[image: image.png]
```
"""
Embedded Python Blocks:
Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__ will
be the parameters. All of them are required to have default values!
"""
import numpy as np
from gnuradio import gr
class blk(gr.sync_block): # other base classes are basic_block,
decim_block, interp_block
"""Embedded Python Block example - a simple multiply const"""
def __init__(self, example_param=1.0): # only default arguments here
"""arguments to this function show up as parameters in GRC"""
gr.sync_block.__init__(
self,
name='Embedded Python Block', # will show up in GRC
in_sig=[np.complex64],
out_sig=[np.complex64]
)
# if an attribute with the same name as a parameter is found,
# a callback is registered (properties work, too).
self.example_param = example_param
def work(self, input_items, output_items):
"""example: multiply with constant"""
output_items[0][:] = input_items[0] * self.example_param
return len(output_items[0])
def set_example_param(self, asdf):
print('here')
```
On Wed, Jun 19, 2024 at 12:12 PM Croizer Mathieu <croizer.math...@gmail.com>
wrote:
> Hello,
>
> Can you post the rest of the code and a snapshot of your project in
> gnuradio? Because with only your function, it's hard to say what happens
> in your python block :)
>
> Best Regards
>
> M. Croizer
>
>
> Le mer. 19 juin 2024 à 14:52, Jameson Collins <jameson.coll...@gmail.com>
> a écrit :
>
>> I'm trying to use a callback to set a variable in an embedded python
>> block. Using the tutorial (
>> https://wiki.gnuradio.org/index.php/Embedded_Python_Block) as an example
>> I added the function below. I've found that this callback never gets
>> called when I update this value from a GUI. Should it be?
>>
>> def set_example_param(self, example_param):
>> print("here")
>>
>>
>>
>>
>>
