.readlines().index('thestring')或者var=open_file.readlines()

    然后open_file.readlines()返回的都是空列表

    不太理解.
    2 replies  •  1970-01-01 08:00:00 +08:00
    ratazzi
        1
    ratazzi  
    PRO
       Aug 21, 2012   ❤️ 1
    毕竟是文件读取操作,读取之后指针会移动的
    0bit
        2
    0bit  
       Aug 21, 2012
    楼上正解
    想回到文件头部重新开始读取的话,用open_file.seek(0)
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