To Read The Next Line Of The File In Python
Last Updated : Jul 1, 2023
IN - Python
In this article we will show you the solution of to read the next line of the file in python, Python's next() file method is used when a file is being iterated. It is typically called repeatedly as part of a loop.
A StopIteration condition is triggered when the EOF is reached that causes this method to return the next input line.
When the next() method is used in combination with other file methods like readline(), it does not work correctly.
Read-ahead buffers are flushed when seek() is used to reposition a file to an absolute position. We will now discuss the idea of read the next line of the file in python with example.
Step By Step Guide On To Read The Next Line Of The File In Python :-
#!/usr/bin/python # Open a file fo = open("foo.txt", "rw+") print "Name of the file: ", fo.name for index in range(15): line = fo.next() print "Line No %d - %s" % (index, line) # Close open file fo.close()
- A Python interpreter is used in this script, which is specified in the first line, "#!/usr/bin/python.".
- As shown in the second line of the code, "fo = open("foo.txt", "rw+")" declares a variable "fo" that will store the results of opening "foo.txt" both in read-only and in write-only modes.
- We just open a file called "Foo.txt", so the third line "print "Name of the file: ", fo.name" prints its name.
- The following five lines begin with "for index in range(5):" and go on to read each line of the file one at a time, printing the line number along with it.
- In this case, "line = fo.next()" means to read the next line from the file and store it in the variable "line".
- Printing the line number (stored in the variable "index") and reading the line from the file (stored in the variable "line") will be done inside the loop.
- The final step in the process is closing the file once the entire file has been read via the "fo.close()" statement.
As a result, we have successfully learned read the next line of the file in python.
Using readlines() or readline() and looping over lines in a file object is a good way to iterate lines from the file.
The program is fast when you read the same line repeatedly or if you read the same line from a number of files at the same time.
It is not necessary to load the entire file into memory when working with large files by using a loop and enumerate().
I hope this article on to read the next line of the file in python helps you and the steps and method mentioned above are easy to follow and implement.