python 列表去重的几种方法

1

a = [1,1,1,2,3,3,4,5,6,6,6]
a1 = []
for i in a:
    if i not a1:
        a1.append(i)
    else:
        continue

2

a = [1,1,1,1,2,3,4,4,4,5]
a1 = set(a)

3

a = [1,1,1,1,1,2,3,3,4,5,6]
for i in a:
    while a.count(i)>1:
        del a[a.index(i)]

4

import itertools

a = [1,1,1,1,2,3,43,5]
a1 = []
for i in itertools.groupby(a):
    a1.append(i)