more cleanup

Author: nicolaskruchten

Diff for: packages/python/plotly/plotly/express/_core.py

@@ -348,7 +348,7 @@ def make_trace_kwargs(args, trace_spec, trace_data, mapping_labels, sizeref):
             elif attr_name == "custom_data":
                 # here we store a data frame in customdata, and it's serialized
                 # as a list of row lists, which is what we want
-                trace_patch["customdata"] = np.array(trace_data[attr_value])
+                trace_patch["customdata"] = trace_data[attr_value]
             elif attr_name == "hover_name":
                 if trace_spec.constructor not in [
                     go.Histogram,
@@ -381,7 +381,7 @@ def make_trace_kwargs(args, trace_spec, trace_data, mapping_labels, sizeref):
 
                     # here we store a data frame in customdata, and it's serialized
                     # as a list of row lists, which is what we want
-                    trace_patch["customdata"] = np.array(trace_data[customdata_cols])
+                    trace_patch["customdata"] = trace_data[customdata_cols]
             elif attr_name == "color":
                 if trace_spec.constructor in [go.Choropleth, go.Choroplethmapbox]:
                     trace_patch["z"] = trace_data[attr_value]