Merge pull request #41 from radiasoft/issue/29_py3_pkdexc

Fix #29 correct ordering of stacks in py3

pykern/pkdebug.py

@@ -159,12 +159,21 @@ def pkdexc():
     try:
         e = sys.exc_info()
         # py2 doesn't cascade exceptions
-        stack = traceback.format_stack()[:-2]
         if hasattr(traceback, 'TracebackException'):
-            stack += traceback.format_exception(*e)
+            return ''.join(
+                traceback.format_exception(*e) \
+                + ['\nException was printed at:\n\n'] \
+                + traceback.format_exception_only(e[0], e[1]) \
+                + traceback.format_stack()[:-2],
+            )
+
         else:
-            stack +=  traceback.format_tb(e[2])
-        return ''.join(traceback.format_exception_only(e[0], e[1]) + stack)
+            return ''.join(
+                traceback.format_exception_only(e[0], e[1]) \
+                + traceback.format_stack()[:-2] \
+                + traceback.format_tb(e[2]),
+            )
+
     except Exception as e:
         return 'pykern.pkdebug.pkdexc: unable to retrieve exception info'