解决python list列表查找重复值的下标值问题

#!/usr/bin/env python
# !_*_ coding:utf-8 _*_

"""
@version: python2.7
@license: Apache Licence 
@contact: [email protected]
@site: http://blog.csdn.net/dielian520
@software: PyCharm
@time: 18-2-7 下午6:21
"""
a = [8, 1, 5, 6, 8, 7, 8, 4, 8, 2, 5, 4, 8, 6, 5, 4, 8, 7, 5, 2, 8, 8, 8]
temp = 8
flag = 0
list_index = []
for n in range(a.count(temp)):
    sec = flag
    flag = a[flag:].index(temp)
    list_index.append(flag + sec)
    flag = list_index[-1:][0] + 1
print(list_index)