fastapi-developmentlisted
Install: claude install-skill aiskillstore/marketplace
# FastAPI Development
## Quick start
Create a basic FastAPI application:
```python
from fastapi import FastAPI
app = FastAPI()
@app.get("/")
async def read_root():
return {"Hello": "World"}
@app.get("/items/{item_id}")
async def read_item(item_id: int, q: str | None = None):
return {"item_id": item_id, "q": q}
```
Run with:
```bash
uv run uvicorn main:app --reload
```
## Common patterns
### Pydantic models for validation
```python
from pydantic import BaseModel
from typing import Optional
class Item(BaseModel):
name: str
description: Optional[str] = None
price: float
tax: Optional[float] = None
@app.post("/items/")
async def create_item(item: Item):
return item
```
### Dependency injection
```python
from typing import Annotated
from fastapi import Depends
async def common_parameters(
q: str | None = None,
skip: int = 0,
limit: int = 100
):
return {"q": q, "skip": skip, "limit": limit}
CommonsDep = Annotated[dict, Depends(common_parameters)]
@app.get("/items/")
async def read_items(commons: CommonsDep):
return commons
```
### Database dependencies with cleanup
```python
async def get_db():
db = connect_to_database()
try:
yield db
finally:
db.close()
@app.get("/query/")
async def query_data(db: Annotated[dict, Depends(get_db)]):
return {"data": "query results"}
```
### Error handling
```python
from fastapi import HTTPException
@app.get("/items/{item_id}")
async def read_item(