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Python Tutorial

Beginner to Advanced5 min read1 runnable examples

Learn Python from your first print() to files, classes, NumPy and Pandas. Every lesson has examples you can edit and run in your browser, a short quiz, and a set of practice programs with fully explained solutions.

In this lesson
  • 47 lessons in a sensible order
  • Runnable examples in every lesson
  • Quizzes and exercises to check yourself
  • 900+ practice programs with solutions

Run your first Python program

Press Try it, change the name, then press Run. The code runs with real Python inside your browser, so there is nothing to install yet.

Python
name = "SQA Tools"print("Hello,", name)print("2 + 3 =", 2 + 3)
Output
Hello, SQA Tools
2 + 3 = 5

How this tutorial works

  • Read the lesson. Each topic starts with the idea in plain words, then shows small examples with their real output.
  • Edit and run the examples. Every Python example has a Try it button. Change the code and run it to see what happens.
  • Check yourself. Each lesson ends with a quiz and an exercise with hints and a solution.
  • Practise. The Program Practice section links to programs for that topic. Every solution explains the approach, walks through the code line by line and shows the real output.
Tip

New to programming? Go in order. Each lesson only uses what earlier lessons taught. If you already know another language, skim Getting Started and Basics, then jump to the topic you need.

Python tutorial syllabus

Getting Started

Lesson 2Python IntroductionLesson 3Install PythonLesson 4PyCharm & VS Code SetupLesson 5Python SyntaxLesson 6Output & CommentsLesson 7User Input

Basics

Lesson 8VariablesLesson 9Data TypesLesson 10Numbers & MathLesson 11Type CastingLesson 12Operators & Booleans

Control Flow

Lesson 13If…ElseLesson 14Match CaseLesson 15Loops: for & while

Strings

Lesson 16Strings & MethodsLesson 17String Formatting & f-strings

Data Structures

Lesson 18ListsLesson 19List ComprehensionLesson 20TuplesLesson 21List vs TupleLesson 22SetsLesson 23Dictionaries

Functions

Lesson 24FunctionsLesson 25LambdaLesson 26ScopeLesson 27RecursionLesson 28IteratorsLesson 29GeneratorsLesson 30Decorators

Object-Oriented Python

Lesson 31Classes & ObjectsLesson 32InheritanceLesson 33Polymorphism & Encapsulation

Errors

Lesson 34Exception Handling

Modules

Lesson 35Modules & pipLesson 36DatetimeLesson 37CollectionsLesson 38OS ModuleLesson 39sys ModuleLesson 40RegEx

File Handling

Lesson 41File HandlingLesson 42Read/Write JSONLesson 43Read/Write CSVLesson 44Read/Write Excel

Libraries & Databases

Lesson 45NumPyLesson 46PandasLesson 47SQLite

Python practice programs

Practice sets are grouped by topic. Pick one that matches the lesson you just finished.

40 programsPython Basic Programs64 programsPython If-Else Programs90 programsPython Loop Programs106 programsPython String Programs100 programsPython List Programs70 programsPython Tuple Programs94 programsPython Dictionary Programs48 programsPython Set Programs39 programsPython Function Programs38 programsPython File Handling Programs49 programsPython OS Module Programs48 programsPython OOP Programs100 programsPython NumPy Programs95 programsPython Pandas Programs20 programsPython Exception Handling Programs20 programsPython Iterator & Generator Programs20 programsPython Datetime Programs20 programsPython Collections Programs20 programsPython sys Module Programs20 programsPython RegEx Programs20 programsPython SQLite Programs

Why learn Python?

  • Readable. Python code reads almost like English, so you spend your time on the problem, not on punctuation.
  • Everywhere. Python is used for test automation, web back ends, data analysis, machine learning, scripting and DevOps tooling.
  • Huge library. The standard library covers files, dates, JSON, CSV, regular expressions and more, and PyPI adds hundreds of thousands of packages.
  • Great for testers. Selenium, Playwright, pytest and requests make Python a first choice for automation. When you finish here, continue with the Playwright with Python tutorial.

Python tutorial FAQ

Is this Python tutorial free?

Yes. All 47 lessons, quizzes and practice programs on sqatools.in are free to read and run.

Do I need to install Python to follow along?

Not at first. The Try it button runs examples in your browser. Install Python when you reach Install Python so you can write your own scripts.

How long does it take to learn Python?

Most beginners can finish the Getting Started, Basics, Control Flow and Data Structures lessons in two to three weeks at an hour a day. Practising programs after each lesson is what makes it stick.

Which Python version does this tutorial use?

The examples are written for Python 3 and were run with a current Python 3 release. The in-browser Try it runs Python 3.12, so a few newer features may behave differently there.

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