Fix indent. Remove trailing whitespace (trailing-whitespace). Do not use len sequence to determine if a sequence is empty (len-as-condition).

Author: jbampton

plotly/figure_factory/utils.py

@@ -421,10 +421,10 @@ def validate_scale_values(scale):
         )
 
     if not all(x < y for x, y in zip(scale, scale[1:])):
-            raise exceptions.PlotlyError(
-                "'scale' must be a list that contains a strictly increasing "
-                "sequence of numbers."
-            )
+        raise exceptions.PlotlyError(
+            "'scale' must be a list that contains a strictly increasing "
+            "sequence of numbers."
+        )
 
 
 def validate_colorscale(colorscale):