Nevermind. Problem was in my code creating the np.array over on the send side. Sorry to waste the bandwidth.
-- Tom, N5EG On Mon, Jan 1, 2018 at 1:23 PM, Tom McDermott <tom.n...@gmail.com> wrote: > > Hello, Happy New Year ! > > I am trying to use message passing in gnuradio maint branch, 3.7.11.1 > (python 2.7 based) > > When just bringing up a command line window, starting python 2.7, > importing gnuradio, numpy and pmt, > the behavior I get (which agrees with the documentation): > > n = np.array([1,2,3,4,5], dtype=uint8) > p = pmt.to_pmt(n) > r = pmt.to_python(p) > > printing the types of a, p, and r yield the expected... > > type(n) --> <type 'numpy.ndarray'> > type(p) --> <class 'pmt.pmt_swig.swig_int_ptr'> > type(r) --> <type 'numpy.ndarray'> > > > > However when in gnuradio > create and pass the pmt via the message port, > I get a string type after converting to python: > > > def handle_rxmsg(self, msg): > dat = pmt.to_python(msg) # dat is an np.array[9] of type np.uint8 > print "Type of msg: ", type(msg) > print "Type of dat: ", type(dat) > > > This prints on the gnuradio console: > > Type of msg: <class 'pmt.pmt_swig.swig_int_ptr'> > Type of dat: <type 'str'> > > > Does anyone know how do I get back a numpy array from pmt while > running under gnuradio? > > Why does this work in a command line console, but not in gnuradio? > > > -- Tom, N5EG > > > >
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