use the qualified name as the cache key (#2719)

Author: kayween

gpytorch/utils/memoize.py

@@ -55,7 +55,7 @@ def _cached(method=None, name=None):
 
     @functools.wraps(method)
     def g(self, *args, **kwargs):
-        cache_name = name if name is not None else method
+        cache_name = name if name is not None else method.__qualname__
         kwargs_pkl = pickle.dumps(kwargs)
         if not _is_in_cache(self, cache_name, *args, kwargs_pkl=kwargs_pkl):
             return _add_to_cache(self, cache_name, method(self, *args, **kwargs), *args, kwargs_pkl=kwargs_pkl)
@@ -73,7 +73,7 @@ def _cached_ignore_args(method=None, name=None):
 
     @functools.wraps(method)
     def g(self, *args, **kwargs):
-        cache_name = name if name is not None else method
+        cache_name = name if name is not None else method.__qualname__
         if not _is_in_cache_ignore_args(self, cache_name):
             return _add_to_cache_ignore_args(self, cache_name, method(self, *args, **kwargs))
         return _get_from_cache_ignore_args(self, cache_name)