On Sun, 09 Oct 2005 13:43:38 +0200, Fredrik Lundh wrote: > Steven D'Aprano wrote: > >> I notice that type(some_closure) and type(ordinary_function) both return >> the same result, <type 'function'>. I also notice that both the closure >> and ordinary functions have an attribute "func_closure". Is there a way to >> tell which is a closure and which is not? In my tests, the ordinary >> function has func_closure == None, but I don't know if that will always be >> the case of just for my tests. > > closure != function. > > (did you read the wikipedia page?
Yes I did. Did you read my post? If you create a closure, using a memoization technique as per the original post, and then call type() on that closure, Python reports <type 'function'>. If you use dir() on that closure-that-Python-calls-a-function, it tells you that there is an attribute "func_closure". But ordinary functions that aren't closures also have that attribute. According to my tests, ordinary functions have None as the func_closure attribute, but I don't know if that will always be the case, or just the few examples I tested it. With a sample size of three, I have no confidence that I've found a bullet-proof test. Other that that, thank you for the links. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
