def test_named_pickle():
"""Pickling is reversible on quantities backed by named units"""
named = named_unit('S', 'N', 'D')
arbitrary_quantity = named(3.0)
pickled = dumps(arbitrary_quantity)
unpickled = loads(pickled)
assert within_epsilon(arbitrary_quantity, unpickled)
def __init__(self, codata):
#SI units
self.si_mass = unit('kg')
self.si_charge = unit('C')
self.si_energy = unit('J')
self.si_action = unit('J') * unit('s')
self.si_time = unit('s')
self.si_frequency = unit('Hz')
#farad_per_meter = unit('F') / unit('m')
self.codata = codata
#Define basic atomic units constants
self.mass = scaled_unit('mass_au', *codata['electron mass'])
self.charge = scaled_unit('charge_au', *codata['atomic unit of charge'])
self.electrostatic_constant = named_unit('eps0_au', ['F'], ['m'],
codata['atomic unit of permittivity'][1])
self.hbar = named_unit('action_au', ['J'], ['s'],
codata['atomic unit of action'][1])
self.alpha = codata['fine-structure constant'][1]
self.time = scaled_unit('time_au', *codata['atomic unit of time'])
#Derived units
self.speed = scaled_unit("speed_au", *codata['atomic unit of velocity'])
self.lightspeed = self.speed(codata['speed of light in vacuum'][1])
self.length = scaled_unit('length_au', 'm',
(self.electrostatic_constant * self.hbar**2 /
(self.mass * self.charge**2)).squeeze())
self.energy = scaled_unit('energy_au', 'J',
(self.hbar**2 / (self.mass * self.length**2)).squeeze())
self.electric_field_strength = named_unit('efield_au', ['V'], ['m'],
(self.charge / (self.electrostatic_constant * self.length**2)).squeeze())
self.frequency = scaled_unit('frequency_au', 'Hz', 1.0/self.time.squeeze())
#Other units
self.electron_volt = scaled_unit('eV', *codata['electron volt'])
self.femtosecond = scaled_unit('fs', 's', self.si_time.squeeze()*1e-15)
"""Define the scalar units used by vehicle measurements."""
import sys
from units import unit, scaled_unit, named_unit
import units.predefined
units.predefined.define_units()
Percentage = unit('%')
Meter = unit('m')
Kilometer = scaled_unit('km', 'm', 1000)
Hour = unit('h')
KilometersPerHour = unit('km') / unit('h')
RotationsPerMinute = unit('rotations') / unit('m')
Litre = unit('L')
Degree = unit('deg')
NewtonMeter = named_unit("Nm", ["N", "m"], [])
MetersPerSecondSquared = unit('m') / (pow(unit('s'), 2))
Undefined = unit('undef')
def define_complex_si_units():
"""Define SI units that are built on other SI units.
>>> define_complex_si_units()
>>> unit('Hz').is_si()
True
"""
LeafUnit("rad", name="radian", is_si=True) # Plane angle
LeafUnit("sr", name="steradian", is_si=True) # Solid angle
named_unit("Hz", [], ["s"], name="hertz") # Frequency
named_unit("N", ["m", "kg"], ["s", "s"], name="newton") # Force
named_unit("Pa", ["N"], ["m", "m"], name="pascal") # Pressure or mechanical stress
named_unit("J", ["N", "m"], [], name="joule") # Energy, work, or amount of heat (Dangerous, 3J is a complex number)
named_unit("W", ["J"], ["s"], name="watt") # Power or heat flow rate
named_unit("C", ["s", "A"], [], name="coulomb") # Electric charge
named_unit("V", ["W"], ["A"], name="volt") # Electromotive force, electric potential difference
named_unit("Ohm", ["V"], ["A"], symbal=u"Ω", name="ohm") # Electrical resistance
named_unit("F", ["C"], ["V"], name="farad") # Capacitance
named_unit("Wb", ["V", "s"], [], name="weber") # Magnetic flux
named_unit("T", ["Wb"], ["m", "m"], name="tesla") # Magnetic flux density
named_unit("H", ["Wb"], ["A"], name="henry") # Inductance
named_unit("lm", ["cd", "sr"], [], name="lumen") # Luminous flux
named_unit("lx", ["lm"], ["m", "m"], name="lux") # Illuminance
named_unit("Bq", [], ["s"], name="becquerel") # Radiation - source activity
named_unit("Gy", ["J"], ["kg"], name="gray") # Radiation - absorbed dose
named_unit("Sv", ["J"], ["kg"], name="sievert") # Radiation - equivalent dose
named_unit("S", ["A"], ["V"], name="siemens") # Siemens
named_unit("kat", ["mol"], ["s"], name="katal") # Katal
"""Define the scalar units used by vehicle measurements."""
from __future__ import absolute_import
import sys
from units import unit, scaled_unit, named_unit
import units.predefined
units.predefined.define_units()
Percentage = unit("%")
Meter = unit("m")
Kilometer = scaled_unit("km", "m", 1000)
Hour = unit("h")
KilometersPerHour = unit("km") / unit("h")
RotationsPerMinute = unit("rotations") / unit("m")
Litre = unit("L")
Degree = unit("deg")
NewtonMeter = named_unit("Nm", ["N", "m"], [])
MetersPerSecondSquared = unit("m") / (pow(unit("s"), 2))
Undefined = unit("undef")
def define_complex_si_units():
"""Define SI units that are built on other SI units.
>>> define_complex_si_units()
>>> unit('Hz').is_si()
True
"""
for sym in ["rad", "sr"]:
LeafUnit(sym, is_si=True)
named_unit("Hz", [], ["s"]) #hertz
named_unit("N", ["m", "kg"], ["s", "s"]) #Newton
named_unit("Pa", ["N"], ["m", "m"]) #pascal
named_unit("J", ["N", "m"], []) #Joule # Dangerous, 3J is a complex number
named_unit("W", ["J"], ["s"]) # Watt
named_unit("C", ["s", "A"], []) # Coulomb
named_unit("V", ["W"], ["A"]) # Volt
named_unit("F", ["C"], ["V"]) # Farad
named_unit("Ohm", ["V"], ["A"])
named_unit("S", ["A"], ["V"]) #Siemens
named_unit("Wb", ["V", "s"], []) # Weber
named_unit("T", ["Wb"], ["m", "m"]) # Tesla
named_unit("H", ["Wb"], ["A"]) # Henry
named_unit("lm", ["cd", "sr"], []) # lumen
named_unit("lx", ["lm"], ["m", "m"]) #lux
named_unit("Bq", [], ["s"]) # Becquerel
named_unit("Gy", ["J"], ["kg"]) # Gray
named_unit("Sv", ["J"], ["kg"]) # Sievert
named_unit("kat", ["mol"], ["s"]) # Katal
def define_complex_si_units():
"""Define SI units that are built on other SI units.
>>> define_complex_si_units()
>>> unit('Hz').is_si()
True
"""
for sym in ["rad", "sr"]:
LeafUnit(sym, is_si=True)
named_unit("Hz", [], ["s"]) #hertz
named_unit("N", ["m", "kg"], ["s", "s"]) #Newton
named_unit("Pa", ["N"], ["m", "m"]) #pascal
named_unit("J", ["N", "m"], []) #Joule # Dangerous, 3J is a complex number
named_unit("W", ["J"], ["s"]) # Watt
named_unit("C", ["s", "A"], []) # Coulomb
named_unit("V", ["W"], ["A"]) # Volt
named_unit("F", ["C"], ["V"]) # Farad
named_unit("Ohm", ["V"], ["A"])
named_unit("S", ["A"], ["V"]) #Siemens
named_unit("Wb", ["V", "s"], []) # Weber
named_unit("T", ["Wb"], ["m", "m"]) # Tesla
named_unit("H", ["Wb"], ["A"]) # Henry
named_unit("lm", ["cd", "sr"], []) # lumen
named_unit("lx", ["lm"], ["m", "m"]) #lux
named_unit("Bq", [], ["s"]) # Becquerel
named_unit("Gy", ["J"], ["kg"]) # Gray
named_unit("Sv", ["J"], ["kg"]) # Sievert
named_unit("kat", ["mol"], ["s"]) # Katal