Set Up Flask-Caching
Choose a backend and init the cache.
Set Up Flask-Caching is a free Flask Academy lesson on CoddyKit — lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Flask Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Why Caching Matters
When the same answer gets computed over and over, you waste time. Caching stores a result once and serves it instantly next time. ⚡
What Flask-Caching Adds
Flask-Caching is an extension that bolts a cache layer onto your app, so you can save view output or function results with almost no code.
Install the Extension
You start by installing the package from PyPI. This pulls in Flask-Caching and makes the Cache class available to import.
pip install Flask-CachingImport the Cache Class
The whole extension centers on one object. You import the Cache class and will create a single instance to manage all cached data.
from flask_caching import CachePick a Cache Backend
A backend decides where cached data lives. SimpleCache keeps it in memory, while Redis or Memcached share it across many processes.
SimpleCache for Local Dev
For learning and tiny apps, SimpleCache is perfect: it stores values in the process memory with zero extra services to run.
config = {"CACHE_TYPE": "SimpleCache"}Configure with a Dict
You tell Flask-Caching how to behave through config keys like CACHE_TYPE. These can sit in your app config or a plain dict.
app.config["CACHE_TYPE"] = "SimpleCache"Create the Cache Object
You build one Cache instance for the whole app. Passing the app now binds the cache immediately so it is ready to use.
cache = Cache(app)The init_app Pattern
With an app factory you defer binding. You create the cache empty, then call init_app later once the app exists.
cache = Cache()
cache.init_app(app)Set a Default Timeout
The CACHE_DEFAULT_TIMEOUT key sets how many seconds entries live before they expire, so stale data does not linger forever.
app.config["CACHE_DEFAULT_TIMEOUT"] = 300Verify It Works
A quick smoke test: store a value and read it straight back. If both lines agree, your cache is wired up correctly. ✅
cache.set("k", 42)
print(cache.get("k"))Quick Check
You want a cache that needs no external server during local development.
Recap: Setup
You installed Flask-Caching, picked a backend, created one Cache object, and set a default timeout. The cache is ready to use. 🎉
Frequently asked questions
Is the “Set Up Flask-Caching” lesson free?
Yes — the full text of “Set Up Flask-Caching” is free to read here on the web, and the Flask Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Flask Academy course, upgrade to CoddyKit PRO.
What will I learn in “Set Up Flask-Caching”?
Choose a backend and init the cache. You practise Flask Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Flask Academy?
No prior experience is required. Flask Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Set Up Flask-Caching” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Flask Academy lesson?
Yes. Every Flask Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.