Bruno Desthuilliers wrote: > robert a écrit : > (snip) >> class MemoCache(dict): # cache expensive Objects during a session >> (memory only) >> def memo(self, k, f): >> try: return self[k] >> except KeyError: #<--------- was error >> return self.setdefault(k, f()) >> cache=MemoCache() >> ... >> >> o = cache.memo( complex-key-expr, lambda: expensive-calc-expr ) >> > > And how do you get back the cached value without rewriting both > complex-key-expr *and* expensive-calc-expr ? Or did I missed the point ?
the complex-key-expr is written only once in the code - execution inevitable. expensive-calc-expr is written only once in code and expensive execution (I have mostly matrix math) is only done at "f()" time. -robert -- http://mail.python.org/mailman/listinfo/python-list
