Review / cleanup of basedatatypes.py

Author: Jon M. Mease

_plotly_utils/basevalidators.py

@@ -1565,11 +1565,6 @@ def data_class(self):
 
     def validate_coerce(self, v):
 
-        if isinstance(self.data_class, str):
-            raise ValueError(
-                "Invalid data_class of type 'string': {data_class}"
-                .format(data_class=self.data_class))
-
         if v is None:
             v = ()
 

codegen/datatypes.py

@@ -171,7 +171,7 @@ def {literal_node.name_property}(self) -> {prop_type}:
     # property parent name
     # --------------------
     @property
-    def _parent_path(self) -> str:
+    def _parent_path_str(self) -> str:
         return '{node.parent_path_str}'
 
     # Self properties description

js/src/Figure.js

@@ -1628,7 +1628,7 @@ function performRestyleLike(parentArray, restyleData, restyleTraces) {
             // Set property value
             if (singleVal === null) {
                 _.unset(trace, rawKey);
-            } else {
+            } else if (singleVal !== undefined){
                 _.set(trace, rawKey, singleVal);
             }
         }