def __init__(self, lid, init_capacity, delay):
    self.lid = lid
    self.init_capacity = init_capacity
    self.capacity = init_capacity
    self.end1 = 'None'
    self.end2 = 'None'
    self.delay = delay
    self.level = 'None'
    self._edges = []
def __init__(self, lid, init_capacity, delay):
    self.lid = lid
    self.init_capacity = init_capacity
    self.capacity = init_capacity
    self.end1 = 'None'
    self.end2 = 'None'
    self.delay = delay
    self.level = 'None'
    self._edges = []