Handle list/tuple of graph objects when validate=False

Author: jonmmease

Diff for: packages/python/plotly/plotly/basedatatypes.py

@@ -3548,10 +3548,22 @@ def __setitem__(self, prop, value):
             else:
                 # Make sure properties dict is initialized
                 self._init_props()
+
                 if isinstance(value, BasePlotlyType):
                     # Extract json from graph objects
                     value = value.to_plotly_json()
 
+                # Check for list/tuple of graph objects
+                if (
+                    isinstance(value, (list, tuple))
+                    and value
+                    and isinstance(value[0], BasePlotlyType)
+                ):
+                    value = [
+                        v.to_plotly_json() if isinstance(v, BasePlotlyType) else v
+                        for v in value
+                    ]
+
                 self._props[prop] = value
 
                 # Remove any already constructed graph object so that it will be