283. 移动零

class Solution:
    def get_zero(self, slow, l_n, nums):
        for t in range(slow, l_n):
            if nums[t] == 0:
                return t

    def moveZeroes(self, nums: List[int]) -> None:
        fast, slow, l_n = 1, 0, len(nums),
        slow = self.get_zero(slow, l_n, nums)
        if slow is not None:
            while fast < l_n:
                if nums[fast] != 0 and fast > slow and slow is not None:
                    nums[slow], nums[fast] = nums[fast], nums[slow]
                    slow = self.get_zero(slow, l_n, nums)
                fast += 1