Python 3 - 文件 tell() 方法

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  描述

  方法tell()返回文件中文件读/写指针的当前位置。
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  句法

  以下是语法tell()方法 -

  
  fileObject.tell()
  

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  参数

  NA
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  返回值

  此方法返回文件中文件读/写指针的当前位置。
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  例子

  以下示例显示了 tell() 方法的用法。

  
  Assuming that 'foo.txt' file contains following text:
  This is 1st line
  This is 2nd line
  This is 3rd line
  This is 4th line
  This is 5th line
  

  
  #!/usr/bin/python3
  fo = open("foo.txt", "r+")
  print ("Name of the file: ", fo.name)
  line = fo.readline()
  print ("Read Line: %s" % (line))
  pos=fo.tell()
  print ("current position : ",pos)
  # Close opened file
  fo.close()
  

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  结果

  当我们运行上面的程序时，它会产生以下结果 -

  
  Name of the file:  foo.txt
  Read Line: This is 1st line
  Current Position: 18