Python Program to Print Just the Last Line of a Text File

Files in Python:

One of the most important subjects for programmers and automation testers is Python file handling (also known as File I/O). It is necessary to work with files in order to write to or read data from them.

Also, if you didn’t know, I/O operations are the most expensive processes where a program can go wrong. As a result, you must use extreme caution while implementing file processing for reporting or any other reason. Optimizing a single file action can help in the creation of a high-performing application or a reliable automated software testing solution.

Consider the following scenario: you’re planning to construct a large Python project with a large number of workflows. Then it’s unavoidable that you don’t make a log file. You’ll also be handling the log file’s read and write activities. Debugging huge applications with log files is a terrific way to go. It’s usually better to consider a scalable design from the start, as you won’t be sorry later if you didn’t.

Given a file, the task is to print only the last line of the given File.

Program to Print Just the Last Line of a Text File in Python

Below is the full approach for printing just the last line of the given File

Approach:

Make a single variable to store the path of the file. This is a constant value. This value must be replaced with the file path from your own system in the example below.
Open the file in read-only mode. In this case, we’re simply reading the contents of the file.
Get the list of lines using the readlines() function and store it in the variable.
Print the last line of the given file using negative indexing.
The Exit of Program.

Below is the implementation:

# Make a single variable to store the path of the file. This is a constant value. 
# This value must be replaced with the file path from your own system in the example below.
givenFilename = "samplefile.txt"
# Open the file in read-only mode. In this case, we're simply reading the contents of the file.
with open(givenFilename, 'r') as givenfilecontent:
    # Get the list of lines using the readlines() function and store it in the a variable.
    list_of_lines = givenfilecontent.readlines()
    # Print the last line of the given file using negative indexing
    print("The last line of the given file is:")
    print(list_of_lines[-1])

Output:

The last line of the given file is:
welcome to btechgeeks

File Content:

GoodMorning 123 this is 567 Btechgeeks @#%
hello this is Btechgeeks
welcome to btechgeeks

Explanation:

The file path is stored in the variable ‘file name.’ Change the value of this variable to the path of your own file.
Dragging and dropping a file onto the terminal will show its path. The code will not run unless you change the value of this variable.
The file will be opened in reading mode. Use the open() function to open a file. The path to the file is the method’s first parameter, and the mode to open the file is the method’s second parameter.
When we open the file, we use the character ‘r’ to signify read-mode.
readlines() function returns all the lines of the file as a list.
We Print the last element of the list using negative indexing.

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Files and Code:

Program to Print Just the Last Line of a Text File in Python

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