Add support for expr.setParseAction(None) to clear all parse actions

1 files changed, 14 insertions, 0 deletions

diff --git a/unitTests.py b/unitTests.py
index e14016a..4c6c9ab 100644
--- a/unitTests.py
+++ b/unitTests.py
@@ -3009,6 +3009,20 @@ class TrimArityExceptionMaskingTest2(ParseTestCase):
 
         K()
 
+
+class ClearParseActionsTest(ParseTestCase):
+    def runTest(self):
+        import pyparsing as pp
+        ppc = pp.pyparsing_common
+
+        realnum = ppc.real()
+        self.assertEqual(realnum.parseString("3.14159")[0], 3.14159, "failed basic real number parsing")
+
+        # clear parse action that converts to float
+        realnum.setParseAction(None)
+        self.assertEqual(realnum.parseString("3.14159")[0], "3.14159", "failed clearing parse action")
+
+
 class OneOrMoreStopTest(ParseTestCase):
     def runTest(self):
         from pyparsing import (Word, OneOrMore, alphas, Keyword, CaselessKeyword,