Python
Introduction to Python
Python is a high level, dynamically typed, interpreted language whose whole design goal is that a program should be as easy to read as it was to write...
Python
A complete core Python path: syntax, data types, operators, strings, control flow, collections, functions, exceptions, files, modules, the standard library, OOP, iterators, generators, decorators, internals, concurrency, regular expressions, testing, typing, performance, security, problem solving, projects, interview preparation and exams.
110 notes in 33 topics
Topics in Python
Basics 5
Data Types 4
Operators 5
Strings 5
Control Flow 5
Lists 3
Tuples 2
Sets 2
Dictionaries 3
Comprehensions 2
Functions 4
Advanced Functions 2
Recursion 2
Exception Handling 4
File Handling 4
Modules 3
Standard Library 6
OOP 5
Advanced OOP 5
Iterators and Generators 3
Decorators 2
Context Managers 1
Descriptors and Dataclasses 2
Python Internals 4
Concurrency 4
Regular Expressions 3
Serialization 2
Command Line Python 2
Testing and Debugging 3
Type Hints 2
Performance 3
Python Security 2
DSA with Python 6
Notes
Python
Installing Python and Running Your First Program
Install Python, check the version, meet the REPL, write a script and understand the difference between interactive mode and script mode.
Python
How Python Runs Your Code
Source code is compiled to bytecode and the Python Virtual Machine executes it. Knowing that explains __pycache__, import speed and most confusing err...
Python
Python Syntax and Structure
Indentation defines blocks, statements end at the line break, and a short set of rules about comments, keywords and identifiers covers everything else...
Python
Variables, Assignment and Constants in Python
A Python variable is a name bound to an object, not a box holding a value. That one distinction explains multiple assignment, swapping, dynamic typing...
Python
Python Data Types: The Complete Map
Python ships with a small set of built in types. Sorting them by three questions - single value or container, ordered or not, changeable or not - make...
Python
Numbers in Python: int, float, complex and bool
Integers are unbounded, floats are binary approximations, division always produces a float, and bool is quietly an integer. Each of those facts change...
Python
Mutability, Identity and Type Checking
type() names the class, id() names the object and isinstance() answers the question you usually meant to ask. Together they explain every aliasing sur...
Python
Type Conversion in Python
Python converts numeric types automatically inside an expression and refuses everything else. Explicit conversion is a set of constructor functions, e...
Python
Arithmetic, Assignment and Comparison Operators
The seven arithmetic operators, the augmented assignment family and the six comparisons, including the chained comparison form that other languages do...
Python
Logical, Membership and Identity Operators
and, or and not return one of their operands rather than a boolean. in tests membership. is tests identity. Each has a use where the others are wrong.
Python
Bitwise Operators in Python
Six operators that work on the individual bits of an integer. Rarely needed in everyday code, routinely needed for flags, masks, permissions and inter...