Python
Python is easy to start and surprisingly deep to finish. These articles cover the everyday syntax, the standard-library tools that save real time, and the errors that stop beginners cold — each one explained by what Python is actually doing, not just what to type.
Core syntax
- Python JSON: load vs loads, and the Traps Between json.dumps on a datetime raises TypeError, and the default settings turn Hindi text into a wall of backslash-u escapes. Four functions, a handful of arguments, and a surprising number of ways to lose data. Tutorial · 10 min read · August 6, 2026
- Python Sets: Fast Lookups and the Order You Lose Checking if x in my_list inside a loop is the quiet way to turn a fast script into a slow one. Sets fix that in one line, and take away order and duplicates in exchange. Tutorial · 10 min read · August 6, 2026
- Python File Handling: Reading and Writing Files Safely Opening a file with the wrong mode deletes its contents before you write a single byte. That happens before any error you could catch. Tutorial · 10 min read · August 5, 2026
- Python enumerate and zip: Loop Like a Python Developer If your loop contains range(len(...)), Python has a better tool. These two functions replace most index juggling entirely. Tutorial · 8 min read · August 5, 2026
- Python Decorators Explained: Wrap Functions Like a Pro A beginner-friendly guide to Python decorators: functions as objects, closures, the @ syntax, functools.wraps, and decorators that take arguments. Tutorial · 9 min read · July 22, 2026
- Python *args and **kwargs: A Beginner-Friendly Guide A beginner-friendly guide to *args and **kwargs in Python: how each one collects arguments, how to unpack them, and how to order parameters correctly. Tutorial · 8 min read · July 22, 2026
- Python List vs Tuple: Differences and When to Use Each Lists change, tuples don't. See how Python lists and tuples differ in mutability, speed, memory, and hashability, plus exactly when to reach for each. Comparison · 8 min read · July 22, 2026
- How to Define and Use Functions in Python A beginner-friendly guide to writing Python functions — def, parameters, return values, defaults, keyword arguments, and a gentle look at *args and **kwargs. Tutorial · 9 min read · July 22, 2026
- Python String Methods Cheat Sheet (with Examples) A scannable cheat sheet of the Python string methods you use most, each with a tiny working example, plus f-strings for formatting. Tips & Tricks · 8 min read · July 22, 2026
Standard library and tooling
- Unit Testing for Beginners: What to Actually Test A test that asserts a private helper was called will go red when you rename it and stay green when the feature breaks. Here is how to write tests that fail only when something is actually wrong. Tutorial · 9 min read · August 6, 2026
- Python datetime: Timezones, Formats and Naive Bugs datetime.now() gives you a timestamp with no timezone attached. Deploy that code on a UTC server and every time your Pune users see shifts by five and a half hours, with no error anywhere. Tutorial · 10 min read · August 6, 2026
- Python itertools: combinations, groupby and the Lazy Trap itertools.groupby does not group your data. It groups runs of consecutive equal keys, so unsorted input gives you the same key back three times and nobody warns you. Tutorial · 11 min read · August 6, 2026
- Python Type Hints: What They Do and What They Do Not You can annotate a parameter as int and pass it a string. Python will run the function happily. Type hints are documentation that a separate tool can check, and nothing more. Tutorial · 11 min read · August 6, 2026
- Python Logging: Why print() Is Not Enough logging.info() prints nothing on a fresh interpreter and never tells you why. The root logger defaults to WARNING, so your first three log lines vanish and you conclude logging is broken. Tutorial · 11 min read · August 6, 2026
- pytest for Beginners: Fixtures, Parametrize and CI pytest exits with a green-looking message when it finds no tests at all. If your file is not named test_something.py, your entire suite is invisible and you will not be told why. Tutorial · 12 min read · August 6, 2026
- Python ModuleNotFoundError: No Module Named — How to Fix You installed the package. Python still cannot find it. Almost always, pip and python are pointing at two different interpreters. Tutorial · 9 min read · August 6, 2026
- Python Virtual Environments: venv and pip Explained The step most tutorials skip, and the reason the same code runs on your machine and fails on someone else's. Tutorial · 9 min read · August 5, 2026
Going deeper
- Python async/await and asyncio, Explained Properly One time.sleep() call inside an async function freezes every other task in your program. Here is what await actually does, and why async speeds up network calls but not number crunching. Tutorial · 10 min read · August 6, 2026
- Python Dunder Methods: Make Your Class Feel Built-In You define __str__, print the object and it looks fine. Put the same objects in a list, print that, and you are back to angle brackets and memory addresses. Here is why, and what else dunder methods control. Tutorial · 10 min read · August 6, 2026
- Python Generators and the yield Keyword, Made Simple A beginner-friendly guide to Python generators: how yield makes functions lazy, how they save memory, and when to use them instead of lists. Tutorial · 9 min read · July 22, 2026
Fixing Python errors
- Python KeyError, IndexError and AttributeError Explained Three errors, one root cause: you asked for something that is not there. The harder question is whether the missing thing is the bug, or only the symptom of one. Tutorial · 11 min read · August 6, 2026
- Python TypeError: Five Patterns and Their Real Causes Most TypeErrors are not about types at all. They are about a variable holding something you never intended to put there, one or two lines earlier. Tutorial · 11 min read · August 6, 2026
- Python IndentationError: Why It Happens and How to Fix It Python uses whitespace as syntax, so indentation is not style — it is structure. Most of these errors come from one invisible character. Tutorial · 8 min read · August 6, 2026
- Python Try Except: Handling Errors the Right Way A beginner-friendly guide to handling errors in Python using try, except, else and finally, plus catching specific exceptions and raising your own. Tutorial · 9 min read · July 22, 2026
More on Python
- Python collections: Counter, defaultdict, deque, namedtuple defaultdict is the most useful class in the module and the easiest one to get wrong. Simply reading a missing key adds it, so a lookup can silently grow your dictionary. Tutorial · 11 min read · August 6, 2026
- Python Cheat Sheet for Beginners The syntax you actually reach for, in one place — including the idioms that separate Python written by a Python developer from Python written in another language's accent. Tips & Tricks · 11 min read · August 6, 2026
- 12 Python Projects for Beginners (With What Each Teaches) Tutorial projects all look the same to a recruiter. What makes a project count is the part you added after the tutorial ended. Tips & Tricks · 12 min read · August 6, 2026
- Python Interview Questions for Freshers (With Answers) Interviewers probe the same handful of Python topics. Knowing why mutable defaults break is worth more than listing twenty built-in functions. Career · 12 min read · August 6, 2026
- OOP Interview Questions and Answers (Java, Python, C++) Every placement asks about the four pillars. The answers that stand out give a reason for each concept rather than a textbook definition. Career · 12 min read · August 6, 2026
- Python Dictionary Methods: A Beginner's Guide with Examples A beginner-friendly tour of the most-used Python dictionary methods, each with a runnable snippet, plus a word-frequency example and common mistakes. Tutorial · 9 min read · July 22, 2026
- Python Classes and Objects: OOP for Beginners A beginner-friendly intro to OOP in Python: classes, objects, __init__, self, methods, and a first look at inheritance, all with working code. Tutorial · 9 min read · July 22, 2026
- Python for Loop Explained with Examples A beginner guide to the Python for loop: range(), lists, strings, dictionaries, enumerate(), nested loops, break, continue and the else clause. Tutorial · 9 min read · July 22, 2026
- How to Reverse a String in Python (5 Easy Ways) Five beginner-friendly ways to reverse a string in Python — slicing, reversed() + join(), for loop, while loop, and recursion — with runnable code and a clear pick. Tutorial · 9 min read · July 22, 2026
- Python List Comprehension Explained with Examples A beginner-friendly guide to Python list comprehension — syntax, filtering, if-else, nested loops, and when a plain for loop is the better choice. Tutorial · 8 min read · July 22, 2026
- Java vs Python: Which Should You Learn First in 2026? An honest, beginner-friendly comparison of Java and Python — syntax, speed, jobs in India, and which one to learn first in 2026. Comparison · 9 min read · July 22, 2026
- DSA Roadmap for Beginners: How to Start in 2026 A step-by-step DSA roadmap for absolute beginners: the right topic order, how much time each stage takes, and the mistakes that waste months. Career · 9 min read · July 22, 2026
- Python vs JavaScript: Which Should You Learn First? An honest comparison on syntax, jobs, learning curve and where each one actually runs — plus which to pick depending on what you want to build. Comparison · 8 min read · May 7, 2026
- Python vs JavaScript: Which Should You Learn First? A detailed comparison of two of the most popular programming languages. We break down use cases, job market, and learning curve. Comparison · 8 min read · May 7, 2026