diff --git a/dot_parser.py b/dot_parser.py
index dedd61a..78d2a16 100644
--- a/dot_parser.py
+++ b/dot_parser.py
@@ -22,10 +22,10 @@ import codecs
 
 from pyparsing import __version__ as pyparsing_version
 
-from pyparsing import ( nestedExpr, Literal, CaselessLiteral, Word, Upcase, OneOrMore, ZeroOrMore,
+from pyparsing import ( nestedExpr, Literal, CaselessLiteral, Word, OneOrMore, ZeroOrMore,
     Forward, NotAny, delimitedList, oneOf, Group, Optional, Combine, alphas, nums,
     restOfLine, cStyleComment, nums, alphanums, printables, empty, quotedString,
-    ParseException, ParseResults, CharsNotIn, _noncomma, dblQuotedString, QuotedString, ParserElement )
+    ParseException, ParseResults, CharsNotIn, dblQuotedString, QuotedString, ParserElement )
 
 
 class P_AttrList: