Python's file Tell () method usage and function parsing (instance)

In this article, let's look at the python Tell Method, before we enter the article, we first need to know Pythontell ()What is it Tell ()It can be used in Python programming where it can play a role. These things we can all learn in today's article.

Overview

The Tell () method returns the current position of the file, which is the current position of the file pointer.

Grammar

The tell () method syntax is as follows:

Fileobject.tell (offset[, whence])

return value

Returns the current location of the file.

Instance

The following example demonstrates the use of the Tell () method:

The contents of the file Runoob.txt are as follows:

1:www.runoob.com2:www.runoob.com3:www.runoob.com4:www.runoob.com5:www.runoob.com

To iterate through the contents of a file:

#!/usr/bin/python#-*-coding:utf-8-*-# Open File fo = open ("Runoob.txt", "rw+") print "file name:", Fo.nameline = Fo.readline () pri NT "read data:%s"% (line) # Get current file location pos = Fo.tell () print "Current position:%d"% (POS) # Close File Fo.close ()

The result of the above example output is:

The file name is:  runoob.txt The data read is: 1:www.runoob.com current Position: 17

In this article, we explain what is the tell () method, do not understand the words can be hands-on to try, after all, hands-on practice is the best way to verify the learning. Finally, I hope that this article will give you a little help in learning about Python.

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