No unicode in Python3.

but we need it in Python2. The bug was probably introduced
as a result of recent Python code type unteroperability canonicalization

uncompyle6/parsers/parse3.py

@@ -20,6 +20,7 @@ from __future__ import print_function
 from uncompyle6.parser import PythonParser, PythonParserSingle, nop_func
 from uncompyle6.parsers.astnode import AST
 from spark_parser import DEFAULT_DEBUG as PARSER_DEFAULT_DEBUG
+from xdis import PYTHON3
 
 class Python3Parser(PythonParser):
 
@@ -890,7 +891,10 @@ class Python3Parser(PythonParser):
             return not isinstance(tokens[first].attr, tuple)
         elif lhs == 'kwarg':
             arg = tokens[first].attr
-            return not (isinstance(arg, str) or isinstance(arg, unicode))
+            if PYTHON3:
+                return not isinstance(arg, str)
+            else:
+                return not (isinstance(arg, str) or isinstance(arg, unicode))
         elif lhs == 'while1elsestmt':
             # if SETUP_LOOP target spans the else part, then this is
             # not while1else. Also do for whileTrue?