Get filter from the future

setuptools/compat.py

@@ -29,6 +29,8 @@ if PY2:
     from urllib2 import urlopen, HTTPError, URLError, unquote, splituser
     from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
     filterfalse = itertools.ifilterfalse
+    filter = itertools.ifilter
+    map = itertools.imap
 
     exec("""def reraise(tp, value, tb=None):
     raise tp, value, tb""")
@@ -59,6 +61,8 @@ if PY3:
         urlunsplit, splittag,
     )
     filterfalse = itertools.filterfalse
+    filter = filter
+    map = map
 
     def reraise(tp, value, tb=None):
         if value.__traceback__ is not tb:

setuptools/package_index.py

@@ -20,7 +20,7 @@ from setuptools.compat import (urllib2, httplib, StringIO, HTTPError,
                                urlparse, urlunparse, unquote, splituser,
                                url2pathname, name2codepoint,
                                unichr, urljoin, urlsplit, urlunsplit,
-                               ConfigParser)
+                               ConfigParser, filter)
 from setuptools.compat import filterfalse
 from fnmatch import translate
 from setuptools.py26compat import strip_fragment