Basic run

python my_script.py

python my_script.py

Use a virtual environment

• isolate dependencies
• avoid “works on my machine”

Working directory tip

Many scripts break because they assume the current directory.

Prefer pathlib.Path(__file__)pathlib.Path(__file__):

from pathlib import Path
 
BASE_DIR = Path(__file__).resolve().parent
print(BASE_DIR)

from pathlib import Path
 
BASE_DIR = Path(__file__).resolve().parent
print(BASE_DIR)

🧪 Try It Yourself

Exercise 1 – List Files with os.listdir

Exercise 2 – Join Paths with os.path.join

Exercise 3 – Write and Read a File