Statically typed units.
Type safe assignments:
duration: u.Duration = u.seconds(5) # Ok
distance: u.Distance = u.amperes(5) # Type checking error
Type safe math:
print(u.seconds(120) + u.minutes(3)) # Ok
print(u.seconds(120) + u.amperes(3)) # Type checking error
Type safe derived units:
Speed = u.Div[u.Distance, u.Duration]
speed: Speed = u.km(5) / u.hours(1) # Ok
speed: Speed = (u.km / u.hours)(5) # Also ok
ElectricCharge = u.Mul[u.Duration, u.ElectricCurrent]
charge: ElectricCharge = u.sec(3) * u.amperes(2) # Ok
charge: ElectricCharge = u.amperes(2) * u.sec(3) # Also ok
Reusable prefixes:
print(u.megabytes(5) == u.mega(u.bytes)(5)) # True
Define your own quantities and units:
class Tastiness(u.Quantity):
pass
mmm = u.Unit(Tastiness, symbol='mmm', multiplier=1)
yum = u.Unit(Tastiness, 'yum', 10)
taste: Tastiness = yum(42)