[Discuss-gnuradio] Python enabler block not working

[Abdul Samad/TE R&D/NRTC]

Hi

I am trying to make a python block that would act as an enabler between audio 
source and audio sink such that whenever I hit space from my keyboard the 
transmission begins and should stop after re hitting again. For starters I 
tried to start the transmission using just only one space hit but even this 
seems to be failing.I am using python block module from gnuradio. I get the 
following errors on my report panel. The source code of the block and the GRC 
screenshot is also attached.


Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gateway.py", line 55, in 
eval
    try: self._callback()
  File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gateway.py", line 160, in 
__gr_block_handle
    ) for i in self.__out_indexes],
TypeError: in method 'block_gw_message_type_work_args_return_value_set', 
argument 2 of type 'int'
thread[thread-per-block[1]: <block Embedded Python Block (1)>]: SWIG director 
method error. Error detected when calling 'feval_ll.eval'

If anybody figure out the problem or its probable solution please let me know

Regards
Abdul Samad

epy_block_1.py
Description: epy_block_1.py

Screenshot from 2017-11-28 11-12-37.png
Description: Screenshot from 2017-11-28 11-12-37.png