How to Send Unicode DegreeC as a unicode value in a dictionary entry

pylarexx produces the dictionary value "unitofmeasurement": "\u00b0C"

What you're most likely looking at is the JSON representation of a Python dict. Let's assume the goal is to produce this value:

{"unitofmeasurement": "\u00b0C"}

In JSON, this is an object with the property unitofmeasurement, which has as value the string "°C". Yes, the string literal "\u00b0C" in JSON represents the string "°C".

So, in reverse, start with that string in Python:

>>> '°C'
'°C'

Wrap it in a dict:

>>> {'unitofmeasurement': '°C'}
{'unitofmeasurement': '°C'}

Then JSON encode it:

>>> import json
>>> print(json.dumps({'unitofmeasurement': '°C'}))
{"unitofmeasurement": "\u00b0C"}