diff --git a/src/pystencils_autodiff/backends/_pytorch.py b/src/pystencils_autodiff/backends/_pytorch.py
index 6d2da60f799483a5dbc62f0266d6d331ee750cb6..22242763a6830c571af6d155faf6c2f76e29e598 100644
--- a/src/pystencils_autodiff/backends/_pytorch.py
+++ b/src/pystencils_autodiff/backends/_pytorch.py
@@ -100,7 +100,9 @@ def tensor_to_gpuarray(tensor):
         raise ValueError(
             'Cannot convert CPU tensor to GPUArray (call `cuda()` on it)')
     else:
-        return pycuda.gpuarray.GPUArray(tensor.shape, dtype=torch_dtype_to_numpy(tensor.dtype), gpudata=tensor.data_ptr())
+        return pycuda.gpuarray.GPUArray(tensor.shape,
+                                        dtype=torch_dtype_to_numpy(tensor.dtype),
+                                        gpudata=tensor.data_ptr())
 
 
 def gpuarray_to_tensor(gpuarray, context=None):
diff --git a/src/pystencils_autodiff/backends/_tensorflow_cpp.py b/src/pystencils_autodiff/backends/_tensorflow_cpp.py
index 541e1225c61eefd0ee095c035dbcf59d4b51598f..d64f1765bc4756e84ddaa5da0cf2eb5cac7ea7bf 100644
--- a/src/pystencils_autodiff/backends/_tensorflow_cpp.py
+++ b/src/pystencils_autodiff/backends/_tensorflow_cpp.py
@@ -6,7 +6,8 @@ Advantages:
 - Custom Ops will be serializable
 
 Disadavantages:
-- C++ Code has to be build with correct parameters and ABI for present Tensorflow version (best integrated into Tensorflow build)
+- C++ Code has to be build with correct parameters and ABI
+for present Tensorflow version (best integrated into Tensorflow build)
 
 """
 
diff --git a/src/pystencils_autodiff/lbm/__init__.py b/src/pystencils_autodiff/lbm/__init__.py
index b0579476c1af869e4c25cc3b9582c623bb2b4115..a28beebcc67532ac1db816dfc49497edd4a0e301 100644
--- a/src/pystencils_autodiff/lbm/__init__.py
+++ b/src/pystencils_autodiff/lbm/__init__.py
@@ -1,2 +1,4 @@
 from lbmpy.autodiff._autodiff_lbstep import AutoDiffLatticeBoltzmannStep
 from lbmpy.autodiff.adjoint_boundaryconditions import AdjointBoundaryCondition
+
+__all__ = ['AutoDiffLatticeBoltzmannStep', 'AdjointBoundaryCondition']
diff --git a/src/pystencils_autodiff/tensorflow.py b/src/pystencils_autodiff/tensorflow.py
index 82a86cca85713dbee6ef2d9c8336a647aa99634c..91a8c76436ec4fd100b8bb72016d6e05832cef5f 100644
--- a/src/pystencils_autodiff/tensorflow.py
+++ b/src/pystencils_autodiff/tensorflow.py
@@ -24,5 +24,3 @@ def tf_variable_from_field(field, init_val=0, constraint=None):
 
 def tf_placeholder_from_field(field):
     return tf.placeholder(dtype=field.dtype.numpy_dtype, name=field.name + '_placeholder', shape=field.shape)
-
-