List and set validation in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the correct Pydantic type for a list of strings.

FastAPI

from pydantic import BaseModel, [1]

class Item(BaseModel):
    tags: [1][str]

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

AList

BTuple

CDict

DSet

Attempts:

3 left

💡 Hint

Common Mistakes

Using Set instead of List when order matters.

Forgetting to import the type from Pydantic.

The List type from Pydantic is used to validate lists of items, such as strings.

2fill in blank

medium

Complete the code to import the correct Pydantic type for a set of integers.

FastAPI

from pydantic import BaseModel, [1]

class Numbers(BaseModel):
    unique_ids: [1][int]

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

ASet

BList

CDict

DTuple

Attempts:

3 left

💡 Hint

Common Mistakes

Using List when uniqueness is required.

Confusing Set with Dict.

The Set type from Pydantic is used to validate sets, which are unordered collections of unique items.

3fill in blank

hard

Fix the error in the code to correctly validate a list of strings using Pydantic.

FastAPI

from pydantic import BaseModel, [1]

class User(BaseModel):
    hobbies: [1][str]

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

ASet

BDict

CList

DTuple

Attempts:

3 left

💡 Hint

Common Mistakes

Using Set which does not preserve order.

Using Dict which expects key-value pairs.

To validate a list of strings, use List[str] from Pydantic.

4fill in blank

hard

Fill both blanks to define a Pydantic model with a list of strings and a set of integers.

FastAPI

from pydantic import BaseModel, [1], [2]

class Data(BaseModel):
    names: [1][str]
    ids: [2][int]

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

AList

BSet

CDict

DTuple

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up List and Set types.

Forgetting to import both types.

List is used for ordered collections, and Set for unique unordered collections.

5fill in blank

hard

Fill all three blanks to create a Pydantic model with a list of strings, a set of integers, and a tuple of floats.

FastAPI

from pydantic import BaseModel, [1], [2], [3]

class Metrics(BaseModel):
    labels: [1][str]
    unique_codes: [2][int]
    scores: [3][float]

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

AList

BSet

CTuple

DDict

Attempts:

3 left

💡 Hint

Common Mistakes

Using Dict instead of Tuple for fixed-length sequences.

Not importing all required types.

Use List for ordered lists, Set for unique unordered sets, and Tuple for fixed-length ordered collections.