regarding memoize function

[ankitks.mital]

I saw example of memoize function...here is snippet

def memoize(fn, slot):
def memoized_fn(obj , *args):
if hasattr(obj, slot):
return getattr(obj, slot)
else:
val = fn(obj, *args)
setattr(obj, slot, val)
return val
return memoized_fn
and I am really clueless, about what it does. I know in general we try
to keep computed values for future usage. But I am having hard-time
visualizing it.
What is obj here? and what does *args means?
Thanks

[Dan Bishop]

On Apr 3, 6:33 pm, ankitks.mi...@g mail.com wrote:

I saw example of memoize function...here is snippet

def memoize(fn, slot):
def memoized_fn(obj , *args):
if hasattr(obj, slot):
return getattr(obj, slot)
else:
val = fn(obj, *args)
setattr(obj, slot, val)
return val
return memoized_fn

and I am really clueless, about what it does. I know in general we try
to keep computed values for future usage. But I am having hard-time
visualizing it.
What is obj here? and what does *args means?

*args is Python's syntax for variadic functions.

[Gabriel Genellina]

En Thu, 03 Apr 2008 21:21:11 -0300, Dan Bishop <da*****@yahoo. com>
escribió:

On Apr 3, 6:33 pm, ankitks.mi...@g mail.com wrote:

>I saw example of memoize function...here is snippet

def memoize(fn, slot):
def memoized_fn(obj , *args):
if hasattr(obj, slot):
return getattr(obj, slot)
else:
val = fn(obj, *args)
setattr(obj, slot, val)
return val
return memoized_fn

and I am really clueless, about what it does. I know in general we try
to keep computed values for future usage. But I am having hard-time
visualizing it.
What is obj here? and what does *args means?

*args is Python's syntax for variadic functions.

In case the strange name gives you nothing, see section 4.7 in the
Tutorial [1]
For a much simpler implementation, see this FAQ entry [2]

[1] http://docs.python.org/tut/node6.htm...00000000000000
[2]
http://www.python.org/doc/faq/genera...etween-objects

--
Gabriel Genellina