def __init__(self, grid, dtype=numpy.float64):
    self.grid = grid
    self.dtype = dtype
    self.data = None
    self.vars = []
    self.nvar = 0
    self.BCs = {}
    self.t = (- 1)
    self.initialized = 0
def __init__(self, grid, dtype=numpy.float64):
    self.grid = grid
    self.dtype = dtype
    self.data = None
    self.vars = []
    self.nvar = 0
    self.BCs = {}
    self.t = (- 1)
    self.initialized = 0