Cannot get python node to work

Developing Nodes
1

I installed the node-red-contrib-python-function using

npm install -g node-red-contrib-python-function

and the package was added successfully.

However, if I try to use the python node, I get an error:

File "C:\Python38\lib\json_init_.py", line 343, in loads
s = s.decode(detect_encoding(s), 'surrogatepass')
File "C:\Python38\lib\encodings\utf_32_le.py", line 11, in decode
return codecs.utf_32_le_decode(input, errors, True)
UnicodeDecodeError: 'utf-32-le' codec can't decode bytes in position 16-19: code point not in range(0x110000)

The JSON of my Node-RED project is extremely simple

[{"id":"7bc803fa.fe25ac","type":"tab","label":"1","disabled":false,"info":""},{"id":"d3811b80.53c9e8","type":"inject","z":"7bc803fa.fe25ac","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":" { "id": "datapoint1", "value": "124.6215", "timestamp": "1601477603842888960" }","payloadType":"json","x":240,"y":180,"wires":[["de1f02dd.008a9"]]},{"id":"de1f02dd.008a9","type":"python-function","z":"7bc803fa.fe25ac","name":"","func":"\nreturn msg","outputs":1,"x":490,"y":180,"wires":[["2b9229e3.b17286"]]},{"id":"2b9229e3.b17286","type":"debug","z":"7bc803fa.fe25ac","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":780,"y":180,"wires":}]

2

Have you asked the contrib node author?

3

I think others have had problems with that node, the solution is often to use an exec node instead.

4

Or... add MQTT to your python script so it talks to NR in a common method of communication, but it all depends on what the python script is doing, if this is a reasonable option. I have a lot of existing python that I would rather not just replace in NR. So I added MQTT support to much of my python, which made integration of python results into NR, just about painless.

5

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