-data_files = [ ('/etc/nepi', [ 'VERSION', 'COPYING', 'README' ] ) ]
+### requirements - used by pip install
+required_modules = [ ]
+ # we are now using six for a portable code
+required_modules.append('six')
+ # ipaddr in py2 used to be a separate lib
+ # within recent py3, it is now in standard library but named ipaddress
+if PY2:
+ required_modules.append('ipaddr')
+ # this is required regardless of the python version
+required_modules.append('networkx')
+ # refrain from mentioning these ones that are not exactly crucial
+ # and that have additional, non-python, dependencies
+ # that can easily break the whole install
+#required_modules.append('matplotlib')
+#required_modules.append('pygraphviz')