diff -u pyparsing-2.2.0.bak/pyparsing.py pyparsing-2.2.0/pyparsing.py
--- pyparsing-2.2.0.bak/pyparsing.py	2019-10-11 11:27:35.000000000 -0400
+++ pyparsing-2.2.0/pyparsing.py	2019-10-11 11:28:12.000000000 -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