Default values in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a default value for the query parameter.

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'

ANone

B"default"

C0

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to use quotes for string default values.

Using None without typing Optional[str].

The default value for the query parameter q is set by assigning it in the function signature. Here, "default" is the default string value.

2fill in blank

medium

Complete the code to set a default integer value for the path parameter.

FastAPI

from fastapi import FastAPI

app = FastAPI()

@app.get("/users/{user_id}")
async def read_user(user_id: int = [1]):
    return {"user_id": user_id}

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

ANone

B"1"

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using string values for integer parameters.

Setting None as default for non-optional parameters.

The default value for the path parameter user_id must be an integer. Here, 1 is the correct default integer value without quotes.

3fill in blank

hard

Fix the error in setting a default value for an optional query parameter.

FastAPI

from typing import Optional
from fastapi import FastAPI

app = FastAPI()

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

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

ATrue

B""

C0

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Using empty string instead of None for optional parameters.

Not importing Optional from typing.

When using Optional[str], the default value should be None to indicate the parameter is optional and may be omitted.

4fill in blank

hard

Fill both blanks to set a default value and type for a query parameter.

FastAPI

from fastapi import FastAPI

app = FastAPI()

@app.get("/products/")
async def get_products(limit: [1] = [2]):
    return {"limit": limit}

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

Aint

B10

Cstr

D"10"

Attempts:

3 left

💡 Hint

Common Mistakes

Using string default value for an integer type.

Swapping type and default value positions.

The query parameter limit is typed as int and has a default value of 10 (an integer).

5fill in blank

hard

Fill all three blanks to create a default value for a query parameter with a description.

FastAPI

from fastapi import FastAPI, Query

app = FastAPI()

@app.get("/items/")
async def read_items(q: str = Query([1], description=[2], min_length=[3])):
    return {"q": q}

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

A"default"

B"Search query string"

C3

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Putting None as default when a string default is expected.

Using quotes incorrectly around integers.

The query parameter q uses Query to set a default value "default", a description, and a minimum length of 3 characters.