darker

# First, ensure you have a Git repository initialized and a Python file with changes # Example setup: # mkdir my_project && cd my_project && git init # echo "print ( 'Hello, world' )" > my_file.py # git add my_file.py && git commit -m "Initial commit" # echo "def foo ( ):\n pass\nprint ( 'Another line' )" >> my_file.py # Format only the modified lines in 'my_file.py' # Requires black to be installed, e.g., pip install 'darker[black]' import subprocess import os def run_darker(command): try: result = subprocess.run(command, capture_output=True, text=True, check=True) print(result.stdout) if result.stderr: print(f"Stderr: {result.stderr}") except subprocess.CalledProcessError as e: print(f"Command failed with exit code {e.returncode}\nStdout: {e.stdout}\nStderr: {e.stderr}") # Assuming you are in a git repository with changes in my_file.py # This will reformat the added/modified lines in my_file.py # For this example to be runnable, ensure 'darker' and 'black' are installed and a Git repo exists. # To see an effect, modify my_file.py after an initial commit: # echo "def some_func ( ):\n x = 1" >> my_file.py # then run `python -m darker my_file.py` print("Running darker on 'my_file.py'...") # Use python -m darker to ensure it runs from the correct environment run_darker(['python', '-m', 'darker', 'my_file.py']) print("\nShowing the diff without applying changes (dry run):") run_darker(['python', '-m', 'darker', '--diff', 'my_file.py']) print("\nApplying darker with isort on 'my_file.py' (if isort installed):") run_darker(['python', '-m', 'darker', '--isort', 'my_file.py'])