modified flowgraph cleanup

2 files changed, 9 insertions, 9 deletions

diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py b/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
index 5abbaf9eb..6daa4e7a2 100644
--- a/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/generic_usrp.py
@@ -122,10 +122,13 @@ class _generic_usrp_base(object):
         if self._type == USRP1_TYPE: return self._subdev.set_auto_tr(enable)
 
     def __del__(self):
-        try: # Avoid weak reference error
-            del self._u
+        #delete usrp1 specific subdev
+        if self._type == USRP1_TYPE:
             del self._subdev
-        except: pass
+            self._subdev = None
+        #delete the usrp device
+        del self._u
+        self._u = None
 
 ########################################################################
 # generic usrp source
diff --git a/gr-utils/src/python/usrp_siggen.py b/gr-utils/src/python/usrp_siggen.py
index 8ee8cfd2a..69925fd0e 100755
--- a/gr-utils/src/python/usrp_siggen.py
+++ b/gr-utils/src/python/usrp_siggen.py
@@ -318,9 +318,6 @@ if __name__ == "__main__":
         print e
         sys.exit(1)
 
-    # Run it
-    try:
-        tb.run()
-
-    except KeyboardInterrupt:
-        pass
+    tb.start()
+    raw_input('Press Enter to quit: ')
+    tb.stop()