How to add items to a path where the key contains hyphens?

[rapkin61]

import librouteros
api = connect( username='admin', password='********', host='xxx.xxx.xxx.xxx',)
capsman_interfaces = api.path('caps-man', 'interface')

capsman_interfaces.add( name='test', radio-mac="08:00:00:00:00:08" )
File "", line 1
capsman_interfaces.add( name='test', radio-mac="08:00:00:00:00:08" )
^^^^^^^^^^
SyntaxError: expression cannot contain assignment, perhaps you meant "=="?

capsman_interfaces.add( name='test', "radio-mac"="08:00:00:00:00:08" )
File "", line 1
capsman_interfaces.add( name='test', "radio-mac"="08:00:00:00:00:08" )
^^^^^^^^^^^^
SyntaxError: expression cannot contain assignment, perhaps you meant "=="?

just to see, if add() works at all:

capsman_interfaces.add( name='test' )
'*B'

that looks good!

but as soon as I try this with the radio-mac, it fails:

capsman_interfaces.add( radio-mac='08:00:00:00:00:08' )
File "", line 1
capsman_interfaces.add( radio-mac='08:00:00:00:00:08' )
^^^^^^^^^^
SyntaxError: expression cannot contain assignment, perhaps you meant "=="?

What is my mistake here ?

[luqasz]

https://librouteros.readthedocs.io/en/3.2.1/path.html#update