What is ReadLine () python? ReadLine () Python Definition and usage parsing

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

Grammar

The ReadLine () method syntax is as follows:

Fileobject.readline ();

Parameters

Size-the number of bytes read from the file.

return value

Returns the bytes read from the string.

Instance

The following example demonstrates the use of the ReadLine () 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:

#-*-coding:utf-8-*-# Open File fo = open ("Runoob.txt", "rw+") print "file name:", Fo.nameline = Fo.readline () print "Read first line%s"% ( Line) line = Fo.readline (5) print "Read string:%s"% (line) # Close file Fo.close ()

The result of the above example output is:

The file name is:  Runoob.txt read the first line 1:www.runoob.com read the string is: 2:www

In this article, we understand what is the ReadLine () method, do not understand the words in fact, they can try to do, 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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