leetcode Remove Element python

class Solution(object):
    def removeElement(self, nums, val):
        """
        :type nums: List[int]
        :type val: int
        :rtype: int
        """
        if len(nums) <= 0:
            return 0
        k=0
        for i in nums:
            if i != val:
                nums[k]=i
                k+=1
        return k