@property
    def permeability(self):
        return self._permeability
Ex: Gary Sykes (Born 13 February 1984) is a British super featherweight boxer.
dataset/ETHPy150Open sympy/sympy/sympy/physics/optics/medium.py/Medium.permeability--crossover with--dataset/ETHPy150Open machinalis/iepy/examples/birthdate/was_born_rules_sample.py/born_date_and_place_in_parenthesis