discuss-gnuradio
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] Problem loading Python block


From: Nemanja Savic
Subject: Re: [Discuss-gnuradio] Problem loading Python block
Date: Tue, 29 Jan 2013 13:00:03 +0100

Guys,

i am not able to load gr.basic_block and make signal processing block in Python. Simplu, there is no binding within gnuradio/gr for that class.
It works perfectly for gr.hier)block2 class.
What might be the problem?

Thanks


On Tue, Jan 29, 2013 at 12:57 PM, Nemanja Savic <address@hidden> wrote:
Hi Martin,

here is the error I got when trying to use new version of gr_modtool:

address@hidden Desktop]$ gr_modtool.py help

Using Python < 2.7 possibly buggy. Ahem. Please send all complaints to /dev/null.
Traceback (most recent call last):
  File "/usr/local/bin/gr_modtool.py", line 2665, in <module>
    main()
  File "/usr/local/bin/gr_modtool.py", line 2656, in main
    modtool = cmd_dict[command]()
  File "/usr/local/bin/gr_modtool.py", line 2629, in __init__
    ModTool.__init__(self)
  File "/usr/local/bin/gr_modtool.py", line 282, in __init__
    self.parser = self.setup_parser()
  File "/usr/local/bin/gr_modtool.py", line 290, in setup_parser
    parser = OptionParser(usage=Templates['usage'], add_help_option=False)
NameError: global name 'Templates' is not defined



On Mon, Jan 28, 2013 at 10:14 PM, Nemanja Savic <address@hidden> wrote:
Hi all,

In my first post from today, where I reported error in gr_modtool, I was using script downloaded from github this morning (just to clarifu how old scriot I used).
Basically I am trying to make my own packet deframer block, and they are more or less designed like that. This block was designed just to see how messages work. In GRC when I connect them in that way it works, but in test script above it doesn't work.
Basically the problem comes from making similar block like packet deframer, but I am not able to import gr.block, or gr.basic_block in python (and gr.hier_block2 works perfectly)

Cheers


On Mon, Jan 28, 2013 at 5:05 PM, Martin Braun (CEL) <address@hidden> wrote:
- Try the latest gr_modtool from github
- What you're doing seems weird--why are you connecting message blocks?
  These are meant as a hackish solution to access samples from outside
  the flow graph. Perhaps you want the new PDU to stream blocks?

MB

On Mon, Jan 28, 2013 at 04:42:04PM +0100, Nemanja Savic wrote:
> Since I don't know why gr_modtool doesn't work for me, I took the older working
> version and made very simple hier block in order to understand messages flow in
> gnuradio.
>
> The block code is following:
>
>
>     from gnuradio import gr
>
>     class msg_proba(gr.hier_block2):
>         def __init__(self, ):
>             gr.hier_block2.__init__(self, "msg_proba",
>                     gr.io_signature(1, 1, gr.sizeof_char),  # Input signature
>                     gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
>
>             gr_message_sink_0_msgq_out = gr_message_source_0_msgq_in =
>     gr.msg_queue(4)
>
>             self.gr_message_source_0 = gr.message_source(gr.sizeof_char*1,
>     gr_message_source_0_msgq_in)
>             self.gr_message_sink_0 = gr.message_sink(gr.sizeof_char*1,
>     gr_message_sink_0_msgq_out, False)
>
>             self.connect(self, self.gr_message_sink_0)
>             self.connect(self.gr_message_source_0, self)
>
>
>
> and the test code is following:
>
>
>
>     from gnuradio import gr, gr_unittest
>     import test
>     import msg_proba
>
>     class qa_msg_proba (gr_unittest.TestCase):
>
>         def setUp (self):
>             self.tb = gr.top_block ()
>
>         def tearDown (self):
>             self.tb = None
>
>         def test_001_msg_proba (self):
>        
>             self.src_data = ()
>             self.expected_result = ()
>                    
>             for i in range(51):
>               self.src_data = self.src_data + (1,)
>               self.expected_result = self.expected_result+(1,)
>                      
>             self.src = "" False, 1)
>             self.dst = gr.vector_sink_b ()
>
>             self.msg_pr = msg_proba.msg_proba()
>            
>             self.tb.connect(self.src, self.msg_pr, self.dst)
>                                  
>             self.tb.run ()
>             # check data
>             result_data = dst.data ()
>             self.assertEqual (expected_result, result_data)
>
>     if __name__ == '__main__':
>         gr_unittest.main ()
>
>
> When I run test, it doesn't finish. No errors, just stays active without giving
> any results.
>
> Can somebody provide some explanation?
>
>
>
>
> On Mon, Jan 28, 2013 at 10:28 AM, Nemanja Savic <address@hidden> wrote:
>
>
>     I installed new version of gr_modtool script and it won't work. The error
>     is following:
>
>     address@hidden gr-test]$ gr_modtool.py add -N rx_tx_message -t hier
>     -l python
>     Using Python < 2.7 possibly buggy. Ahem. Please send all complaints to /dev
>     /null.
>     Operating in directory .
>     GNU Radio module name identified: test
>     Language: Python
>     Block/code identifier: rx_tx_message
>     Enter valid argument list, including default arguments:
>     Add Python QA code? [Y/n] n
>     Traversing python...
>     Adding file 'rx_tx_message.py'...
>
>
>     Traceback (most recent call last):
>
>       File "/usr/local/bin/gr_modtool.py", line 3369, in <module>
>         main()
>       File "/usr/local/bin/gr_modtool.py", line 3362, in main
>         modtool.run()
>       File "/usr/local/bin/gr_modtool.py", line 1339, in run
>         self._run_python()
>       File "/usr/local/bin/gr_modtool.py", line 1479, in _run_python
>         self._write_tpl('block_python', 'python', fname_py)
>       File "/usr/local/bin/gr_modtool.py", line 1324, in _write_tpl
>         open(os.path.join(path, fname), 'w').write(get_template(tpl,
>     **self._info))
>       File "/usr/local/bin/gr_modtool.py", line 870, in get_template
>         return str(GRMTemplate(Templates[tpl_id], searchList=kwargs))
>       File "/usr/local/bin/gr_modtool.py", line 865, in __init__
>         Cheetah.Template.Template.__init__(self, src, searchList=searchList)
>       File "/usr/lib64/python2.6/site-packages/Cheetah/Template.py", line 1257,
>     in __init__
>         self._compile(source, file, compilerSettings=compilerSettings)
>       File "/usr/lib64/python2.6/site-packages/Cheetah/Template.py", line 1551,
>     in _compile
>         keepRefToGeneratedCode=True)
>       File "/usr/lib64/python2.6/site-packages/Cheetah/Template.py", line 795,
>     in compile
>         raise parseError
>     Cheetah.Parser.ParseError:
>
>     Error in the Python code which Cheetah generated for this template:
>     ===========================================================================
>     =====
>
>     expected an indented block (DynamicallyCompiledCheetahTemplate.py, line
>     122)
>
>     Line|Python Code
>     ----|-------------------------------------------------------------
>     120 |            deciminterp = ''
>     121 |        else: # generated from line 42, col 1
>     122 |        write(u'''from gnuradio import gr
>                     ^
>     123 |class ''')
>     124 |        _v = VFFSL(SL,"blockname",True) # u'${blockname}' on line 46,
>     col 7
>     125 |        if _v is not None: write(_filter(_v, rawExpr=u'${blockname}'))
>     # from line 46, col 7.
>
>     ===========================================================================
>     =====
>
>     Here is the corresponding Cheetah code.
>     ** I had to guess the line & column numbers, so they are probably
>     incorrect:
>
>     Line 42, column 1
>
>     Line|Cheetah Code
>     ----|-------------------------------------------------------------
>     39  |#else if $blocktype == 'decimator'
>     40  |#set $deciminterp = ', <+decimation+>'
>     41  |#set $deciminterp = ''
>     42  |#else
>          ^
>     43  |#end if
>     44  |from gnuradio import gr
>     45  |
>
>
>     Any suggestions how to ovecome this except using older version which worked
>     perfectly?
>
>
>
>     On Fri, Jan 25, 2013 at 9:22 PM, Nemanja Savic <address@hidden> wrote:
>
>
>         Thank you Martin, I will try that on Monday.
>
>         I suppose that I have older version of gr_modtool, cause there is no
>         option -l for selecting language.
>
>         My weekend would be maybe perfect If you or anybody else can explain to
>         me why my code won't work, cause I  have more or less copied block
>         structure from grextras.
>
>
>         Nice weekend
>
>         Nemanja
>
>
>
>         On Fri, Jan 25, 2013 at 5:18 PM, Martin Braun (CEL) <
>         address@hidden> wrote:
>
>             For a hier block in Python, do
>
>             $ gr_modtool.py add -t hier -l python
>
>             You need 3.6.3 to do that.
>
>             Also, you'll need a new version of modtool (it usually lags a bit
>             behind
>             changes in GNU Radio).
>
>             MB
>
>
>
>             On Fri, Jan 25, 2013 at 05:05:56PM +0100, Nemanja Savic wrote:
>             > Hi all,
>             >
>             >
>             > today i was trying to make hierarchical signal processing block
>             in Python. I
>             > started with gr_modtool script, and configured it for hierpython
>             block type.
>             >
>             >
>             > My idea was to design block similar to packet framer, so inside
>             of the new
>             > block, I connected binary slicer and Framer sink. I have also
>             declared message
>             > queue.
>             >
>             >
>             > Outside of main block, I designed another block which should
>             collect messages
>             > sent by framer from the main block.
>             >
>             >
>             > When I wanted to run this block, I got following error:
>             >
>             >
>             >
>             > Traceback (most recent call last):
>             >   File "/home/savi_ne/work/gnuradio/GRC/top_block.py", line 439,
>             in <module>
>             >     tb = top_block()
>             >   File "/home/savi_ne/work/gnuradio/GRC/top_block.py", line 183,
>             in __init__
>             >     self.test_packet_proba_0 = test.packet_proba()
>             > AttributeError: 'module' object has no attribute 'packet_proba'
>             >
>             >
>             >
>             > Next I found that maybe I have to put following line in
>             __init__.py file:
>             >
>             > from packet_proba import *
>             >
>             >
>             > After that I got similar error:
>             >
>             > Traceback (most recent call last):
>             >   File "/home/savi_ne/work/gnuradio/GRC/top_block.py", line 18,
>             in <module>
>             >     import test
>             >   File "/usr/local/lib64/python2.6/site-packages/test/
>             __init__.py", line 49, in
>             > <module>
>             >     from packet_proba import *
>             >   File "/usr/local/lib64/python2.6/site-packages/test/
>             packet_proba.py", line
>             > 51, in <module>
>             >     class proba(gr.basic_block):
>             > AttributeError: 'module' object has no attribute 'basic_block'
>             >
>             >
>             > I have also tried with gr.block instead of gr.basic_block, but
>             with identical
>             > results.
>             >
>             >
>             > Can anybody tell what's missing?
>             >
>             >
>             > Thanks
>             >
>             >
>             > --
>             > Nemanja Savić
>             >
>
>
>             > _______________________________________________
>             > Discuss-gnuradio mailing list
>             > address@hidden
>             > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>             --
>             Karlsruhe Institute of Technology (KIT)
>             Communications Engineering Lab (CEL)
>
>             Dipl.-Ing. Martin Braun
>             Research Associate
>
>             Kaiserstraße 12
>             Building 05.01
>             76131 Karlsruhe
>
>             Phone: +49 721 608-43790
>             Fax: +49 721 608-46071
>             www.cel.kit.edu
>
>             KIT -- University of the State of Baden-Württemberg and
>             National Laboratory of the Helmholtz Association
>
>             _______________________________________________
>             Discuss-gnuradio mailing list
>             address@hidden
>             https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
>
>
>         --
>
>         Nemanja Savić
>
>
>
>
>     --
>     Nemanja Savić
>
>
>
>
> --
> Nemanja Savić
>

> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio


--
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstraße 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071
www.cel.kit.edu

KIT -- University of the State of Baden-Württemberg and
National Laboratory of the Helmholtz Association

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio




--
Nemanja Savić



--
Nemanja Savić



--
Nemanja Savić

reply via email to

[Prev in Thread] Current Thread [Next in Thread]