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
>
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