from pydantic.dataclasses import dataclass
@dataclass
class Glass:
    capacity_volume : float
    occupied_volume : float

glass = Glass(300, 100)       # OK int to float
print(glass) # Glass(capacity_volume=500.0, occupied_volume=0.0)

glass = Glass(300.0, 100.0)   # OK
print(glass) # Glass(capacity_volume=500.0, occupied_volume=0.0)

glass = Glass('300', '100')   # OK str to float
print(glass) # Glass(capacity_volume=500.0, occupied_volume=0.0)

glass.capacity_volume = '300'
print(glass) # Glass(capacity_volume='300', occupied_volume=0.0)