Python Program to Find All File with .txt Extension Present Inside a Directory

In this example, you will learn to find all files with .txt extension present inside a directory.

To understand this example, you should have the knowledge of the following Python programming topics:

• Python File I/O
• Python Directory and Files Management
• Python for Loop

1. Example 1: Using glob

import glob, os

os.chdir("my_dir")

for file in glob.glob("*.txt"):
    print(file)

Output

c.txt
b.txt
a.txt

Using glob module, you can search for files with certain extensions.

• os.chdir("my_dir") sets the current working directory to /my_dir.
• Using a for loop, you can search for files with .txt extension using glob().
• * denotes all files with a given extension.

2. Example 2: Using os

import os

for file in os.listdir("my_dir"):
    if file.endswith(".txt"):
        print(file)

Output

a.txt
b.txt
c.txt

In this example, we use endswith() method to check the .txt extension.

• Using a for loop, iterate through each file of directory /my_dir.
• Check if the file has extension .txt using endswith().

3. Using os.walk

import os

for root, dirs, files in os.walk("my_dir"):
    for file in files:
        if file.endswith(".txt"):
            print(file)

Output

c.txt
b.txt
a.txt

This example uses the walk() method of the os module.

• Using a for loop, iterate through each files of my_dir.
• Check if the file has extension .txt using endswith().