清理我的清单

Question

您好我有一个循环,它会计算我的MySQL数据库中的不同记录,然后将数字保存到列表中.这是清单:
[1L, 2L, 2L, 5L, 4L, 1L, 1L, 1L, 3L, 1L, 1L, 2L, 2L, 3L, 3L, 1L, 2L, 4L, 2L, 1L, 3L, 1L, 2L, 4L, 1L, 2L, 1L, 1L, 3L, 1L, 3L, 1L, 5L, 2L, 1L, 1L, 5L, 1L, 1L, 1L, 4L, 2L, 1L, 3L, 2L, 1L, 2L, 2L, 2L, 3L, 1L, 1L, 3L, 2L, 2L, 1L, 3L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 1L, 1L, 1L, 1L, 2L, 1L, 3L, 3L, 1L, 2L, 1L, 1L, 2L, 1L, 1L, 1L, 2L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L]

现在我通过这个列表,我想只留下一个数字(意思是1L,2L等)我正在使用这个循环:

for number in legend:
        print number # to check what number it does currently
        counter = legend.count(number)
        while counter > 1:
            legend.remove(number)
            counter -= 1 

这意味着它有效,但为什么它不适合5号？

thx提前

Answer 1

把它放进去吧set.

>>> foo = [1,1,1,2,2,3,3,4,1,4,3,6,5,6]
>>> set(foo)
set([1, 2, 3, 4, 5, 6])

这将自动过滤掉所有重复项.也许你甚至可以跳过列表,并把它放在一个set位置.