diff --git a/libs/schemas/xaal/schemas/dev_builder.py b/libs/schemas/xaal/schemas/dev_builder.py
index e9efa3c3e05c6b7935b9936d3791a7fa807aba28..642581c0c2b8ea4e4b748d73cb0b8134e7a09b45 100644
--- a/libs/schemas/xaal/schemas/dev_builder.py
+++ b/libs/schemas/xaal/schemas/dev_builder.py
@@ -1,5 +1,4 @@
 from mako.template import Template
-import sys
 import os
 import json
 from pprint import pprint
@@ -52,7 +51,7 @@ class Schemas:
     def __init__(self):
         self.__cache = {}
 
-    def load(self,filename):
+    def load(self, filename):
         """ load schema from disk, and put it in cache
             return the file as dict"""
         if filename in self.__cache.keys():
@@ -66,7 +65,7 @@ class Schemas:
         return jsonDict
 
 
-    def get_extends(self,name):
+    def get_extends(self, name):
         """return the chain list off extends in reverse order, any.any is the first item"""
         current = name
 
@@ -82,7 +81,7 @@ class Schemas:
         return extends
 
 
-    def get(self,name):
+    def get(self, name):
         """return an complete schema w/ all extends included"""
         ext = self.get_extends(name)
         res = self.load(name)
@@ -133,22 +132,22 @@ class DeviceBuilder:
         self.schemas = Schemas()
         self.basic = self.schemas.get('basic.basic')
 
-    def is_basic_method(self,value):
+    def is_basic_method(self, value):
         return value in self.basic['methods']
 
-    def is_basic_attribute(self,value):
+    def is_basic_attribute(self, value):
         return value in self.basic['attributes']
 
-    def is_basic_notification(self,value):
+    def is_basic_notification(self, value):
         return value in self.basic['notifications']
 
-    def is_basic_datamodel(self,value):
+    def is_basic_datamodel(self, value):
         return value in self.basic['datamodel']
 
-    def get_schema(self,name):
+    def get_schema(self, name):
         return self.schemas.get(name)
 
-    def build(self,name,template):
+    def build(self, name, template):
         data = self.schemas.get(name)
         tmpl = Template(filename=template)
 
@@ -183,7 +182,7 @@ class DeviceBuilder:
         print(tmpl.render(**args))
         #return args
 
-    def build_all(self,template):
+    def build_all(self, template):
         devs = self.schemas.get_devtypes()
         for k in devs:
             self.build(k,template)