>>> from nuvols import NuvolPunts
>>> from datetime import datetime
>>> data = datetime(2023, 2, 22, 10, 30)
>>> n = NuvolPunts(data, [('IP1', 34), ('IP44', 35), ('IP51', 35.3)])
>>> str(n.temps)
'2023-02-22 10:30:00'
>>> n['IP1']
34
>>> n['IP2']
'Unknown'
>>> n['IP51']
35.3
>>> for p in n:
...    print(p)
...
IP1
IP44
IP51
>>> n['IP51'] = 45
>>> n['IP51']
45
>>> n['IP58'] = 39
>>> n['IP58']
39