>>> from artropode import Artropode

>>> f = Artropode('Formica rufa', 'Formiga roja', 3)
>>> f.nom_cientific
'Formica rufa'
>>> f.nom_comu
'Formiga roja'
>>> f.nombre_tagmes
3
>>> f.num_apendixs()
0
>>> f['potes'] = 6
>>> f['antenes'] = 2
>>> f['mandibules'] = 2
>>> f.num_apendixs()
10
>>> f['mandibules'], f['antenes'], f['potes'], f['ales']
(2, 2, 6, 0)

>>> p = Artropode('Palinurus elephas', 'Llagosta vermella', 2)
>>> p['potes'] = 10
>>> p['antenes'] = 4
>>> p.num_apendixs()
14
>>> p['potes'], p['antenes'], p['xxx']
(10, 4, 0)