code style

owrx/form/input/validator.py

@@ -13,6 +13,7 @@ class RequiredValidator(Validator):
         if value is None or value == "":
             raise ValidationError(key, "Field is required")
 
+
 class RangeValidator(Validator):
     def __init__(self, minValue, maxValue):
         self.minValue = minValue
@@ -20,7 +21,9 @@ class RangeValidator(Validator):
 
     def validate(self, key, value):
         if value is None or value == "":
-            return # Ignore empty values
+            return  # Ignore empty values
         n = float(value)
         if n < self.minValue or n > self.maxValue:
-            raise ValidationError(key, 'Value must be between %s and %s'%(self.minValue, self.maxValue))
+            raise ValidationError(
+                key, "Value must be between {min} and {max}".format(min=self.minValue, max=self.maxValue)
+            )