Comprehensions

squares = [x ** 2 for x in range(10)]
evens = [x for x in range(20) if x % 2 == 0]

Dataclass

from dataclasses import dataclass, field

@dataclass
class Article:
    title: str
    tags: list[str] = field(default_factory=list)

Handy Built-ins

Function Purpose
zip() Iterate multiple sequences
enumerate() Iterate with index
sorted() Return sorted values