Run isort only for modified files

run_isort.py

import subprocess

result = subprocess.check_output(['git', 'status', '-s'])
result = result.decode('utf-8')

files = []
for line in result.split('\n'):
    line = line.strip()
    if line.startswith('M') or line.startswith('??') or line.startswith('A'):
        path = line.split()[1]
        files.append(path)
        print(f'Found changed file: {path}')

if not files:
    exit('Files not found!')

print('\nRunning isort\n')

for f in files:
    command = f'isort {f} -y -rc'
    subprocess.run(command.split())