Basic query parameter declaration in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a query parameter named 'q' in a FastAPI path operation.

FastAPI

from fastapi import FastAPI
app = FastAPI()

@app.get("/items/")
async def read_items(q: str = [1]):
    return {"q": q}

Drag options to blanks, or click blank then click option'

A"default"

BTrue

CNone

D...

Attempts:

3 left

💡 Hint

Common Mistakes

Using '...' without importing it

Setting default to True which is not a string or None

Forgetting to set a default value

Setting the default value to None makes the query parameter optional.

2fill in blank

medium

Complete the code to declare an integer query parameter named 'page' with default 1.

FastAPI

from fastapi import FastAPI
app = FastAPI()

@app.get("/users/")
async def list_users(page: [1] = 1):
    return {"page": page}

Drag options to blanks, or click blank then click option'

Aint

Bstr

Cfloat

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using string type for numeric parameters

Forgetting to set a default value

Using float instead of int

Use int to declare an integer query parameter.

3fill in blank

hard

Fix the error in the code by completing the query parameter declaration for 'limit' as an optional integer.

FastAPI

from typing import Optional
from fastapi import FastAPI
app = FastAPI()

@app.get("/products/")
async def get_products(limit: [1] = None):
    return {"limit": limit}

Drag options to blanks, or click blank then click option'

Aint

BOptional[str]

Cstr

DOptional[int]

Attempts:

3 left

💡 Hint

Common Mistakes

Using just int without Optional when default is None

Using Optional[str] when expecting int

Not importing Optional

Use Optional[int] to declare an optional integer query parameter.

4fill in blank

hard

Fill both blanks to declare a query parameter 'search' as a string with default empty string and 'limit' as an integer with default 10.

FastAPI

from fastapi import FastAPI
app = FastAPI()

@app.get("/items/")
async def search_items(search: [1] = "", limit: [2] = 10):
    return {"search": search, "limit": limit}

Drag options to blanks, or click blank then click option'

Astr

Bint

Cfloat

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing types between parameters

Using float or bool incorrectly

Not matching default values to types

search is a string query parameter with default empty string, and limit is an integer with default 10.

5fill in blank

hard

Fill all three blanks to declare query parameters: 'q' as optional string with default None, 'page' as int default 1, and 'size' as int default 20.

FastAPI

from typing import Optional
from fastapi import FastAPI
app = FastAPI()

@app.get("/search/")
async def search(q: [1] = None, page: [2] = 1, size: [3] = 20):
    return {"q": q, "page": page, "size": size}

Drag options to blanks, or click blank then click option'

AOptional[str]

Bint

Cstr

DOptional[int]

Attempts:

3 left

💡 Hint

Common Mistakes

Using str instead of Optional[str] for optional parameters

Using Optional[int] unnecessarily for page and size

Mixing types between parameters

q is an optional string, page and size are integers with default values.