27. Remove Element

class Solution(object):
    def removeElement(self, nums, val):
        """
        :type nums: List[int]
        :type val: int
        :rtype: int
        """
        l = len(nums)
        for i in range(l):
            while i < l and nums[i] == val:
                nums.pop(i)
                l -= 1
        return len(nums)