added continuation mode for pad source and sinks

[debian/gnuradio] / grc / base / Block.py

diff --git a/grc/base/Block.py b/grc/base/Block.py
index 82d27656785609e3b8eb12b7e68a85b2e12f0380..349e71f76b212f322d42a479161735186941cd64 100644 (file)
--- a/grc/base/Block.py
+++ b/grc/base/Block.py
@@ -47,7 +47,9 @@ class TemplateArg(UserDict):
                return self._param.get_evaluated()
 
 def _get_keys(lst): return [elem.get_key() for elem in lst]
-def _get_elem(lst, key): return lst[_get_keys(lst).index(key)]
+def _get_elem(lst, key):
+       try: return lst[_get_keys(lst).index(key)]
+       except ValueError: raise ValueError, 'Key "%s" not found in %s.'%(key, _get_keys(lst))
 
 class Block(Element):