Rip out all the u"..." literals and calls to unicode().
diff --git a/Lib/cookielib.py b/Lib/cookielib.py
index 7fd883f..7c794d4 100644
--- a/Lib/cookielib.py
+++ b/Lib/cookielib.py
@@ -644,7 +644,7 @@
     # And here, kind of: draft-fielding-uri-rfc2396bis-03
     # (And in draft IRI specification: draft-duerst-iri-05)
     # (And here, for new URI schemes: RFC 2718)
-    if isinstance(path, unicode):
+    if isinstance(path, str):
         path = path.encode("utf-8")
     path = urllib.quote(path, HTTP_PATH_SAFE)
     path = ESCAPED_CHAR_RE.sub(uppercase_escaped_char, path)