What Is Python? Explained for Beginners

Python is a general-purpose programming language known for code that is easy to read and quick to write. It was created by Guido van Rossum and first released in 1991, and it is now one of the most widely used languages in the world, especially in data science, automation and artificial intelligence.

Here is a complete Python program that reads a JSON file and prints the names inside it:

import json

with open("users.json") as file:
    users = json.load(file)

for user in users:
    print(user["name"])

There are no semicolons, no braces and no type declarations. Blocks are defined by indentation, which forces code to look consistent.

What Python is used for

• Data analysis and science. Libraries such as pandas, NumPy and Matplotlib make Python the standard language for working with data, from spreadsheets to scientific research.
• Machine learning and AI. TensorFlow, PyTorch and scikit-learn are all driven from Python. Most AI research code is written in it.
• Web back ends. Django, Flask and FastAPI serve websites and APIs.
• Automation and scripting. Renaming thousands of files, scraping a website, generating reports, gluing services together: Python is often the quickest tool.
• Education. Its readability makes it the usual first language in schools and universities.

Key ideas

Dynamic typing. Variables do not declare a type; count = 3 and later count = "three" are both allowed. This makes prototyping fast and occasionally hides bugs, which is why larger projects add optional type hints (def total(items: list[int]) -> int).

Batteries included. The standard library ships with modules for JSON, dates, HTTP, file handling, regular expressions, testing and much more, so small programs need no third-party packages.

Packages. Anything beyond the standard library is installed with pip from the Python Package Index (PyPI), which hosts hundreds of thousands of packages.

Interpreted. You run Python source files directly (python script.py); there is no separate compile step, which speeds up experimenting.

Python vs JavaScript

Both are dynamic, beginner-friendly languages. JavaScript runs in every web browser and is unavoidable for front-end work; Python does not run in browsers but dominates data and AI. Many developers learn both: Python for analysis and back ends, JavaScript for interfaces.

Getting started

1. Install Python 3 from python.org (macOS and most Linux distributions include it already).
2. Run python3 in a terminal to open the interactive prompt and type print("hello").
3. Save a file as hello.py and run it with python3 hello.py.
4. Read the official tutorial at docs.python.org; it is short and well written.

When your scripts start producing data, VoltKit's JSON formatter and JSON to CSV converter are handy for inspecting the output.