[Solved] What will happen if you call create_app() twice with different configs in this pattern?def create_app(config_name): app = Flask(__name__) if config_name == 'dev': app.config['DEBUG'] = True else: app.... | Flask

Flask - Ecosystem and Patterns

What will happen if you call create_app() twice with different configs in this pattern?

def create_app(config_name):
    app = Flask(__name__)
    if config_name == 'dev':
        app.config['DEBUG'] = True
    else:
        app.config['DEBUG'] = False
    return app

app1 = create_app('dev')
app2 = create_app('prod')

What is app2.config['DEBUG']?

ANone

BTrue

CFalse

DRaises an error

Step-by-Step Solution

Solution:

Step 1: Understand config logic in factory
If config_name is 'dev', DEBUG is True; otherwise False.
Step 2: Check app2 creation with 'prod'
Since 'prod' is not 'dev', DEBUG is set to False for app2.
Final Answer:
False -> Option C
Quick Check:
app2 DEBUG config = False [OK]

Quick Trick: Each app instance has its own config [OK]

Common Mistakes:

MISTAKES

Assuming app2 inherits app1 config
Expecting True for all instances
Thinking config keys are shared globally

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What will happen if you call create_app() twice with different configs in this pattern?

Step 1: Understand config logic in factory

Step 2: Check app2 creation with 'prod'

Final Answer:

Quick Check:

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