update guide example, conf.py and remove some unused imports

docs/conf.py

@@ -7,7 +7,6 @@ import sys
 from sphinx.ext.autodoc import ClassDocumenter
 
 from stix2.base import _STIXBase
-from stix2.equivalence.graph import GRAPH_WEIGHTS
 from stix2.equivalence.object import WEIGHTS
 from stix2.version import __version__
 

docs/guide/equivalence.ipynb

@@ -4607,20 +4607,11 @@
     "    ),\n",
     "]\n",
     "\n",
-    "\n",
-    "weights = {\n",
-    "    \"_internal\": {\n",
-    "        \"ignore_spec_version\": False,\n",
-    "        \"versioning_checks\": False,\n",
-    "        \"max_depth\": 1,\n",
-    "    },\n",
-    "}\n",
-    "\n",
     "memstore1 = MemoryStore(g1)\n",
     "memstore2 = MemoryStore(g2)\n",
     "prop_scores = {}\n",
     "\n",
-    "similarity_result = env.graph_similarity(memstore1, memstore2, prop_scores, **weights)\n",
+    "similarity_result = env.graph_similarity(memstore1, memstore2, prop_scores)\n",
     "equivalence_result = env.graph_equivalence(memstore1, memstore2, threshold=60)\n",
     "\n",
     "print(similarity_result)\n",

stix2/equivalence/graph/__init__.py

@@ -2,9 +2,7 @@
 import logging
 
 from ..object import (
-    WEIGHTS, _bucket_per_type, _object_pairs, exact_match,
-    list_reference_check, object_similarity, partial_string_based,
-    partial_timestamp_based, reference_check,
+    WEIGHTS, _bucket_per_type, _object_pairs, object_similarity,
 )
 
 logger = logging.getLogger(__name__)

stix2/equivalence/object/__init__.py

@@ -412,8 +412,8 @@ def _versioned_checks(ref1, ref2, ds1, ds2, **weights):
                 object1, object2, ds1=ds1, ds2=ds2,
                 ignore_spec_version=ignore_spec_version,
                 versioning_checks=versioning_checks,
-                max_depth=max_depth, **weights
-            )
+                max_depth=max_depth, **weights,
+        )
         if ref1 not in results:
             results[ref1] = {"matched": ref2, "value": result}
         elif result > results[ref1]["value"]:
@@ -446,7 +446,7 @@ def reference_check(ref1, ref2, ds1, ds2, **weights):
                     o1, o2, ds1=ds1, ds2=ds2,
                     ignore_spec_version=ignore_spec_version,
                     versioning_checks=versioning_checks,
-                    max_depth=max_depth, **weights
+                    max_depth=max_depth, **weights,
                 ) / 100.0
 
     logger.debug(