Update Travis-CI scripts to include examples; fix bug in runTests if postParse function returns None (or any non-str value)

1 files changed, 3 insertions, 1 deletions

diff --git a/pyparsing.py b/pyparsing.py
index 975846c..89c48d9 100644
--- a/pyparsing.py
+++ b/pyparsing.py
@@ -2454,7 +2454,9 @@ class ParserElement(object):
                 success = success and not failureTests
                 if postParse is not None:
                     try:
-                        out.append(postParse(t, result))
+                        pp_value = postParse(t, result)
+                        if pp_value is not None:
+                            out.append(str(pp_value))
                     except Exception as e:
                         out.append("{} failed: {}: {}".format(postParse.__name__, type(e).__name__, e))
             except ParseBaseException as pe: