diff --git a/kallithea/controllers/api/api.py b/kallithea/controllers/api/api.py
--- a/kallithea/controllers/api/api.py
+++ b/kallithea/controllers/api/api.py
@@ -898,7 +898,7 @@ class ApiController(JSONRPCController):
 
         try:
             ugm = UserGroupModel().add_user_to_group(user_group, user)
-            success = True if ugm != True else False
+            success = True if ugm is not True else False
             msg = 'added member `%s` to user group `%s`' % (
                 user.username, user_group.users_group_name
             )
diff --git a/kallithea/lib/recaptcha.py b/kallithea/lib/recaptcha.py
--- a/kallithea/lib/recaptcha.py
+++ b/kallithea/lib/recaptcha.py
@@ -51,7 +51,7 @@ def submit(g_recaptcha_response, private
 
     if not (isinstance(return_values, dict)):
         return RecaptchaResponse(is_valid=False, error_code='incorrect-captcha-sol')
-    elif (("success" in return_values) and ((return_values["success"] == True) or (return_values["success"] == "true"))):
+    elif (("success" in return_values) and ((return_values["success"] is True) or (return_values["success"] == "true"))):
         return RecaptchaResponse(is_valid=True)
     elif (("error-codes" in return_values) and isinstance(return_values["error-codes"], list) and (len(return_values["error-codes"]) > 0)):
         return RecaptchaResponse(is_valid=False, error_code=return_values["error-codes"][0])
diff --git a/kallithea/model/user_group.py b/kallithea/model/user_group.py
--- a/kallithea/model/user_group.py
+++ b/kallithea/model/user_group.py
@@ -166,6 +166,7 @@ class UserGroupModel(object):
             raise
 
     def add_user_to_group(self, user_group, user):
+        """Return True if user already is in the group - else return the new UserGroupMember"""
         user_group = UserGroup.guess_instance(user_group)
         user = User.guess_instance(user)