Defining units help

[aldo-o]

Greetings,

I am reading the docs in regards to defining new units but I don't get the results I want. This is the case scenario;

I want to implement Heat of Combustion (per Mass). When I make the conversion online 1 Joule per Kilogram [J/KG] = 1000 Kilogram per Kilojoule [Kg/KJ].

This is the configuration of the text file:

# Defitions
# j_kg 	-> Joule per Kilogram [J/kg]
# kg_j 	-> Kilogram per Joule [kg/J]
# kg_kj	-> Kilogram per Kilojoule [kg/KJ]

j_kg = [heat_of_combustion_per_mass] = kg_j
kg_kj = 1000 * j_kg

But when I execute this code;

ureg = UnitRegistry()
ureg.load_definitions("./my_def.txt")

test = 2 * ureg["j_kg"]
print(test.to(ureg["kg_kj"]))

and it returns 0.002 kg_kj. It should return 2000 kg_kj.

Thank You in advance!

UPDADE #1: Never mind. It 1:00 AM and my brain in not functioning well. My apologies.