diff --git a/advlabdb/assistantModelViews.py b/advlabdb/assistantModelViews.py
index 43e0b85..cc571a2 100644
--- a/advlabdb/assistantModelViews.py
+++ b/advlabdb/assistantModelViews.py
@@ -5,7 +5,7 @@ from flask_security import admin_change_password, current_user
 from sqlalchemy import and_
 from wtforms import BooleanField, Form, RadioField, SelectField, StringField
 from wtforms.fields import DateField
-from wtforms.validators import NumberRange
+from wtforms.validators import NumberRange, Optional
 
 from . import assistantSpace, db
 from .customClasses import SecureAssistantBaseView, SecureAssistantModelView
diff --git a/advlabdb/independent_funs.py b/advlabdb/independent_funs.py
index 356bcee..5fc8576 100644
--- a/advlabdb/independent_funs.py
+++ b/advlabdb/independent_funs.py
@@ -9,7 +9,7 @@ def parse_bool(str):
     elif str_lower == "true":
         return True
     else:
-        raise (ValueError(f'Can not parse a bool from "{str}"'))
+        raise ValueError(f'Can not parse a bool from "{str}"')
 
 
 def randomPassword():