Background tasks in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the BackgroundTasks class from FastAPI.

FastAPI

from fastapi import [1]

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ARequest

BBackgroundTasks

CDepends

DFastAPI

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the main FastAPI class instead of BackgroundTasks.

Importing unrelated classes like Request or Depends.

The BackgroundTasks class is imported from FastAPI to schedule background work.

2fill in blank

medium

Complete the function parameter to accept background tasks in a FastAPI endpoint.

FastAPI

from fastapi import BackgroundTasks

@app.post("/send")
async def send_email(background_tasks: [1]):
    pass

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ABackgroundTasks

BRequest

CDepends

DResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Using Request or Response instead of BackgroundTasks.

Forgetting to type the parameter as BackgroundTasks.

The endpoint function must accept a parameter of type BackgroundTasks to schedule background work.

3fill in blank

hard

Fix the error in scheduling a background task to call the function write_log with argument message.

FastAPI

def write_log(message: str):
    with open("log.txt", "a") as log:
        log.write(message + "\n")

@app.post("/log")
async def log_message(background_tasks: BackgroundTasks, message: str):
    background_tasks.[1](write_log, message)
    return {"message": "Log scheduled"}

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Arun_task

Badd_background

Cschedule_task

Dadd_task

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names like add_background or run_task.

Forgetting to call the method on background_tasks.

The method to add a background task is add_task. Other names are incorrect and cause errors.

4fill in blank

hard

Fill both blanks to create a background task that writes a message and returns a confirmation.

FastAPI

def save_data(data: str):
    with open("data.txt", "a") as file:
        file.write(data + "\n")

@app.post("/save")
async def save_endpoint([1]: BackgroundTasks, data: str):
    [2].add_task(save_data, data)
    return {"status": "Data saved in background"}

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Abackground_tasks

Brequest

Ctasks

Dbg

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for parameter and method call.

Using unrelated names like request or tasks.

The parameter name is usually background_tasks, and the same variable is used to call add_task.

5fill in blank

hard

Fill all three blanks to define a background task function, add it in the endpoint, and return a success message.

FastAPI

def [1](email: str):
    print(f"Sending email to {email}")

@app.post("/email")
async def send(email: str, [2]: BackgroundTasks):
    [2].add_task([1], email)
    return {"detail": "Email will be sent"}

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Asend_email

Bbackground_tasks

Dsend_task

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the function and task call.

Using wrong parameter names for background tasks.

The function name is send_email. The parameter for background tasks is background_tasks. The same function name is used when adding the task.