Re: [Discuss-gnuradio] Building an OOT Python block

I think you want

Import numpy as np

On Sat, Jun 22, 2019, at 9:22 PM, Barry Duggan wrote:

I am trying to build an Out of Tree block in Python, but having a 

problem. The tutorial on building a Python block (squareme) didn't 

address input and output ports :(

Here is my code (just to get the basic structure):

"""

#!/usr/bin/env python

# -*- coding: utf-8 -*-

#

# Copyright 2019 Barry Duggan KV4FV

#

from gnuradio import gr

from numpy import np

ITA2 = [ 0x00, 'E', '\n', 'A', ' ', 'S', 'I', 'U', '\r', 'D', 'R', 'J', 

'N', 'F', 'C', 'K',

             'T', 'Z', 'L', 'W', 'H', 'Y', 'P', 'Q', 'O', 'B', 'G', 0x0e, 

'M', 'X', 'V', 0x0f,

             0x00, '3', '\n', '-', ' ', 0x07, '8', '7', '\r', '$', '4', 

'\'', ',', '!', ':', '(',

             '5', '\"', ')', '2', '#', '6', '0', '1', '9', '\?', '\&', 

0x0e, '.', '/', ';', 0x0f ]

_figs = 0x1b

_ltrs = 0x1f

_shift = 0

class convUtoI_bb(gr.sync_block):

     """convert UTF-8 to ITA2 (Baudot)"""

     def __init__(self):

         gr.sync_block.__init__(self,

             name="convUtoI_bb",

             in_sig=[np.byte],

             out_sig=[np.byte])

     def work(self, input_items, output_items):

         in0 = input_items[0]

         out = output_items[0]

#       if char is in ITA2

         if (in0 in ITA2):

             _idx = ITA2.index

#           store ITA2 char

             _idx &= 0x1F

             out[:] = int(_idx)

         else:

             out[:] = in0

         return len(output_items[0])

"""

and at execution I get:

Traceback (most recent call last):

   File "/home/pi/gnuradio/test0621.py", line 26, in <module>

     import UTFtoITA

   File "/usr/lib/python2.7/dist-packages/UTFtoITA/__init__.py", line 34, 

in <module>

     from convUtoI_bb import convUtoI_bb

   File "/usr/lib/python2.7/dist-packages/UTFtoITA/convUtoI_bb.py", line 

23, in <module>

     from numpy import np

ImportError: cannot import name np

If importing numpy is not correct, how do I specify the size of the 

input and output ports?

Thanks.

-- 

Barry Duggan

_______________________________________________

Discuss-gnuradio mailing list

Discuss-gnuradio@gnu.org

https://lists.gnu.org/mailman/listinfo/discuss-gnuradio