Python File next() Method
The method next() is used when a file is used as an iterator, typically in a loop, the next() method is called repeatedly. This method returns the next input line, or raises StopIteration when EOF is hit.
Combining next() method with other file methods like readline() does not work right. However, using seek() to reposition the file to an absolute position will flush the read-ahead buffer.
Following is the syntax for next() method:
This method returns the next input line.
The following example shows the usage of next() method.
This is 1st line This is 2nd line This is 3rd line This is 4th line This is 5th line
#!/usr/bin/python # Open a file fo = open("foo.txt", "rw+") print "Name of the file: ", fo.name # Assuming file has following 5 lines # This is 1st line # This is 2nd line # This is 3rd line # This is 4th line # This is 5th line for index in range(5): line = fo.next() print "Line No %d - %s" % (index, line) # Close opend file fo.close()
When we run above program, it produces following result:
Name of the file: foo.txt Line No 0 - This is 1st line Line No 1 - This is 2nd line Line No 2 - This is 3rd line Line No 3 - This is 4th line Line No 4 - This is 5th line