优雅的方法来删除列表中连续的重复元素？

def remove_consecutive_duplicates(lst):
    return [x for i, x in enumerate(lst) if i == 0 or x != lst[i-1]]

import itertools

def remove_consecutive_duplicates(lst):
    return list(itertools.groupby(lst))

def remove_consecutive_duplicates(lst):
    return [x for x, _ in zip(lst, range(len(lst)))]

def remove_consecutive_duplicates(lst):
    if not lst:
        return []
    slow, fast = 0, 1
    while fast < len(lst):
        if lst[fast] != lst[slow]:
            slow += 1
            lst[slow] = lst[fast]
        fast += 1
    return lst[:slow+1]