>>> q.Quantity(1, "km")
array(1) * km
>>> a=q.Quantity(1, "N")
>>> a
array(1) * N
>>> a=q.Quantity(1, "kN")
Traceback (most recent call last):
  File "/home/andrea_palazzi/funimatic-venv/lib/python3.13/site-packages/quantities/registry.py", line 33, in __getitem__
    return eval(string, self.__context)
  File "<string>", line 1, in <module>
NameError: name 'kN' is not defined

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<python-input-10>", line 1, in <module>
    a=q.Quantity(1, "kN")
  File "/home/andrea_palazzi/funimatic-venv/lib/python3.13/site-packages/quantities/quantity.py", line 131, in __new__
    ret._dimensionality.update(validate_dimensionality(units))
                               ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
  File "/home/andrea_palazzi/funimatic-venv/lib/python3.13/site-packages/quantities/quantity.py", line 34, in validate_dimensionality
    return unit_registry[value].dimensionality
           ~~~~~~~~~~~~~^^^^^^^
  File "/home/andrea_palazzi/funimatic-venv/lib/python3.13/site-packages/quantities/registry.py", line 73, in __getitem__
    return self.__registry[label]
           ~~~~~~~~~~~~~~~^^^^^^^
  File "/home/andrea_palazzi/funimatic-venv/lib/python3.13/site-packages/quantities/registry.py", line 36, in __getitem__
    raise LookupError(
        'Unable to parse units: "%s"'%string
    )
LookupError: Unable to parse units: "kN"