Leetcode 27 Remove Element

class Solution:    # @param {integer[]} nums    # @param {integer} val    # @return {integer}    def removeElement(self, nums, val):        Length = len(nums);size = 0        if Length==0: return 0        for i in range(Length):            if nums[i]!=val:                nums[size]=nums[i];size += 1        return size