Python Typing Patterns
Modern type hints for safe, documented Python code.
Basic Annotations
# Variables
name: str = "Alice"
count: int = 42
items: list[str] = ["a", "b"]
mapping: dict[str, int] = {"key": 1}
# Function signatures
def greet(name: str, times: int = 1) -> str:
return f"Hello, {name}!" * times
# None handling
def find(id: int) -> str | None:
return db.get(id) # May return NoneCollections
from collections.abc import Sequence, Mapping,
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