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25 nooby Python habits you need to ditch

Python dataclasses will save you HOURS, also featuring attrs

Every PROOF you've seen that .999... = 1 is WRONG

Intro

The Single Most Useful Decorator in Python

Python's creator wishes this feature never existed

The Fastest Way to Loop in Python - An Unfortunate Truth

Python's sharpest corner is ... plus equals? (+=)

any use of reinterpret cast

casting away const

not using structured bindings

You should put this in all your Python scripts

str/int: Controversial breaking change added to Python

Restrict explanation

Zero inverse

Localization

31 nooby C++ habits you need to ditch

Type params

You should put this in all your Python scripts | if __name__ == '__main__': ...

Efficient Exponentiation

Faster CPython

Immortal objects

Better error locations

basicConfig

For loops are redundant

modifying a container while looping over it

forgetting to mark destructor virtual

Actually, you CAN divide by zero.

super, Python's most misunderstood feature.

returning std move of a local

not knowing about default vs value initialization

Comprehension inlining

Vector add example

Variable Lookup Weirdness in Python

4 Only providing io functions taking a path

Unlocking your CPU cores in Python (multiprocessing)

Exception Groups

not using unique ptr and shared ptr

thinking std move moves something

thinking raw pointers are bad

thinking evaluation order is left to right

Bye bye setuptools

Python Generators

__new__ vs __init__ in Python

Python lists remember what you did to them

logging is the standard

First Missing Int, faster than 100%! (C++ remake)

any manual resource management

TypedDict annotating kwargs

typing override decorator

Buffer protocol in Python

Correctness fib example

The real purpose of Python's match statement, feat. CSTs

Python's staticmethod and classmethod, what are they for?

Bit Arrays

Bloom filter implementation

Why bloom filters?

How does it work?

Where to get k hashes?

Bloom filter interface

Analyzing the False Positve Rate

Running the example code

11 Not knowing about properties

14 Any use of filter or map

mixing up const ptr vs ptr to const

Asyncio Task Groups

Every Python dev falls for this (name mangling)

Diagnose slow Python code. (Feat. async/await)

1 + 0.2 is NOT 0.3 in Most Programming Languages

Sudoku Solver in 7 minutes using Recursive Backtracking

the complete logging picture

dictConfig

Python 3.12 is HERE!

Example setup

Matching the CST

Library logging?

Log off the main thread with QueueHandler

logging4p

Why the lambda in a loop is bad

Why I prefer attrs over dataclasses

18 Thinking super means parent

Switch case?

Literal Strings

Unlocking your CPU cores in Python (feat. multiprocessing)

Positional-only and keyword-only arguments in Python

Which Python @dataclass is best? Feat. Pydantic, NamedTuple, attrs...

Time to Hack - Cracking passwords using only timing information

The Hottest New Feature Coming In Python 3.10 - Structural Pattern Matching / Match Statement

Modern Python logging

sum(range(n)) != n(n+1)/2

Custom filter

JSON logs

What is a code smell?

It's time... for PYTHON 3.11!

0.1 + 0.2 is NOT 0.3 in Most Programming Languages

The symptoms

A glaring flaw

Coding

Bloom Filters

Addressing complexity

ASTs and CSTs

Async for loops in Python

Why Zero times Anything is Zero

Exceptions to the rule

Exceptions to the rule

str vs bytes in Python

The trick

Does Python have a ternary operator?

Dataclass transforms

Traversing a tree

Decoupling

A forbidden Python technique to put ANYTHING in a dict or set.

Better defaults

21 MORE nooby Python habits

Independent versioning

Features

More complex example with max depth

Mind-bending metaclasses - adding function overloads to Python

How to use Python features from future versions!

Python staticmethod and classmethod

Python's most DISLIKED __dunder__ (and what to use instead)

Method Chaining Classes in Python

Mathematically Perfect Tongue Twisters

Binary Search - A Different Perspective

Python 3.12 is HERE

Should you use "not not x" instead of "bool(x)" in Python?

It's time... for PYTHON 3.11

Why I don't like Python's chained comparisons

Your code could be 2x faster! Gains from cache locality and branch predictability (C++)

Multiple Assignments in Python

Binary Search - A Different Perspective | Python Algorithms

restrict: the only C keyword with no C++ equivalent

using namespace std

C++17 mandatory copy elision

Pyimgui's core

When can copies be elided?

Watch out for this (async) generator cleanup pitfall in Python

You can pip install directly from GitHub

Where do the copies come from?

Return Value Optimization

Restrict in C

Why

The ONLY C keyword with no C++ equivalent

Result

Iterators and Range

Best practices, memcpy and memmove

File processing

Visiting the CST

Defining generators

True, True, True

Wait, it's real?

Generator pipelines

Generator comprehensions

Lazy sequences and Collatz

The import system

Prevent this before it ever happens

Lazy sequences and Collatz

Intro to chained comparisons

The import system

Prevent this before it ever happens

Python's comma equals ,= operator?

Fast pow

C++ Sudoku Solver in 7 minutes using Recursive Backtracking

Getting around the recursion limit

Exception Notes

Typing features

Why does Python even allow this? Chained comparison jank.

Should you use "not not x" instead of "bool(x)" in Python? (NO!)

Python Weirdness - The comma equals ,= operator?

How To Install Python for Data Science

Find why your Python code is slow using this essential tool. (Feat. async/await)

Benefits of salting, peppering, and hashing passwords | Secure Python

any use of new and delete

Return Value Optimization and Copy Elision in C++

Binary Search

Multiple assignment example

Two arg iter

Python's secret second argument to iter()

Writing zip, but for dictionaries

Async for syntax and purpose

Algorithm

The cleanup question

Async iterator protocols

Run an AI Large Language Model (LLM) at home on your GPU

Prerequisites

Tricky example

Async generators

Debugging in PyCharm

Running an model

Main purpose, subclassing immutable types

The async case

Abstract base classes

Simplest possible metaclass

super/MRO, Python's most misunderstood feature.

What is a metaclass

Singleton example

Async web app

All 71 built-in Python functions

New vs init

Function overloads

Client caching example

Let's fork and clone

Sorting

Metaclasses in Python

Motivating example

Avoiding import loops in Python

Encrypted file example

Load time metaclass

The meta path

Thanks

Don't make this big O mistake!

Running an model

thinking class members init in order of init list

Main purpose, subclassing immutable types

The async case

Abstract base classes

Simplest possible metaclass

Arithmetic operations

super/MRO, Python's most misunderstood feature.

What is a metaclass

The downside

Singleton example

5 __dict__

Async web app

type(obj) vs. obj.__class__ in Python, and changing an object's class.

attrs

Single arg iter

How to use type(obj)

All 71 built-in Python functions

not using constexpr

Reassign

Sponsoring myself!

New vs init

2 properties

Function overloads

Bad use cases

Client caching example

Speed comparison

Sponsored message

dict

Resurrecting

Let's fork and clone

Sorting

Metaclasses in Python

Motivating example

Bad List

Conclusion

Structuring your project

Avoiding import loops in Python

Encrypted file example

Load time metaclass

Salting, peppering, and hashing passwords

Python's permutations function (deep dive & implementation)

Coroutines

Good use cases

How to flatten a list | Basic Python Recipes

What are Python __future__ imports?

Static reflection

Python bool len rule

Find the Skyline Problem with C++ Solution Explained