How to Count Number of Lines in File with Python

Written by Rahul, Updated on September 16, 2019

This is a small Python script to count the number of lines in a text file. To run this script you must have Python installed on your system. Now save below script in a Python script (eg: count.py) and update test.txt with your filename in the script to which you need to count lines.

vim count.py

fname = "test.txt"
count = 0
with open(fname, 'r') as f:
    for line in f:
        count += 1
print("Total number of lines is:", count)

fname = "test.txt"

count = 0

with open(fname, 'r') as f:

for line in f:

count += 1

print("Total number of lines is:", count)

Then execute the script on the command line and see the result. This will show you the number of lines available in a file.

python3 count.py

Total number of lines is: 513

Rahul

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