from enum import Enum


class PhysicsConstantName(str, Enum):
    PI = 'pi'
    C = 'c'
    SPEED_OF_LIGHT = 'speed_of_light'
    G = 'G'
    NEWTONIAN_GRAVITATION = 'newtonian_gravitation'
    H = 'h'
    PLANCK_CONST = 'planck_const'
    MU_0 = 'mu_0'
    VACUUM_PERMEABILITY = 'vacuum_permeability'
    E_0 = 'E_0'
    VACUUM_PERMITIVITY = 'vacuum_permitivity'
    Z_0 = 'Z_0'
    VACUUM_IMPEDANCE = 'vacuum_impedance'
    K_E = 'k_e'
    COULOMB_CONST = 'coulomb_const'
    E = 'e'
    ELEMENTARY_CHARGE = 'elementary_charge'
    M_E = 'm_e'
    ELECTRON_MASS = 'electron_mass'
    M_P = 'm_p'
    PROTON_MASS = 'proton_mass'
    MU_B = 'mu_B'
    BOHR_MAGNETON = 'bohr_magneton'
    NA = 'NA'
    AVOGADRO_NUM = 'avogadro_num'
    R = 'R'
    MOLAR_GAS_CONST = 'molar_gas_const'
    K_B = 'K_B'
    BOLTZMANN_CONST = 'boltzmann_const'
    F = 'F'
    FARADAY_CONST = 'faraday_const'
    SIGMA = 'sigma'
    STEFAN_BOLTZMANN_CONST = 'stefan_boltzmann_const'

    def __str__(self) -> str:
        return str(self.value)