def __init__(self, name='Water', rho=1000, c11=2190000000.0, c12=0.0, c22=0.0, c44=0.0, eta_v=0, eta_s=0, label=0):
    '\n\t\tConstructor of the Material object\n\t\t'
    self.name = name
    self.rho = rho
    self.c11 = c11
    self.c12 = c12
    self.c22 = c22
    self.c44 = c44
    self.VL = sqrt((c11 / rho))
    self.VT = sqrt((c44 / rho))
    self.eta_v = eta_v
    self.eta_s = eta_s
    self.Label = label
Constructor of the Material object
def __init__(self, name='Water', rho=1000, c11=2190000000.0, c12=0.0, c22=0.0, c44=0.0, eta_v=0, eta_s=0, label=0):
    '\n\t\t\n\t\t'
    self.name = name
    self.rho = rho
    self.c11 = c11
    self.c12 = c12
    self.c22 = c22
    self.c44 = c44
    self.VL = sqrt((c11 / rho))
    self.VT = sqrt((c44 / rho))
    self.eta_v = eta_v
    self.eta_s = eta_s
    self.Label = label