Tutorial on manipulating files in Python using the next () method

Next () method when a file is used as an iterator, a typical example is used in a loop, and the next () method is called repeatedly. This method returns the next input row, or the stopiteration exception is thrown when EOF is hit.

The method with other files, such as ReadLine (), is not working properly with the next () method. However, Usingseek () repositions the file to an absolute location refreshes the read-ahead buffer.
Grammar

The following is the syntax for the next () method:

Parameters

• NA

return value

This method returns the next input row.
Example

The following example shows the use of the next () method.

#!/usr/bin/python# Open a filefo = open ("Foo.txt", "rw+") print "Name of the file:", fo.name# assuming file has following 5 lines# This was 1st line# this is 2nd line# This is 3rd line# This is 4th line# this is 5th linefor index in range (5): 
  line = Fo.next ()  print "line No%d-%s"% (index, line) # Close opend filefo.close ()

When we run the above program, it produces the following results:

Name of the File:foo.txtLine no 0-this is 1st Lineline no 1-this are 2nd lineline no 2-this is 3rd lineline no 3-t He is 4th Lineline No 4-this are 5th line

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