JSON response formatting in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return a JSON response using Flask.

Flask

from flask import Flask, jsonify
app = Flask(__name__)

@app.route('/')
def home():
    return [1]({'message': 'Hello, world!'})

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

Amake_response

Bjson

Crender_template

Djsonify

Attempts:

3 left

💡 Hint

Common Mistakes

Using json instead of jsonify causes errors.

Using render_template returns HTML, not JSON.

The jsonify function formats the dictionary as a JSON response in Flask.

2fill in blank

medium

Complete the code to set the HTTP status code to 201 in the JSON response.

Flask

from flask import Flask, jsonify
app = Flask(__name__)

@app.route('/create')
def create():
    return jsonify({'result': 'Created'}), [1]

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

A201

B200

C400

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Using 200 means OK but not specifically created.

Using 400 or 404 means error, not success.

Status code 201 means the resource was successfully created.

3fill in blank

hard

Fix the error in returning a JSON response with a custom header.

Flask

from flask import Flask, jsonify, make_response
app = Flask(__name__)

@app.route('/custom')
def custom():
    response = make_response(jsonify({'status': 'ok'}))
    response.headers['X-Custom-Header'] = [1]
    return response

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

ACustomValue

B'CustomValue'

C123

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes causes a NameError.

Using None is invalid for header values.

Header values must be strings, so use quotes around the value.

4fill in blank

hard

Fill both blanks to return a JSON response with a 404 status and a custom error message.

Flask

from flask import Flask, jsonify
app = Flask(__name__)

@app.route('/notfound')
def not_found():
    return jsonify({'error': [1]), [2]

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

A'Resource not found'

B404

C200

D'Success'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 200 status code for errors is incorrect.

Not quoting the error message causes syntax errors.

The JSON error message is a string, and the status code 404 means not found.

5fill in blank

hard

Fill all three blanks to create a JSON response with a nested dictionary, a 202 status code, and a custom header.

Flask

from flask import Flask, jsonify, make_response
app = Flask(__name__)

@app.route('/process')
def process():
    data = {'task': [1], 'status': 'processing'}
    response = make_response(jsonify(data), [2])
    response.headers['X-Task-ID'] = [3]
    return response

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

A'upload'

B202

C'12345'

D'done'

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers without quotes for strings causes errors.

Using wrong status codes changes response meaning.

The task name is a string, status code 202 means accepted, and the header value is a string ID.