How do you correctly initialize a Flask application in Python?

easy📝 Syntax Q3 of 15

Flask - Ecosystem and Patterns

Aapp = Flask()

Bapp = Flask(app_name)

Capp = Flask('myapp')

Dapp = Flask(__name__)

Step-by-Step Solution

Solution:

Step 1: Understand Flask app initialization
The Flask constructor requires the current module's name, which is passed as __name__.
Step 2: Evaluate options
app = Flask(__name__) correctly uses Flask(__name__). app = Flask(app_name) uses an undefined variable app_name. app = Flask('myapp') uses a string but not the module name, which is not recommended. app = Flask() misses the required argument.
Final Answer:
app = Flask(__name__) -> Option D
Quick Check:
Flask app needs module name [OK]

Quick Trick: Use __name__ to initialize Flask app [OK]

Common Mistakes:

MISTAKES

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