From e74271e1b54899039380a990905922fddc671a42 Mon Sep 17 00:00:00 2001
From: Paul McCarthy <pauldmccarthy@gmail.com>
Date: Tue, 1 May 2018 18:07:36 +0100
Subject: [PATCH] ENH: memoize.skipUnchanged has an invalidate "method"
---
fsl/utils/memoize.py | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/fsl/utils/memoize.py b/fsl/utils/memoize.py
index cbe95a449..b777eed0c 100644
--- a/fsl/utils/memoize.py
+++ b/fsl/utils/memoize.py
@@ -205,6 +205,18 @@ def skipUnchanged(func):
*not* called. If the given value is different from the cached value (or
there is no value), the decorated function is called.
+
+ The ``invalidate`` method may be called on a ``skipUnchanged``-decorated
+ function to clear the internal cache. For example::
+
+ @skipUnchanged
+ def setval(name, value):
+ # ...
+
+ # ...
+
+ setval.invalidate()
+
.. note:: This decorator ignores the return value of the decorated
function.
@@ -216,6 +228,10 @@ def skipUnchanged(func):
cache = {}
+ # TODO merge skipUnchanged and Memoize somehow
+ def invalidate():
+ cache.clear()
+
def wrapper(name, value, *args, **kwargs):
oldVal = cache.get(name, None)
@@ -243,6 +259,8 @@ def skipUnchanged(func):
return True
+ wrapper.invalidate = invalidate
+
return wrapper
--
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