Python如何才能实现两个列表的减法并且不去重？

Python如何才能实现两个列表的减法并且不去重？
例如
cont_list = ['a','b','c','d','a']
cont = ['a']
如何使得cont_list减去cont结果为['b','c','d','a']？

cont_list = ['a', 'b', 'c', 'd', 'a']
cont = ['a']
result = [x for x in cont_list if x not in cont]
print(result)  # 输出 ['b', 'c', 'd', 'a']