Lesson 1 / 49
Python Introduction
Learn what Python is, where it is used in data science, web and automation, and how the interpreter runs your code.
What is Python?
Python is a high-level, interpreted language released by Guido van Rossum in 1991. It favours readability — you say more in fewer lines.
Where it's used
Data science & AI (NumPy, PyTorch), web backends (Django, FastAPI), automation and scripting, and teaching — it's often a first language.
Running Python
No compile step — the interpreter reads the file top to bottom.
# macOS / Linux
python3 script.py # run a file
python3 # interactive REPL
# Windows
py script.py
py # interactive REPL