def __init__(self, fn):
self._callable = fn
self.in_call = False
def __call__(self, *args, **kwds):
if self.in_call:
raise RuntimeError('Identified recursion!')
self.in_call = True
try:
result = self._callable(*args, **kwds)
finally:
self.in_call = False
return result
protect_against_recursion = simple_decorator(ProtectAgainstRecursion)
class Memoize(object):
def __init__(self,function):
self._callable = function
self.set_cache_enabled(True)
self.logging_level = None
def set_cache_enabled(self, value):
self._cache_enabled = value
def has_cached_value(self):
try:
logging.basicConfig(level=logging.INFO)
class Memoize(object):
def __init__(self,function):
self._callable = function
def __call__(self):
try:
return self.cached_value
except AttributeError:
self.cached_value = self._callable()
return self.cached_value
memoize = simple_decorator(Memoize)
class Klass(object):
def __init__(self):
self._calculate_value = memoize(self._calculate_value)
def _calculate_value(self):
logging.info('id=%d: Calculating value', id(self))
return 5 * 3
def _get_value(self):
return self._calculate_value()
