[Solved] Examine this Flask extension initialization code:from flask import Flask from flask_login import LoginManager login_manager = LoginManager() def create_app(): app = Flask(__name__) login_manager.... | Flask

Flask - Middleware and Extensions

Examine this Flask extension initialization code:

from flask import Flask
from flask_login import LoginManager

login_manager = LoginManager()

def create_app():
    app = Flask(__name__)
    login_manager.init_app()
    return app

What is the issue with this code?

AFlask app must be created before importing LoginManager

BLoginManager must be instantiated inside create_app()

Cinit_app() is called without passing the Flask app instance

Dinit_app() should be called after returning the app

Step-by-Step Solution

Solution:

Step 1: Check init_app() usage
The init_app() method requires the Flask app instance as an argument.
Step 2: Identify the error
In the code, login_manager.init_app() is called without any argument, which will raise a TypeError.
Final Answer:
init_app() is called without passing the Flask app instance -> Option C
Quick Check:
init_app(app) requires app argument [OK]

Quick Trick: Always pass app instance to init_app() [OK]

Common Mistakes:

MISTAKES

Forgetting to pass the app instance to init_app()
Instantiating extension inside create_app() unnecessarily
Calling init_app() after returning the app

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More Flask Quizzes

Examine this Flask extension initialization code:

Step 1: Check init_app() usage

Step 2: Identify the error

Final Answer:

Quick Check:

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