File next( ) Method in Python 3
File object in Python 3 does not support next() method. Python 3 has a built-in function next() which retrieves the next item from the iterator
by calling its __next__() method. If default is given, it is returned if the
iterator is exhausted, otherwise StopIteration is raised. This method can be
used to read the next input line, from the file object.
Syntax
next(iterator[,default])
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Parameters
- iterator : file object from which lines are to be read
- default : returned if iterator exhausted. If not given, StopIteration is raised
Return Value
This method returns the next input line.
Example
Assuming
that 'foo.txt' contains following lines
C++
Java
Python
Perl
PHP
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#!/usr/bin/python3
# Open
a file
fo =
open("foo.txt", "r")
print
("Name of the file: ", fo.name)
for
index in range(5):
line = next(fo)
print ("Line No %d - %s" %
(index, line))
# Close
opened file
fo.close()
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When we run the above program, it produces the
following result-
Name of
the file: foo.txt
Line No
0 - C++
Line No
1 - Java
Line No
2 - Python
Line No
3 - Perl
Line No
4 – PHP
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