[Solved] Given this Flask route:@app.route('/profile/') def profile(user_id): profile_data = profile_service.fetch_profile(user_id) if profile_data is None:... | Flask

Flask - Ecosystem and Patterns

Given this Flask route:

@app.route('/profile/')
def profile(user_id):
    profile_data = profile_service.fetch_profile(user_id)
    if profile_data is None:
        return 'Profile not found', 404
    return profile_data

What will the route return if fetch_profile returns None?

AA 500 Internal Server Error

BA 404 response with 'Profile not found'

CAn empty JSON response

DA redirect to the homepage

Step-by-Step Solution

Solution:

Step 1: Analyze the route logic
The route checks if profile_data is None.
Step 2: Determine the response
If None, it returns 'Profile not found' with status code 404.
Final Answer:
A 404 response with 'Profile not found' -> Option B
Quick Check:
None triggers 404 response [OK]

Quick Trick: None return triggers 404 response [OK]

Common Mistakes:

MISTAKES

Assuming None causes 500 error
Expecting empty JSON instead of error message
Thinking it redirects automatically

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Given this Flask route:

Step 1: Analyze the route logic

Step 2: Determine the response

Final Answer:

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