Async cache
Project description
acache: async cache for python
Those are two implementations of async caches for python.
A implementation of lru_cache
and an implementation of a cache based on time.
Install
# from pip
pip3 install --user python-acache
# from github
pip3 install git+https://github.com/Dimfred/acache.git
Alternatives
The difference in my package is that if you call a function with the same args, from different threads the second one will not return a value until the first one is completed, s.t. the value gets definitely cached. Additionally, I allow overwriting the key generation function, so you can pick your own. Also my naming is different, and maybe more pythonic (whatever).
Usage
from acache import alru_cache, attl_cache
# basic lru
@alru_cache(maxsize=2)
async def i_am_cached(foo):
return foo
# use with custom key function
@alru_cache(maxsize=2, make_key=lambda x: type(x))
async def i_cache_based_on_the_input_type(foo)
return foo
class A:
pass
res1 = await i_cache_based_on_the_input_type(A())
res2 = await i_cache_based_on_the_input_type(A())
assert id(res1) == id(res2) # TRUE
# time cache
@attl_cache(seconds=1)
async def cached_for_1_s(bar):
return bar
res1 = await cached_for_1_s(1)
res2 = await cached_for_1_s(2)
assert res1 == res2
# wait 1 second
res3 = await cached_for_1_s(3)
assert res1 != res3
# key function also applies to the attl_cache
Synopsis
def alru_cache(self, maxsize: int = 128, make_key=None):
...
def attl_cache(
self,
weeks=0,
days=0,
hours=0,
minutes=0,
seconds=0,
milliseconds=0,
microseconds=0,
maxsize=128,
make_key=None,
):
...
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