readline()) #By calling readline() two times, you can read the two first linesīy looping through the lines of the file, you can read the whole file, line by line : readline()) #You can return one line by using the readline() method read(6)) #Return the 6 first characters of the file

You can a read a file different ways here we discus some basic ways so let's start: Example 1 : This messege from demo_file.txt and this is testing purposes. The open() function returns a file object, which has a read() method for reading the content of the file:ĭemo_file.txt Hello! Welcome to To open the file, use the built-in open() function. Note : Make sure the file exists, or else you will get an error.

To open a file for reading it is enough to specify the name of the file: f = open('demo_file.txt') and f = open('demo_file.txt', 'rt')īecause ' r ' for read, and ' t ' for text are the default values, you do not need to specify them. In addition you can specify if the file should be handled as binary or text mode :

' x ' - Create - Creates the specified file, returns an error if the file exists.

' w ' - Write - Opens a file for writing, creates the file if it does not exist.

' a ' - Append - Opens a file for appending, creates the file if it does not exist.

Opens a file for reading, error if the file does not exist There are four different methods (modes) for opening a file: The open() function takes two parameters filename, and mode. The key function for working with files in Python is the open() function. Python has several functions for creating, reading, updating, and deleting files. File handling is an important part of any web application.

Python create and write to file