A high-level, interpreted, dynamically typed language that favours readability — the most common language for interviews, scripting, data and AI.

Why Python?

How Python runs your code

Source
You write app.py — plain text.
Compile to bytecode
CPython parses it and compiles it to bytecode (cached as __pycache__/*.pyc).
Run on the PVM
The Python Virtual Machine executes the bytecode instruction by instruction — that is the “interpreted” part.

Implementation	What it is
CPython	The reference implementation, written in C. What you get from python.org. Has the GIL.
PyPy	JIT-compiled — often several times faster for long-running pure-Python code.
Jython / IronPython	Python on the JVM / .NET (rarely used today).

Your first program

Python

name = "Python"
version = 3
print(f"Hello, {name} {version}!")   # Hello, Python 3!
print(type(name), type(version))    # <class 'str'> <class 'int'>

Terminal

$ python3 --version          # check the installed version
$ python3 app.py             # run a file
$ python3                    # interactive REPL (exit with Ctrl-D)
$ python3 -m venv .venv      # create an isolated environment

Style: PEP 8 and the Zen

4 spaces per indent level, never tabs.
snake_case for variables and functions, PascalCase for classes, UPPER_CASE for constants.
Lines around 79–99 characters; one statement per line.
Run import this to read The Zen of Python — “Readability counts.”, “Explicit is better than implicit.”