def __init__(self, name, diameter, density, molecWeight):
        """Initialize a material object.

        :param name: Name of the material
        :type name: string
        :param diameter: Diameter of the material in particulate form
        :type diameter: float
        :param density: Density of the material (mass/volume)
        :type density: float
        :param molecWeight: Molecular weight of the material (mass/mole)
        :type molecWeight: float
        """
        self.name = name
        self.Diameter = diameter
        self.Density = density
        self.MolecWeight = molecWeight
def __init__ ( self , name , diameter , density , molecWeight ) : self . name = name self . Diameter = diameter self . Density = density self . MolecWeight = molecWeight
Initialize a material object.

        :param name: Name of the material
        :type name: string
        :param diameter: Diameter of the material in particulate form
        :type diameter: float
        :param density: Density of the material (mass/volume)
        :type density: float
        :param molecWeight: Molecular weight of the material (mass/mole)
        :type molecWeight: float