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Author serhiy.storchaka
Recipients Manjusaka, Scott Sanderson2, rhettinger, serhiy.storchaka
Date 2019-10-24.07:33:27
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <>
It is easy:

diff --git a/Lib/ b/Lib/
index 3192bd02d9..52c07db749 100644
--- a/Lib/
+++ b/Lib/
@@ -499,7 +499,9 @@ def lru_cache(maxsize=128, typed=False):
         # The user_function was passed in directly via the maxsize argument
         user_function, maxsize = maxsize, 128
         wrapper = _lru_cache_wrapper(user_function, maxsize, typed, _CacheInfo)
-        return update_wrapper(wrapper, user_function)
+        func = update_wrapper(wrapper, user_function)
+        func.cache_parameters = lambda: {'maxsize': maxsize, 'typed': typed}
+        return func
     elif maxsize is not None:
         raise TypeError(
             'Expected first argument to be an integer, a callable, or None')

But there are many design questions. Why method instead of just attribute?

        func.cache_parameters = {'maxsize': maxsize, 'typed': typed}

Or maybe just add the "typed" attribute?

        func.typed = typed

Also I consider adding the more general "make_key" parameter to lru_cache(). The "typed" parameter would just specify the default value for "make_key".
Date User Action Args
2019-10-24 07:33:27serhiy.storchakasetrecipients: + serhiy.storchaka, rhettinger, Scott Sanderson2, Manjusaka
2019-10-24 07:33:27serhiy.storchakasetmessageid: <>
2019-10-24 07:33:27serhiy.storchakalinkissue38565 messages
2019-10-24 07:33:27serhiy.storchakacreate