diff --git a/html5lib/_utils.py b/html5lib/_utils.py
index 03f0dab7..91252f2c 100644
--- a/html5lib/_utils.py
+++ b/html5lib/_utils.py
@@ -1,6 +1,5 @@
from __future__ import absolute_import, division, unicode_literals
-import sys
from types import ModuleType
from six import text_type
@@ -13,11 +12,9 @@
__all__ = ["default_etree", "MethodDispatcher", "isSurrogatePair",
"surrogatePairToCodepoint", "moduleFactoryFactory",
- "supports_lone_surrogates", "PY27"]
+ "supports_lone_surrogates"]
-PY27 = sys.version_info[0] == 2 and sys.version_info[1] >= 7
-
# Platforms not supporting lone surrogates (\uD800-\uDFFF) should be
# caught by the below test. In general this would be any platform
# using UTF-16 as its encoding of unicode strings, such as
diff --git a/html5lib/html5parser.py b/html5lib/html5parser.py
index f8309e14..dd8ba6f7 100644
--- a/html5lib/html5parser.py
+++ b/html5lib/html5parser.py
@@ -1,5 +1,5 @@
from __future__ import absolute_import, division, unicode_literals
-from six import with_metaclass, viewkeys, PY3
+from six import with_metaclass, viewkeys
import types
from collections import OrderedDict
@@ -2707,10 +2707,7 @@ def processEndTag(self, token):
def adjust_attributes(token, replacements):
- if PY3 or _utils.PY27:
- needs_adjustment = viewkeys(token['data']) & viewkeys(replacements)
- else:
- needs_adjustment = frozenset(token['data']) & frozenset(replacements)
+ needs_adjustment = viewkeys(token['data']) & viewkeys(replacements)
if needs_adjustment:
token['data'] = OrderedDict((replacements.get(k, k), v)
for k, v in token['data'].items())
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