Initialisation du repository de Beta

venv/lib/python3.12/site-packages/sympy/physics/units/systems/mksa.py

@@ -0,0 +1,54 @@
+"""
+MKS unit system.
+
+MKS stands for "meter, kilogram, second, ampere".
+"""
+
+from __future__ import annotations
+
+from sympy.physics.units.definitions import Z0, ampere, coulomb, farad, henry, siemens, tesla, volt, weber, 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 = [ampere, volt, ohm, siemens, farad, henry, coulomb, tesla, weber]
+
+all_units: list[Quantity] = []
+for u in units:
+    all_units.extend(prefix_unit(u, PREFIXES))
+all_units.extend(units)
+
+all_units.append(Z0)
+
+dimsys_MKSA = dimsys_length_weight_time.extend([
+    # Dimensional dependencies for base dimensions (MKSA not in MKS)
+    current,
+], new_dim_deps={
+    # Dimensional dependencies for derived dimensions
+    "voltage": {"mass": 1, "length": 2, "current": -1, "time": -3},
+    "impedance": {"mass": 1, "length": 2, "current": -2, "time": -3},
+    "conductance": {"mass": -1, "length": -2, "current": 2, "time": 3},
+    "capacitance": {"mass": -1, "length": -2, "current": 2, "time": 4},
+    "inductance": {"mass": 1, "length": 2, "current": -2, "time": -2},
+    "charge": {"current": 1, "time": 1},
+    "magnetic_density": {"mass": 1, "current": -1, "time": -2},
+    "magnetic_flux": {"length": 2, "mass": 1, "current": -1, "time": -2},
+})
+
+MKSA = MKS.extend(base=(ampere,), units=all_units, name='MKSA', dimension_system=dimsys_MKSA, derived_units={
+    magnetic_flux: weber,
+    impedance: ohm,
+    current: ampere,
+    voltage: volt,
+    inductance: henry,
+    conductance: siemens,
+    magnetic_density: tesla,
+    charge: coulomb,
+    capacitance: farad,
+})