diff --git a/README.md b/README.md
index b8cb80f9cf61075bc510ed8099310b2e33f50179..acf6750d6078541501f253938b8681c7eed1dcd4 100644
--- a/README.md
+++ b/README.md
@@ -11,17 +11,14 @@ Gmatch4py is a library dedicated to graph matching. Graph structure are stored i
  
 ## Installation
 
-First, compile the library by running this command:
+To install `GMatch4py`, run the following commands:
 
 ```
-$ python3 setup.py build_ext
+$ git clone https://github.com/Jacobe2169/GMatch4py.git
+$ cd GMatch4py
+$ python3 setup.py install
 ```
 
-Then, install the compiled module with:
-
-```
-$ pip3 install .
-```
 
 ## Get Started
 
@@ -75,8 +72,8 @@ each code is associated with a reference to the original.**
 
   * Debug algorithms with --> (*debug needed*)
   * Improve code structure and performance
-  * Simplify `setup.py`
+  * Simplify `setup.py` :heavy_check_mark:
   * Some algorithms are distance and others are similarity measure. Must change the compare
   methods so it can adapt to the user need. For example, maybe the user want to deal with 
-  graph similarity rather than distance between graph.
-  * Write the documentation
\ No newline at end of file
+  graph similarity rather than distance between graph.:heavy_check_mark:
+  * Write the documentation :see_no_evil:
\ No newline at end of file
diff --git a/gmatch4py/ged/graph_edit_dist.pyx b/gmatch4py/ged/graph_edit_dist.pyx
index db351d4abffafebd1699fd916895793161a9c1d2..f2a39c34e81716bf05e8b4fedbd1578cb25c944a 100644
--- a/gmatch4py/ged/graph_edit_dist.pyx
+++ b/gmatch4py/ged/graph_edit_dist.pyx
@@ -26,9 +26,10 @@ cdef class GraphEditDistance(AbstractGraphEditDistance):
             R2 = nx.create_empty_copy(H)
             R2.add_edges_from(H.edges(node2,data=True))
 
-            return abs(R2.number_of_edges()-intersection(R,R2).number_of_edges())
+            diff=abs(R2.number_of_edges()-intersection(R,R2).number_of_edges())
+            return (diff*self.edge_ins)+(diff*self.edge_del)
         else:
-            return self.node_ins+self.node_del
+            return 0.
 
     cdef double delete_cost(self, int i, int j, nodesG, G):
         if i == j:
diff --git a/gmatch4py/kernels/weisfeiler_lehman.pyx b/gmatch4py/kernels/weisfeiler_lehman.pyx
index dd0a1d3feade50cf2ca3c6377dd2eaeb8935cb10..95fb085cff463d989469b0eca906d647657c337e 100644
--- a/gmatch4py/kernels/weisfeiler_lehman.pyx
+++ b/gmatch4py/kernels/weisfeiler_lehman.pyx
@@ -17,12 +17,18 @@ import copy
 import networkx as nx
 import numpy as np
 cimport numpy as np
+from ..base cimport Base
 
+cdef class WeisfeleirLehmanKernel(Base):
 
-class WeisfeleirLehmanKernel(object):
-    __type__ = "sim"
-    @staticmethod
-    def compare(graph_list,selected,h=2):
+    cdef int h
+
+    def __init__(self,h=2):
+        Base.__init__(self,0,True)
+        self.h=h
+
+
+    cpdef np.ndarray compare(self,list graph_list, list selected):
         """Compute the all-pairs kernel values for a list of graphs.
         This function can be used to directly compute the kernel
         matrix for a list of graphs. The direct computation of the
@@ -103,7 +109,7 @@ class WeisfeleirLehmanKernel(object):
 
         new_labels = copy.deepcopy(labels) # Can't work without it !!!
 
-        while it < h:
+        while it < self.h:
             # create an empty lookup table
             label_lookup = {}
             label_counter = 0
diff --git a/setup.py b/setup.py
index a9d67f2ba1e43b5298f3a81d9e9a39743388e733..634b12b08f3062cf563b5bb28828cbe8d3dcba8a 100644
--- a/setup.py
+++ b/setup.py
@@ -9,6 +9,8 @@ except:
     print("You don't seem to have Cython installed. Please get a")
     print("copy from www.cython.org and install it")
     sys.exit(1)
+
+
 def scandir(dir, files=[]):
     for file in os.listdir(dir):
         path = os.path.join(dir, file)
@@ -18,7 +20,6 @@ def scandir(dir, files=[]):
             scandir(path, files)
     return files
 
-
 # generate an Extension object from its dotted name
 def makeExtension(extName):
     extPath = extName.replace(".", os.path.sep)+".pyx"
@@ -34,12 +35,9 @@ extNames = scandir("gmatch4py")
 extensions = cythonize([makeExtension(name) for name in extNames])
 
 setup(
-    name="Gmatch4py",
+    name="GMatch4py",
     description="A module for graph matching",
-    packages=["gmatch4py"],
-    #ext_modules=cythonize([
-     #   Extension("*", ["gmatch4py/*.pyx"],include_dirs=[np.get_include()])
-    #]),
+    packages=["gmatch4py","gmatch4py.ged","gmatch4py.kernels"],
     ext_modules=extensions,
     cmdclass={'build_ext': build_ext},
     setup_requires=["numpy","networkx"],
@@ -47,7 +45,7 @@ setup(
     version="0.1"
 )
 #Clean cpp and compiled file
-f=False
+f=True
 if f:
     if os.path.exists("build"):
         shutil.rmtree("build")