import setup from distutils.core if setutools package no installed

setup.py

@@ -1,7 +1,10 @@
 #!/usr/bin/env python
 import os
 
-from setuptools import setup
+try:
+    from setuptools import setup
+except ImportError:
+    from distutils.core import setup
 
 
 with open(os.path.join(os.path.dirname(__file__), 'README.rst')) as readme:
@@ -37,4 +40,4 @@ setup(
         'Programming Language :: Python :: Implementation :: CPython',
         'Topic :: Software Development :: Libraries :: Python Modules',
     ],
-)
+)