In this article we will show you the solution of python read file line by line, with Python, there are numerous ways to read every line in a file. They consist of context managers, readlines, and readlines.

After opening the files, you can read every word inside and carry out various actions.

The file function readline() in Python allows you to read one entire line from the specified file.

The complete line would be returned by default, and the size parameter becomes optional.

Now move to the concept of python read file line by line.

Step By Step Guide On Python Read File Line By Line :-

Method - Using readlines() method in python

myfile = open("test.txt", "r")
mylist = myfile.readlines()
print(mylist)
myfile.close()

1. Open the file with file open() method in the initial line of code.
2. You can read a line from the file by using the readlines() function.
3. Use the readlines() function to read every line at once and return it as a list element with each line represented as a string.
4. After that, read the line that was read from the file using the print function.
5. After reading is complete, can use close() method to shut down the file.

Method - Utilising a for loop for read the file line by line

minefile = open("test.txt", "r")
for line in minefile:
    print(line)
minefile.close()

1. The first line of code uses the Python open() function to open the file in read-only mode.
2. Then, a file handler will be returned by the open() function.
3. Then, read every line from the supplied file, line by line, using the file handler built into your for-loop.
4. Once the file has reached its finish, the loop ends.
5. By doing this, we are utilising the built-in Python method that enables us to combine the use of the iterable object with an implicit for loop iteration over the file object.
6. The lines are then read one by one using the print method.
7. Once finished, use the close() function to shut down the file handler.

Method - Using size argument in readline()

myfile = open("demo.txt", "r")
myline = myfile.readline(10)
print(myline)
myfile.close()

1. In the first line of code, we use the Python open() function to open the file in read-only mode.
2. After that, we use the size argument to only acquire the line's necessary length.
3. The first line will then be retrieved, returning a line with characters ranging from 0 to 10.
4. After that, read the line that was read from the file using the print function.
5. After reading is complete, use the close() method to shut down the file.

Conclusion :-

We were capable of knowing that Python read files line after line as a result. Python has a variety of methods for reading a file's lines, as we've learned.

They are made up of readlines, context managers, and readlines. When you open the file, you can do a variety of operations and read every word therein.

You can read a single line in its entirety from the given file using Python's readline() method.

To get the appropriate line length, use the size option as well. By default, the entire line would be returned, and the size argument would no longer be required.

I hope this article on python read file line by line helps you and the steps and method mentioned above are easy to follow and implement.