Maximum recursion depth exceeded

GNU Radio
1

Dear all,

An runtime error came out when I run my python prgram:
File “/home/john/gnuradio/gr-iono/usrp_source_c.py”, line 16, in
init
gr.io_signature(1,1,gr.sizeof_gr_complex)) #output signiture
File
“/usr/local/lib/python2.5/site-packages/gnuradio/gr/hier_block2.py”,
line 42, in init
self._hb = hier_block2_swig(name, input_signature, output_signature)
RuntimeError: maximum recursion depth exceeded

I google this error, but didn’t find any solution on this. How can this
error be corrected?

Thanks for help.

Yan

2

On Tue, Jun 01, 2010 at 09:39:47AM -0700, Johnathan C. wrote:

This can happen if you create a hierarchical block in Python, but
forget to call the parent Python class init function in your own
init function, or if the arguments to the parent Python class
init function are malformed.

Johnathan

Also, what version of GNU Radio are you using?
(I seem to remember we made a change that produced a more informative
message in this case.)

Eric

3

On Tue, Jun 1, 2010 at 07:52, Yan N. [email protected] wrote:

An runtime error came out when I run my python prgram:
File “/home/john/gnuradio/gr-iono/usrp_source_c.py”, line 16, in init
gr.io_signature(1,1,gr.sizeof_gr_complex)) #output signiture
File “/usr/local/lib/python2.5/site-packages/gnuradio/gr/hier_block2.py”,
line 42, in init
self._hb = hier_block2_swig(name, input_signature, output_signature)
RuntimeError: maximum recursion depth exceeded

This can happen if you create a hierarchical block in Python, but
forget to call the parent Python class init function in your own
init function, or if the arguments to the parent Python class
init function are malformed.

Johnathan

4

Also, what version of GNU Radio are you using?
(I seem to remember we made a change that produced a more informative
message in this case.)

Eric

Thank you so much for the reply. I’m using GNU Radio 3.2 svn.

I’ve another question related to the received data. I’m trying to
capture the signal just after tunning back to baseband by using
file_sink_c(gr.sizeof_gr_complex,filename) and reading data in octave.
Here is a portion of the data I captured:
0 - 2i
6 + 9i
-33 - 52i
83 + 144i
-189 - 331i
368 + 663i
-694 - 1258i
1365 + 2435i
-4062 - 6523i
1164 - 1570i
-1669 + 550i
-1177 - 2948i
605 + 1495i
-320 - 797i
159 + 403i
-70 - 186i
25 + 70i
-6 - 18i
0 + 0i
0 + 0i
0 - 1i
0 + 0i
0 - 1i
0 - 1i
0 + 0i
0 - 1i
0 + 0i
-1 + 0i
0 + 0i
-1 + 0i
0 + 0i
0 + 0i
-1 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
-1 + 0i
0 + 0i
-1 - 1i
I got an info on dealing with the received data, the firest 20 or so
samples is an artifact of the USRP due to the first time enable, which
can be ignored. However, How can I figure out how many samples can be
ignored in my case? Where can be starting sample to collect the data to
do analysis?

Thanks for help.

Regards,
Yan