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Try to save memory and time when using lazy objects by refering to their function via the closure, and not making it an attribute on each instance.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17360 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -66,7 +66,6 @@ def lazy(func, *resultclasses):
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__dispatch = None
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def __init__(self, args, kw):
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self.__func = func
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self.__args = args
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self.__kw = kw
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if self.__dispatch is None:
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@ -75,7 +74,7 @@ def lazy(func, *resultclasses):
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def __reduce__(self):
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return (
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_lazy_proxy_unpickle,
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(self.__func, self.__args, self.__kw) + resultclasses
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(func, self.__args, self.__kw) + resultclasses
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)
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def __prepare_class__(cls):
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@ -100,13 +99,13 @@ def lazy(func, *resultclasses):
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cls.__str__ = cls.__str_cast
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__prepare_class__ = classmethod(__prepare_class__)
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def __promise__(cls, klass, funcname, func):
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def __promise__(cls, klass, funcname, method):
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# Builds a wrapper around some magic method and registers that magic
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# method for the given type and method name.
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def __wrapper__(self, *args, **kw):
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# Automatically triggers the evaluation of a lazy value and
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# applies the given magic method of the result type.
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res = self.__func(*self.__args, **self.__kw)
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res = func(*self.__args, **self.__kw)
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for t in type(res).mro():
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if t in self.__dispatch:
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return self.__dispatch[t][funcname](res, *args, **kw)
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@ -114,23 +113,23 @@ def lazy(func, *resultclasses):
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if klass not in cls.__dispatch:
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cls.__dispatch[klass] = {}
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cls.__dispatch[klass][funcname] = func
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cls.__dispatch[klass][funcname] = method
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return __wrapper__
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__promise__ = classmethod(__promise__)
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def __unicode_cast(self):
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return self.__func(*self.__args, **self.__kw)
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return func(*self.__args, **self.__kw)
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def __str_cast(self):
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return str(self.__func(*self.__args, **self.__kw))
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return str(func(*self.__args, **self.__kw))
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def __cmp__(self, rhs):
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if self._delegate_str:
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s = str(self.__func(*self.__args, **self.__kw))
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s = str(func(*self.__args, **self.__kw))
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elif self._delegate_unicode:
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s = unicode(self.__func(*self.__args, **self.__kw))
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s = unicode(func(*self.__args, **self.__kw))
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else:
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s = self.__func(*self.__args, **self.__kw)
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s = func(*self.__args, **self.__kw)
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if isinstance(rhs, Promise):
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return -cmp(rhs, s)
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else:
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