diff --git a/pathways/kernel.py b/pathways/kernel.py
index d25555ad083cac27343557f6a7ef24d4e2cd1dfa..52d568374bf903896a19e4b55cc923845a0bf9cc 100644
--- a/pathways/kernel.py
+++ b/pathways/kernel.py
@@ -12,13 +12,12 @@
 
 import numpy as np
 from numpy.matlib import repmat
-import subprocess
-from igraph.datatypes import Matrix
+# import subprocess
+# from igraph.datatypes import Matrix
 from scipy.sparse import csc_matrix,lil_matrix,issparse
-from scipy.sparse import linalg
+# from scipy.sparse import linalg
 from scipy.linalg import inv,eigh,solve
-import dask
-import dask.array as da
+
 
 
 __author__ = "Monica Ticlla"
@@ -199,12 +198,6 @@ def expm_solveq(A):
     D, V = eigh(A)
     return solve(V.T, (np.exp(D) * V).T).T
 
-#def expm_solveq_dask(A):
-#    D, V = eigh(A)
-#
-#    return da.linalg.solve()
-
-
 
 def ed(A,alpha=0.1):
     """Computes the exponential diffusion kernel (ed).
diff --git a/pathways/pathways_relevance.py b/pathways/pathways_relevance.py
index a3a19053f179080602247ba101b424ae169f8fa7..85ba75ee10da5bc1c9cd3cfd810e839798484214 100644
--- a/pathways/pathways_relevance.py
+++ b/pathways/pathways_relevance.py
@@ -10,7 +10,7 @@
 
 """
 
-from igraph import Graph
+# from igraph import Graph
 import numpy as np
 import pandas as pd
 import random