How to implement guide with flask-caching and redis causing unexpected cache misses in python 3.9
I'm reviewing some code and I've tried everything I can think of but I tried several approaches but none seem to work. I'm trying to configure I'm implementing caching in my Flask application using Flask-Caching with Redis as the backend... However, I'm working with unexpected cache misses that seem to occur randomly. My setup uses the following versions: Flask==1.1.2, Flask-Caching==1.10.1, and redis==3.5.3. Here's how I've set up the cache in my app: ```python from flask import Flask from flask_caching import Cache app = Flask(__name__) app.config['CACHE_TYPE'] = 'RedisCache' app.config['CACHE_REDIS_URL'] = 'redis://localhost:6379/0' cache = Cache(app) @app.route('/data') @cache.cached(timeout=60) def get_data(): # Simulate a data fetching process data = fetch_data_from_database() return data ``` The `fetch_data_from_database` function queries a database for some data. I expected that subsequent requests within 60 seconds would hit the cache, but I noticed that some requests return a fresh response from the database instead of the cached data. Here’s an example of the response times: - First request: 200ms (data fetched from DB) - Second request (within the timeout): 180ms (data fetched from cache) - Third request (after 60 seconds): 210ms (data fetched from DB) - Fourth request (within timeout): 300ms (data fetched from DB again!) I've verified that Redis is running and responding to commands. Additionally, I checked the logs and noticed that no cache keys are being deleted unexpectedly. I also tried using `cache.clear()` explicitly before fetching data, but it didn't resolve the scenario. Could this be a question with how the cache is configured or how Flask-Caching interacts with Redis? Any insights would be greatly appreciated! The stack includes Python and several other technologies. Thanks for taking the time to read this! I'm on Debian using the latest version of Python. Has anyone dealt with something similar? I've been using Python for about a year now. What am I doing wrong? This issue appeared after updating to Python stable. What would be the recommended way to handle this? I'm working in a Debian environment. I'd love to hear your thoughts on this.