Help me fix a problem

[Spencer Du]

Hi 

I want to print yes in gui.py but it does not get printed because of the json. How do I fix this. Execute embedded.py and then gui.py to test.

Regards 

Spencer

[Nick O'Leary]

Hi,

this mailing list is about the MQTT protocol in general - it isn't a support forum for specific client libraries or languages.

Given you've not had much response on your previous questions along these lines, you may need to find a more appropriate forum to ask in.

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[Julien Christophe]

Hello!

I think it is a pure python question, but it is occulted because of the library you use. 

In the line :

if msg.payload[name] == "Hello world!": print("yes")

The variable "name" isn't defined, but as it is in an handler, i think you don't got the exception thrown in the main thread. 

You probably wanted to provide the string "name" instead. 

Another thing : you "decode" the message payload, it probably just decode from bytes to str, then you have to parse it again ("decode") to have a json data structure. 

I didn't try but this is my first thoughts.

Please provide more logs about what happens next time ;) 

Programingly speaking, you could also catch the whole function exceptions to see better which exceptions could happend, or add an "else" clause with logs :) 

Regards, 

Julien

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[Spencer Du]

So how do I do this:

"Another thing : you "decode" the message payload, it probably just decode from bytes to str, then you have to parse it again ("decode") to have a json data structure."

Regards 
Spencer

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[Julien Christophe]

Stack ovetflow is your friend ;)

https://docs.python.org/3/library/json.html

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