def cached(f):
name = f.__name__
def wrapper(self):
- if self.cache is None:
+ cache = self.cache
+ if cache is None:
return f(self)
- if name not in self.cache:
- self.cache[name] = (True, f(self))
- return self.cache[name][1]
+ if name not in cache:
+ cache[name] = (True, f(self))
+ return cache[name][1]
return wrapper
+class ElementError(Exception):
+ def __init__(self, message):
+ self.message = message
+
+ def __str__(self):
+ return self.message
+
class Element(object):
CHANGED_DEFAULT = 0 # initial "pull" state
CHANGED_ALL = 1 # really everything changed