No need to import 'base64' module

slapos/libnetworkcache.py

@@ -12,8 +12,6 @@
 #
 ##############################################################################
 
-
-import base64
 import hashlib
 import httplib
 import json
@@ -85,10 +83,8 @@ class NetworkcacheClient(object):
     user = parsed_url.username
     passwd = parsed_url.password
     if user is not None:
-      authentication_string = '%s:%s' % (user, passwd)
-      base64string = base64.encodestring(authentication_string).strip()
       return_dict['header_dict']['Authorization'] = 'Basic %s' %\
-        base64string
+        ('%s:%s' % (user, passwd)).encode('base64').strip()
 
     return_dict['path'] = parsed_url.path
     return_dict['host'] = parsed_url.hostname