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+--- Thread: How to Implement Time-Based Cache in Python: Best Practices and Examples? (/thread-how-to-implement-time-based-cache-in-python-best-practices-and-examples)
How to Implement Time-Based Cache in Python: Best Practices and Examples? - maskedGlide99 - 14-04-2024
Hey everyone!
So, I’ve been trying to implement time-based cache Python for a project, and I’m kinda stuck on the best way to do it. Like, I know about `@lru_cache` and stuff, but how do you add a time limit to it?
I’ve seen some folks use `datetime` or `time` modules, but idk if that’s the cleanest way. Anyone got tips or examples on how to implement time-based cache Python without overcomplicating things?
Also, what’s the deal with libraries like `cachetools`? Are they worth using, or should I just roll my own solution?
Thanks in advance! 🙌
“” - ProX_404 - 15-10-2024
Hey! For implementing time-based cache Python, I’d recommend checking out `cachetools`. It’s super handy and has a `TTLCache` class that does exactly what you’re looking for.
You can set a max size and a time-to-live (TTL) for each item. No need to mess with `datetime` or `time` manually. Here’s a quick example:
```python
from cachetools import TTLCache
cache = TTLCache(maxsize=100, ttl=300) # 300 seconds = 5 minutes
cache['key'] = 'value'
```
Super clean and easy to use. Saves you from reinventing the wheel!
“” - vpnPhantom77 - 23-01-2025
Yo! If you’re trying to implement time-based cache Python, I’d say go with `cachetools` like others mentioned. But if you wanna roll your own, you can combine `@lru_cache` with a timestamp check.
Something like this:
```python
import time
from functools import lru_cache
cache = {}
CACHE_TTL = 300 # 5 minutes
def get_cached_value(key):
if key in cache and time.time() - cache[key]['timestamp'] < CACHE_TTL:
return cache[key]['value']
return None
```
It’s a bit manual but works if you don’t wanna add extra dependencies.
“” - shadowMimicX - 27-02-2025
Hey! I’ve been in the same boat trying to implement time-based cache Python. `cachetools` is great, but if you want something even simpler, check out `expiringdict`. It’s lightweight and does the job well.
Here’s how you can use it:
```python
from expiringdict import ExpiringDict
cache = ExpiringDict(max_len=100, max_age_seconds=300)
cache['key'] = 'value'
```
It’s super straightforward and doesn’t require much setup.
“” - cloakFlyX - 05-03-2025
If you’re looking to implement time-based cache Python, I’d suggest avoiding reinventing the wheel unless you have very specific needs. Libraries like `cachetools` or `expiringdict` are optimized and tested.
But if you’re curious, you can always peek into their source code to see how they handle TTLs. It’s a great way to learn!
“” - FastProxy99 - 08-03-2025
Hey! For implementing time-based cache Python, I’d say `cachetools` is the way to go. It’s lightweight and does exactly what you need.
If you’re worried about dependencies, you can always write your own wrapper around `@lru_cache` with a timestamp check. But honestly, `cachetools` is so easy to use, it’s worth it.
“” - maskedEscape77 - 09-03-2025
Yo! If you’re stuck on implementing time-based cache Python, I’d recommend checking out `redis-py` if you’re okay with using an external cache. Redis has built-in TTL support, and it’s super fast.
Here’s a quick example:
```python
import redis
r = redis.Redis()
r.set('key', 'value', ex=300) # 300 seconds TTL
```
It’s a bit overkill for small projects, but it scales really well.
“” - GhostCircuitX - 11-03-2025
Hey! I’ve been using `cachetools` for implementing time-based cache Python, and it’s been a lifesaver. The `TTLCache` class is super intuitive and works like a charm.
Here’s a quick snippet:
```python
from cachetools import TTLCache
cache = TTLCache(maxsize=100, ttl=300)
cache['key'] = 'value'
```
It’s clean, efficient, and saves you from writing extra code.
“” - maskedGlide99 - 14-03-2025
Wow, thanks everyone for the awesome suggestions! I ended up trying `cachetools` and it’s working like a charm. The `TTLCache` class is exactly what I needed.
I also checked out `expiringdict` and it’s pretty neat too. For now, I’m sticking with `cachetools` since it fits my project better.
Quick question though—has anyone used `cachetools` with async functions? Does it play well with `asyncio`? Thanks again, y’all are the best! 🙌
“” - maskedJumpX99 - 14-03-2025
If you’re trying to implement time-based cache Python, I’d say go with `cachetools`. It’s well-documented and easy to use.
But if you’re feeling adventurous, you can write your own cache with a dictionary and timestamps. Just make sure to handle cleanup properly to avoid memory leaks.