What is the difference between read and readline in Python?

356    Asked by DanielCameron in Python , Asked on Jan 10, 2024

 I am working on a text processing script using Python programming language in which I need to read the data from a particular file, however, I am confused about using between readline and read function for this particular task. What is the difference between these two functions? 

Answered by Daniel Cameron

 In the context ofPython programming language, the difference between read and readline if given the following:-

  Read()

This method is used in reading the entire content of a particular file. It mainly reads the content of the file as a string or bytes Object, which depends upon the mode of the file.

  Readline ()

This method or function is used in reading a single line from a particular file.

Here is the example given in the form of a coding analogy to showcase the difference:-

# Opening a file in read mode
File_path = ‘example.txt’
With open(file_path, ‘r’) as file:
    # Using read() to read the entire content of the file
    Content = file.read()
    Print(“Content using read():”)
    Print(content)
With open(file_path, ‘r’) as file:
    # Using readline() to read the file line by line
    Print(“
Content using readline():”)
    Line = file.readline()
    While line:
        Print(line, end=’’)
        Line = file.readline()

Therefore choosing between two depends upon your specific needs and requirements. If you want to read the entire content at a time then you should use the read() method however if you need only to read a single line then you can utilize the function known as readline().



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