Creating and importing a new python block

GNU Radio
1

Hello,

I tried to build my first custom block.
Very easy. It just generates one tune msg every 5 seconds.

I followed steps of writing an OOT block in python:

http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules#Tutorial-3-Writing-a-signal-processing-block-in-Python

% gr_modtool super_msg_generator
super_msg_generator % gr_modtool add -t sync -l python generador

Inside python/generador.py my code:

#!/usr/bin/env python
import numpy
from gnuradio import gr
import time
class generador(gr.sync_block):
def init(self):
gr.sync_block.init(self,
name=“generador”
#,in_sig=[],
#,out_sig=[]
)
self.message_port_register_out(pmt.intern(“ppm”))

def work(self):
while True:
    time.sleep(5)
    self.message_port_pub(pmt.intern("ppm"), pmt.to_pmt("freq",

float(915e6)))
time.sleep(5)
self.message_port_pub(pmt.intern(“ppm”), pmt.to_pmt(“freq”,
float(918e6)))

How can I check a block with no inputs and no outputs?

After that I created a build folder in gnuradio/gr-super_msg_generator

cmake …/
make
sudo make install
sudo ldconfig

I thought that was everyhting.

However when trying to setup a python flowgraph the code cannot import
the
new block.

tune_msg.py::
#!/usr/bin/env python
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import uhd
from gnuradio import super_msg_generator
…

output when executing: $ python tune_msg.py
linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.008.001-42-g8c87a524

Traceback (most recent call last):
File “tune_msg.py”, line 12, in
from gnuradio import super_msg_generator
ImportError: cannot import name super_msg_generator

There is something missing but I do not figure it out. Any help please?

Regards,