diff --git a/dpt-tools.py b/dpt-tools.py
index 6a479d4..7ba73b7 100644
--- a/dpt-tools.py
+++ b/dpt-tools.py
@@ -65,8 +65,7 @@ def main():
     '''
     main func to initalize dpt object
     '''
-    p = argparse.ArgumentParser(
-        description="DPT Tools")
+    p = argparse.ArgumentParser(description="DPT Tools")
     p.add_argument(
         '--client-id', '-id',
         dest="dpt_id",
diff --git a/python_api/libDPT.py b/python_api/libDPT.py
index 331e94d..30491a7 100644
--- a/python_api/libDPT.py
+++ b/python_api/libDPT.py
@@ -598,14 +598,13 @@ class DPT():
         '''
         return self.authenticate()
 
-
     def authenticate(self, client_id_fp="", key_fp="", testmode=False):
         '''
         authenticate is necessary to send url request
         '''
         # find client_id_fp and key_fp optional
         if not client_id_fp or not key_fp:
-            client_id_fp, key_fp = auto_find_client_key_fps()
+            client_id_fp, key_fp = self.auto_find_client_key_fps()
         if not os.path.isfile(client_id_fp) or not os.path.isfile(key_fp):
             print(
                 "! Err: did not find {0} or {1}"