Python 3 - 文件 tell() 方法

  • 描述

    方法tell()返回文件中文件读/写指针的当前位置。
  • 句法

    以下是语法tell()方法 -
    
    fileObject.tell()
    
  • 参数

    NA
  • 返回值

    此方法返回文件中文件读/写指针的当前位置。
  • 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()
    
  • 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