[Solved] This code snippet throws an error:from flask import Flask from flask_caching import Cache app = Flask(__name__) cache = Cache(app, config={'CACHE_TYPE': 'simple'}) cache.... | Flask

Flask - Ecosystem and Patterns

This code snippet throws an error:

from flask import Flask
from flask_caching import Cache
app = Flask(__name__)
cache = Cache(app, config={'CACHE_TYPE': 'simple'})
cache.init_app(app)

What is the problem?

AFlask app instance is not created

BCACHE_TYPE 'simple' is invalid

CCache extension is not installed

DCalling init_app after passing app to Cache constructor causes error

Step-by-Step Solution

Solution:

Step 1: Analyze Cache initialization
Passing app to Cache constructor initializes it immediately; calling init_app again is redundant and causes error.
Step 2: Identify correct usage
Either pass app in constructor or call init_app later, not both.
Final Answer:
Calling init_app after passing app to Cache constructor causes error -> Option D
Quick Check:
Double init causes error = init_app misuse [OK]

Quick Trick: Use either constructor app param or init_app, not both [OK]

Common Mistakes:

MISTAKES

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This code snippet throws an error: