Usage of common methods of os.path module

os_path_usage.py

import os
import glob

# Get current directory
dir_path = os.path.dirname(os.path.realpath(__file__))

# Walk match files by a pattern within directory 
glob.glob('your-directory/*')

# Recursively walk through all the files/directories within a folder
def list_directory_files(directory, ext='', full_path=True):
    for root, dirs, files in os.walk(directory):
        for filename in files:
            if filename.endswith(ext):
                file_path = os.path.join(root, filename) if full_path else filename
                yield file_path
                
# Rename file
if filename.startswith('bad_name_'):
    os.rename(filename, filename[9:])
    
# Get path for directory parent to the one the file is within
__CURRENT_DIR = os.path.dirname(os.path.realpath(__file__))
PROJECT_ROOT = os.path.abspath(os.path.join(__CURRENT_DIR, os.pardir))