Background file processing in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the correct FastAPI class.

FastAPI

from fastapi import [1]
app = [1]()

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AFastAPI

BRequest

CBackgroundTasks

DResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Importing BackgroundTasks instead of FastAPI

Using Request instead of FastAPI

The FastAPI class is imported to create the app instance.

2fill in blank

medium

Complete the code to import BackgroundTasks for running tasks in background.

FastAPI

from fastapi import FastAPI, [1]

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ABackgroundTasks

BRequest

CDepends

DUploadFile

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Request or Depends instead

Forgetting to import BackgroundTasks

BackgroundTasks is imported to schedule background jobs.

3fill in blank

hard

Fix the error in the endpoint to accept BackgroundTasks as a parameter.

FastAPI

@app.post('/upload')
async def upload_file(file: bytes, [1]):
    background_tasks.add_task(process_file, file)
    return {'message': 'File received'}

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Arequest: Request

Bbg: BackgroundTasks

Ctasks: BackgroundTasks

Dbackground_tasks: BackgroundTasks

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parameter name

Wrong type annotation

Missing BackgroundTasks import

The parameter must be named and typed as background_tasks: BackgroundTasks to use FastAPI's background task system.

4fill in blank

hard

Fill both blanks to schedule the background task correctly.

FastAPI

async def upload(file: bytes, background_tasks: BackgroundTasks):
    background_tasks.[1](process_file, [2])
    return {'status': 'processing'}

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Aadd_task

Bfile

Cprocess_file

Drun_task

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method name

Passing wrong argument to the task

Use add_task method to schedule process_file with file as argument.

5fill in blank

hard

Fill all three blanks to define a background task function and schedule it.

FastAPI

def [1](file: bytes):
    # simulate processing
    print(f'Processing file of size: {len([2])} bytes')

@app.post('/upload')
async def upload(file: bytes, background_tasks: BackgroundTasks):
    background_tasks.[3]([1], file)
    return {'message': 'File is being processed'}

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Aprocess_file

Bfile

Cadd_task

Dupload_file

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching function names

Wrong method to schedule task

Incorrect parameter usage

The function is named process_file, it uses the file parameter, and add_task schedules it.