81   def seek(self, amount, direction=0):  argument
84       self.idx += amount
86       self.idx = self.size - amount
88       self.idx = amount
632   def allocate(self, amount):  argument
637     assert amount > 0, "Must allocate a non-zero amount."
670     while grabbed < amount and len(free_zones) > 0:
675     if grabbed < amount:
678     excess = (grabbed - amount) / self.bytes_per_cluster
696   def extend_cluster(self, cluster, amount):  argument
701     if amount == 0:
708     return_cluster = self.allocate(amount)