Python 3 File tell()用法及代码示例

描述

方法tell()返回文件读/写指针在文件中的当前位置。

用法

以下是语法tell()方法≫

fileObject.tell()

参数

NA

返回值

此方法返回文件读/写指针在文件中的当前位置。

示例

下面的例子展示了 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