diff -ur pyparsing-2.2.0/pyparsing.py pyparsing-2.2.0.bak/pyparsing.py
--- pyparsing-2.2.0/pyparsing.py	2017-03-05 21:06:06.000000000 -0500
+++ pyparsing-2.2.0.bak/pyparsing.py	2018-05-17 11:25:17.960270391 -0400
@@ -80,7 +80,10 @@
 try:
     from _thread import RLock
 except ImportError:
-    from threading import RLock
+    try:
+        from threading import RLock
+    except ImportError:
+        from dummy_threading import RLock
 
 try:
     from collections import OrderedDict as _OrderedDict