Import problems with cachetools.keys, is "keys" missing in __init__.py

[timrichardson]

there is an example in the docs https://cachetools.readthedocs.io/en/stable/

from cachetools.keys import hashkey
from threading import Lock

cache = LRUCache(maxsize=32)
lock = Lock()

@cached(cache, key=hashkey, lock=lock)
def get_pep(num):
    'Retrieve text of a Python Enhancement Proposal'
    url = 'http://www.python.org/dev/peps/pep-%04d/' % num
    with urllib.request.urlopen(url) as s:
        return s.read()

but the import line from cachetools.keys import hashkey throws a linting error in my IDE.

I am not very well versed in python modules, but I wonder if __init__.py
should have "keys" in __all__, which is currently:

"""Extensible memoizing collections and decorators."""

from .cache import Cache
from .decorators import cached, cachedmethod
from .lfu import LFUCache
from .lru import LRUCache
from .rr import RRCache
from .ttl import TTLCache

__all__ = (
    'Cache',
    'LFUCache',
    'LRUCache',
    'RRCache',
    'TTLCache',
    'cached',
    'cachedmethod'
)

__version__ = '4.1.1'

[tkem]

@timrichardson: Sorry for the delay. I don't know about your IDE, but running python3

from cachetools.keys import hashkey

does not show any errors for me.

cachetools.keys is a separate sub-module and should be imported as such, mostly for future extensions.

__all__ is used for from cachetools import *, and probably has nothing to do with your issue.