fixing option use_attributes: removing attributes from schema.slots (#133)

Co-authored-by: Chris Mungall <cjm@berkeleybop.org>

Author: djarecka

schemasheets/schemamaker.py

@@ -6,6 +6,7 @@
 import logging
 import tempfile
 from urllib.request import urlopen
+from copy import copy
 
 import click
 import yaml
@@ -236,7 +237,10 @@ def get_current_element(self, elt: Element) -> Union[Element, PermissibleValue]:
             if isinstance(elt, ClassDefinition):
                 ix = sc.classes
             elif isinstance(elt, SlotDefinition):
-                ix = sc.slots
+                if self.use_attributes:
+                    ix = copy(sc.slots)
+                else:
+                    ix = sc.slots
             elif isinstance(elt, EnumDefinition):
                 ix = sc.enums
             elif isinstance(elt, TypeDefinition):