L2SS-731: Add an easier usable variant to Pointing_direction_R

tangostationcontrol/tangostationcontrol/devices/tilebeam.py

@@ -63,6 +63,11 @@ class TileBeam(beam_device):
         dtype=((numpy.str,),), max_dim_x=3, max_dim_y=96,
         fget=lambda self: self._pointing_direction_rw)
 
+    Pointing_direction_str_R = attribute(access=AttrWriteType.READ,
+        doc='Pointing direction as a formatted string',
+        dtype=(numpy.str,), max_dim_x=96,
+        fget=lambda self:  ["{0} ({1}, {2})".format(*x) for x in self._pointing_direction_r])
+
     Pointing_timestamp_R = attribute(access=AttrWriteType.READ,
         dtype=(numpy.double,), max_dim_x=96,
         fget=lambda self: self._pointing_timestamp_r)