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
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