Python programming language is a pinnacle in the IT industry. With brilliant library support and out of the box features, Python programming has made file handling looking like a piece of cake. It provides easy implementations for File handling related tasks. One such method is the Python readline method. In this article, we will learn about the Python readline() method with examples. The following concepts are covered in this article: Show
What is Python readline()?Python readline() method will return a line from the file when called.  readlines() method will return all the lines in a file in the format of a list where each element is a line in the file. Syntax And UsageAfter opening the file using the open() method, we can simply use these methods. Python readline() syntax file = open("filename.txt", "r") file.readline()The readline method takes one parameter i.e size, the default value for the size parameter is -1. It means that the method will return the whole line. It is an optional parameter, we can specify the number of bytes from a line to return. readlines() Syntax file = open("filename.txt","r") file.readlines()The readlines method takes one parameter i.e hint, the default value for the hint parameter is -1. It means that the method will return all the lines. If we specify the hint parameter, the lines exceeding the number of bytes from the hint parameter will not be returned by the readlines method. Let us go ahead and take a look at a few examples to understand how these methods work in Python. Python readline() ExamplesLet us suppose we have a text file with the name examples.txt with the following content. Python is the best programming language in the world in 2020 Now, to use the readline, we will have to open the example.txt file. file = open("example.txt", "r") example1 = file.readline() example2 = file.readline(14) print(example1) print(example2)Output: Python is the best programming language in the world in 2020 readlines() Examples We can use the readlines() method just like we used readline() in the above example. example1 = file.readlines() print(example1)Output: ['Python is the best programming language in the world in 2020', Output: ['Python is the best programming language in the world in 2020', This brings us to the end of this article where we have learned how we use the Python readline() method with examples. I hope you are clear with all that has been shared with you in this tutorial. If you found this article on “Python readline()” relevant, check out Edureka’s Python Course a trusted online learning company with a network of more than 250,000 satisfied learners spread across the globe. We are here to help you with every step on your journey and come up with a curriculum that is designed for students and professionals who want to be a Python developer. The course is designed to give you a head start into Python programming and train you for both core and advanced Python concepts along with various Python frameworks like Django. If you come across any questions, feel free to ask all your questions in the comments section of “Python readline()”. Our team will be glad to answer. Upcoming Batches For Python Certification Training Course
Which of the following commands can be used to read the entire contents of a file as a string?question. Answer: The correct option for the command to read the entire contents of a file as string using the object <file> is found to be option (d) file. readlines() .
Which method is used to read the entire contents of a file?The read() method returns the entire contents of the file as a single string (or just some characters if you provide a number as an input parameter.
Which method is used to read the entire contents of a file Python?Method 1: Read a File Line by Line using readlines()
readlines() is used to read all the lines at a single go and then return them as each line a string element in a list. This function can be used for small files, as it reads the whole file content to the memory, then split it into separate lines.
What does read () do in Python?The read() method returns the specified number of bytes from the file. Default is -1 which means the whole file.
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