How to Find All .txt Files in a Directory (and Subdirectories) in Python?

Finding Files with .txt Extension in Python

Finding files with a specific extension in a directory is a common task in programming. In Python, there are several approaches to accomplish this, particularly when searching for files with the .txt extension.

Using Glob

The glob module provides a convenient way to search for files matching a certain pattern. To find all files with the .txt extension, use the following code:

import glob, os
os.chdir("/mydir")
for file in glob.glob("*.txt"):
    print(file)

Using os.listdir

Alternatively, you can use the os.listdir function to list the contents of a directory. To filter out only the .txt files, use the following code:

import os
for file in os.listdir("/mydir"):
    if file.endswith(".txt"):
        print(os.path.join("/mydir", file))

Using os.walk

If you need to traverse through nested directories, the os.walk function provides a powerful way. The following code will recursively search all subdirectories for .txt files:

import os
for root, dirs, files in os.walk("/mydir"):
    for file in files:
        if file.endswith(".txt"):
             print(os.path.join(root, file))

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