from functools import wraps from django core cache import cache from d

from functools import wraps

from django.core.cache import cache
from django.db.models import signals


def cachedel(keyfunc, sender):
    def inner(instance, *args, **kwargs):
        key = keyfunc(instance)
        cache.delete(key)
    signals.post_save.connect(inner, sender=sender)
    signals.post_delete.connect(inner, sender=sender)


def cached(keyfunc):
    def wrapper(func):
        @wraps(func)
        def inner(*args, **kwargs):
            key = keyfunc(*args, **kwargs)
            out = cache.get(key)
            if out is None:
                out = func(*args, **kwargs)
                cache.set(key, out)
            return out
        return inner
    return wrapper