Added FunctionCacheManager.

1 files changed, 15 insertions, 2 deletions

diff --git a/pylru.py b/pylru.py
index a6fce0f..4953b8b 100644
--- a/pylru.py
+++ b/pylru.py
@@ -501,7 +501,22 @@ class WriteBackCacheManager(object):
         return False
 
 
+class FunctionCacheManager(object):
+    def __init__(self, func, size):
+        self.func = func
+        self.cache = lrucache(size)
+
+    def __call__(self, *args, **kwargs):
+        kwtuple = tuple((key, kwargs[key]) for key in sorted(kwargs.keys()))
+        key = (args, kwtuple)
+        try:
+            return self.cache[key]
+        except KeyError:
+            pass
 
+        value = self.func(*args, **kwargs)
+        self.cache[key] = value
+        return value
 
 
 def lruwrap(store, size, writeback=False):
@@ -511,8 +526,6 @@ def lruwrap(store, size, writeback=False):
         return WriteThroughCacheManager(store, size)
 
 
-
-
 class lrudecorator(object):
     def __init__(self, size):
         self.cache = lrucache(size)