uhd: make a tune_request_t that inherits from float for GRC, added docs

1 files changed, 12 insertions, 0 deletions

diff --git a/gr-uhd/swig/__init__.py b/gr-uhd/swig/__init__.py
index 2fed17e57..0fdacb796 100644
--- a/gr-uhd/swig/__init__.py
+++ b/gr-uhd/swig/__init__.py
@@ -21,8 +21,20 @@
 
 # The presence of this file turns this directory into a Python package
 
+########################################################################
 # Add SWIG generated code to this namespace
+########################################################################
 from uhd_swig import *
 
+########################################################################
 # Add other content from pure-Python modules here
+########################################################################
 
+class tune_request_t(tune_request_t, float):
+    """
+    Make the python tune request object inherit from float
+    so that it can be passed in GRC as a frequency parameter.
+    The type checking in GRC will accept the tune request.
+    """
+    def __new__(self, *args): return float.__new__(self)
+    def __float__(self): return self.target_freq