diff --git a/pygimli/physics/ert/__init__.py b/pygimli/physics/ert/__init__.py
index 13d33434b..3994ca1fd 100644
--- a/pygimli/physics/ert/__init__.py
+++ b/pygimli/physics/ert/__init__.py
@@ -47,4 +47,5 @@ def createERTData(*args, **kwargs):
 # Module prototypes
 DataContainer = pg.core.DataContainerERT
 Manager = ERTManager
+Modelling = ERTModelling
 coverageERT = pg.core.coverageDCtrans
diff --git a/pygimli/physics/ert/ertModelling.py b/pygimli/physics/ert/ertModelling.py
index 09b03c7d9..b365f185c 100644
--- a/pygimli/physics/ert/ertModelling.py
+++ b/pygimli/physics/ert/ertModelling.py
@@ -85,7 +85,7 @@ class ERTModelling(ERTModellingBase):
     """
 
     def __init__(self, sr=True, verbose=False):
-        super(ERTModelling, self).__init__()
+        super().__init__()
 
         # don't use DC*fop or its regionmanager directly
         #
@@ -176,7 +176,7 @@ def response(self, mod):
             mod = self.flipImagPart(mod)
 
         resp = self._core.response(mod)
-        
+
         if self.complex() and self._conjImag:
             pg.warn('backflip imaginary part after response calc')
             resp = self.flipImagPart(resp)