嵌套列表如何去重而顺序不变？

Question

例如：
l = [['百度', 'BD'], ['京东', 'JD'], ['淘宝', 'TB'], ['百度', 'BD']]
如何实现去重后的结果
l = [['百度', 'BD'], ['京东', 'JD'], ['淘宝', 'TB']]

Answer 1

l = [['百度', 'BD'], ['京东', 'JD'], ['淘宝', 'TB'], ['百度', 'BD']]
output=[]
while(l):
    p = l.pop()
    if p in l:
        continue
    else:
        output.insert(0,p)
print(output)

Answer 2

有帮助望采纳~

Answer 3

谢谢，但对多重嵌套似乎没用，如
l = [['百度', 'BD'], ['京东', 'JD'], [['百度', 'BD'], ['淘宝', 'TB'], ['百度', 'BD']]]

Answer 4

l = [['百度', 'BD'], ['京东', 'JD'], [['百度', 'BD'], ['淘宝', 'TB'], ['百度', 'BD']]]
output = []
 
 
def list_append(l: list, output: list):
 
    while(l):
        p = l.pop(0)
        if type(p) == list and type(p[0]) == list:
            list_append(p, output)
        else:
            if p in output:
                continue
            else:
                output.append(p)
 
 
output = []
list_append(l, output)
print(output)