As the question points out, this is really about python2. One would expect the answer to be "yes" and it is:
https://stackoverflow.com/questions/1...
some care is needed to install the required library in sage's python and not in another. So use something like
$ sage -sh
sage-shell$ pip install repoze.lru
I have used: from functools32 import lru_cache @lru_cache() and it works. However my functions takes elements that probably are not hashable. Indeed I get this error TypeError: <class 'sage.combinat.root_system.fundamental_group.fundamentalgroupofextendedaffineweylgroup_class_with_category.element_class'=""> is not hashable Why elements of a group are not hashable? Is there a way to use @lru_cache() for my function?
One way would be to implement hashing for the elements you want to hash. Alternatively, you could change the input of your function: it may be the case that you can, for instance, describe your element using a tuple of integers. That is hashable, so if you change your input to that then you can use lru_cache. You could then wrap your cached function in a function that takes the input type you like. In cases like this, it's usually easier and faster to implement your own caching rather than bend to the needs of a decorator.
Asked: 2018-05-29 16:41:31 +0100
Seen: 652 times
Last updated: May 29 '18
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
