Test extras_require.

requirements.txt

@@ -5,8 +5,8 @@ networkx>=2.2
 scikit-learn>=0.20.0
 tabulate>=0.8.2
 tqdm>=4.26.0
-control>=0.8.2; matplotlib>=3.1.0 # for generalized random walk kernels only.
-control<0.8.2; matplotlib<3.1.0
+# control>=0.8.2; matplotlib>=3.1.0 # for generalized random walk kernels only.
+# control<0.8.2; matplotlib<3.1.0
 cvxpy>=1.0.31 # for preimage. Does not work for "pip install graphkit-learn".
 # -e https://files.pythonhosted.org/packages/11/d0/d900870dc2d02ea74961b90c353666c6528a33ea61a10aa59a0d5574ae59/cvxpy-1.0.31.tar.gz # for preimage.
 cvxopt>=1.2.5 # for preimage.

requirements_pypi.txt

@@ -5,8 +5,8 @@ networkx>=2.2
 scikit-learn>=0.20.0
 tabulate>=0.8.2
 tqdm>=4.26.0
-control>=0.8.2; matplotlib>=3.1.0 # for generalized random walk kernels only.
-control<0.8.2; matplotlib<3.1.0
+# control>=0.8.2; matplotlib>=3.1.0 # for generalized random walk kernels only.
+# control<0.8.2; matplotlib<3.1.0
 # cvxpy>=1.0.31 # for preimage. Does not work for "pip install graphkit-learn".
 # -e https://files.pythonhosted.org/packages/11/d0/d900870dc2d02ea74961b90c353666c6528a33ea61a10aa59a0d5574ae59/cvxpy-1.0.31.tar.gz # for preimage.
 cvxopt>=1.2.5 # for preimage.

setup.py

@@ -8,7 +8,7 @@ with open('requirements_pypi.txt') as fp:
 
 setuptools.setup(
     name="graphkit-learn",
-    version="0.2b2",
+    version="0.2b3",
     author="Linlin Jia",
     author_email="linlin.jia@insa-rouen.fr",
     description="A Python library for graph kernels, graph edit distances, and graph pre-images",
@@ -22,4 +22,8 @@ setuptools.setup(
         "Operating System :: OS Independent",
     ],
     install_requires=install_requires,
+	extras_require={
+        'control>=0.8.2': ['matplotlib>=3.1.0'], # for generalized random walk kernels only.
+		'control<0.8.2': ['matplotlib<3.1.0']
+		},
 )