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Mini Shell
Mini Shell
"""
MKS unit system.
MKS stands for "meter, kilogram, second, ampere".
"""
from typing import List
from sympy.physics.units.definitions import Z0, A, C, F, H, S, T, V, Wb, ohm
from sympy.physics.units.definitions.dimension_definitions import (
capacitance, charge, conductance, current, impedance, inductance,
magnetic_density, magnetic_flux, voltage)
from sympy.physics.units.prefixes import PREFIXES, prefix_unit
from sympy.physics.units.systems.mks import MKS, dimsys_length_weight_time
from sympy.physics.units.quantities import Quantity
dims = (voltage, impedance, conductance, current, capacitance, inductance, charge,
magnetic_density, magnetic_flux)
units = [A, V, ohm, S, F, H, C, T, Wb]
all_units = [] # type: List[Quantity]
for u in units:
all_units.extend(prefix_unit(u, PREFIXES))
all_units.extend([Z0])
dimsys_MKSA = dimsys_length_weight_time.extend([
# Dimensional dependencies for base dimensions (MKSA not in MKS)
current,
], new_dim_deps=dict(
# Dimensional dependencies for derived dimensions
voltage=dict(mass=1, length=2, current=-1, time=-3),
impedance=dict(mass=1, length=2, current=-2, time=-3),
conductance=dict(mass=-1, length=-2, current=2, time=3),
capacitance=dict(mass=-1, length=-2, current=2, time=4),
inductance=dict(mass=1, length=2, current=-2, time=-2),
charge=dict(current=1, time=1),
magnetic_density=dict(mass=1, current=-1, time=-2),
magnetic_flux=dict(length=2, mass=1, current=-1, time=-2),
))
MKSA = MKS.extend(base=(A,), units=all_units, name='MKSA', dimension_system=dimsys_MKSA)
Zerion Mini Shell 1.0