Tom,
>>I am trying to use the Constellation Receiver Block and one of the
Parameters is "Constellation Object". Is this a pointer to an object and
>>how/what creates this object? I have looked at the qam.py file but
don't follow how this relates to placing a block down in gnuradio
>>companion.
In GRC u can use
1) from gnuradio import digital (Using Import block)
2) my_const_obj = digital.constellation_qpsk() (Using variable block). To see other options for creating the constellation object see
http://gnuradio.org/doc/doxygen/classgr_1_1digital_1_1constellation.html