I did not follow the grok bit..
He's creating a Descriptor within class 'Spam' by doing
@Profiled
def bar()
because Profiled replaces 'bar' with it's instance that contains __get__
which means I have to do s.grok = 20 to trigger it? Which would imply,
s.__get__(instance, instance, value) NOT whatever he's done.. ? How is
he passing Spam to 'grok'? It should be (self=decorator-instance, Spam-
instance-s and value) being passed to __get__
(for those who don't have the book, he's switched to 'grok' instead of
'bar')
>>> s = Spam()
>>> def grok(self, x):
... pass
...
>>> grok.__get__(s, Spam)
class Spam:
@Profiled
def bar(self, x):
print(self, x)
import types
from functools import wraps
class Profiled:
def __init__(self, func):
wraps(func)(self)
self.ncalls = 0
def __call__(self, *args, **kwargs):
self.ncalls += 1
return self.__wrapped__(*args, **kwargs)
def __get__(self, instance, cls):
if instance is None:
return self
else:
return types.MethodType(self, instance)
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