a little more debugging, starting on the next layer

py25/bacpypes/apdu.py

@@ -681,6 +681,10 @@ class APCISequence(APCI, Sequence):
         # pass the taglist to the Sequence for additional decoding
         Sequence.decode(self, self._tag_list)
 
+        # trailing unmatched tags
+        if self._tag_list:
+            if _debug: APCISequence._debug("    - trailing unmatched tags")
+
     def apdu_contents(self, use_dict=None, as_class=dict):
         """Return the contents of an object as a dict."""
         if _debug: APCISequence._debug("apdu_contents use_dict=%r as_class=%r", use_dict, as_class)

py25/bacpypes/constructeddata.py

@@ -28,6 +28,17 @@ class Element:
         self.context = context
         self.optional = optional
 
+    def __repr__(self):
+        desc = "%s(%s" % (self.__class__.__name__, self.name)
+        desc += " " + self.klass.__name__
+        if self.context is not None:
+            desc += ", context=%r" % (self.context,)
+        if self.optional:
+            desc += ", optional"
+        desc += ")"
+
+        return '<' + desc + ' instance at 0x%08x' % (id(self),) + '>'
+
 #
 #   Sequence
 #