Python中tell()方法的使用详解

tell()方法返回的文件内的文件读/写指针的当前位置。
语法

以下是tell()方法的语法：

fileObject.tell()

参数

返回值

此方法返回该文件中读出的文件/写指针的当前位置。
例子

下面的例子显示了tell()方法的使用。

#!/usr/bin/python/' target='_blank'>python# Open a filefo = open("foo.txt", "rw+")print "Name of the file: ", fo.name# Assuming file has following 5 lines# This is 1st line# This is 2nd line# This is 3rd line# This is 4th line# This is 5th lineline = fo.readline()print "Read Line: %s" % (line)# Get the current position of the file.pos = fo.tell()print "Current Position: %d" % (pos)# Close opend filefo.close()

当我们运行上面的程序，它会产生以下结果：

Name of the file: foo.txtRead Line: This is 1st lineCurrent Position: 18