axis = self.player_loc[direction]

for i, amount in enumerate(self.calculate(*_split_decimal_part(amount))):
    try:
        axis[i] += amount
    except IndexError:
        axis.append(amount)

overflow = 0
for i, amount in enumerate(axis):
    amount += overflow
    negative = math.copysign(1, amount)
    overflow, remainder = [n * negative for n in divmod(abs(amount), self.BLOCK_SIZE)]
    self.player_loc[direction][i] = remainder