On 08/08/2019 21:47, Spencer Du via Python-list wrote:
Ok so here is some code below. How do I write an if code block to
execute some commands when I subscribe to the topic:
microscope/light_sheet_microscope/UI and which has a message which is
a device type published to it. I want to execute some code to check
if the device has a python file in the currently directory because
each device also relates to a python file. If the file exists then
import the file into the python program else print an error message.
If I need to use on_subscribe callback then tell and show me how the
code is to be written and if another method then also tell me and
show me how to write the code. I really appreciate all the help you
can give me because this is really important for me and I am
currently really struggling with MQTT because I need help with
writing MQTT code because I am working on MQTT at work.
The first thing you need to do is stop, take a breath and write down
step by step exactly what you want done. At the moment you sound like
you are flailing about, and you aren't going to get anything done that
way. Stop and relax for a moment. The example program you have already
should help you figure out what information is available when.
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Rhodri James *-* Kynesim Ltd
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