Cursor rule

1---
2description: "Python patterns extending common rules"
3globs: ["**/*.py", "**/*.pyi"]
4alwaysApply: false
5---
6# Python Patterns
7 
8> This file extends the common patterns rule with Python specific content.
9 
10## Protocol (Duck Typing)
11 
12```python
13from typing import Protocol
14 
15class Repository(Protocol):
16    def find_by_id(self, id: str) -> dict | None: ...
17    def save(self, entity: dict) -> dict: ...
18```
19 
20## Dataclasses as DTOs
21 
22```python
23from dataclasses import dataclass
24 
25@dataclass
26class CreateUserRequest:
27    name: str
28    email: str
29    age: int | None = None
30```
31 
32## Context Managers & Generators
33 
34- Use context managers (`with` statement) for resource management
35- Use generators for lazy evaluation and memory-efficient iteration
36 
37## Reference
38 
39See skill: `python-patterns` for comprehensive patterns including decorators, concurrency, and package organization.
40