Why query parameters filter data in FastAPI - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a query parameter in FastAPI.

FastAPI

from fastapi import FastAPI
app = FastAPI()

@app.get("/items/")
async def read_items(q: [1] = None):
    return {"query": q}

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

Alist

Bint

Cstr

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using an integer type for a text query parameter.

The query parameter q is defined as a string type to accept text filters.

2fill in blank

medium

Complete the code to filter items by a query parameter.

FastAPI

items = ["apple", "banana", "cherry"]

@app.get("/items/")
async def read_items(q: str = None):
    if q:
        return [item for item in items if [1] in item]
    return items

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

Aq

Bitems

Citem

Dread_items

Attempts:

3 left

💡 Hint

Common Mistakes

Using the list name instead of the query parameter for filtering.

The code checks if the query string q is part of each item to filter the list.

3fill in blank

hard

Fix the error in the query parameter default value to make it optional.

FastAPI

@app.get("/users/")
async def read_users(name: [1]):
    return {"name": name}

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

Astr = None

Bstr = ''

Cint = None

Dbool = False

Attempts:

3 left

💡 Hint

Common Mistakes

Using empty string as default makes parameter required with empty value.

Setting the default to None makes the query parameter optional.

4fill in blank

hard

Fill both blanks to filter items by minimum and maximum price query parameters.

FastAPI

items = [{"name": "apple", "price": 5}, {"name": "banana", "price": 3}, {"name": "cherry", "price": 7}]

@app.get("/items/")
async def read_items(min_price: int = None, max_price: int = None):
    filtered = [item for item in items if (min_price is None or item[[1]] >= min_price) and (max_price is None or item[[2]] <= max_price)]
    return filtered

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

A"price"

B"name"

C"cost"

D"value"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys like "name" or "cost" which do not exist.

Both blanks should access the "price" key to filter by price range.

5fill in blank

hard

Fill all three blanks to create a filtered dictionary of items with names and prices above a threshold.

FastAPI

items = [{"name": "apple", "price": 5}, {"name": "banana", "price": 3}, {"name": "cherry", "price": 7}]

@app.get("/items/")
async def read_items(min_price: int = 4):
    result = {item[[1]]: item[[2]] for item in items if item[[3]] > min_price}
    return result

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

A"name"

B"price"

D"cost"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys like "cost" or mixing keys incorrectly.

The dictionary keys are item names and values are prices filtered by price greater than min_price.