python数组去重复

方法1 创建新的数组

ids &＃61; [1,2,3,4,5,6,7,8,1,2,3]
set_ids &＃61; []
for id in ids:if id not in set_ids:set_ids.append(id)
print set_ids
# 1 2 3 4 5 6 7 8# 或者可以直接使用set,无法保持原有顺序
set_ids&＃61;set(ids )


方法2 set

ids &＃61; [1,2,3,4,5,6,7,8,1,2,3]
ids &＃61; list(set(ids))
# 1 2 3 4 5 6 7 8


方法3 利用lambda匿名函数和 reduce 函数处理

ids &＃61; [1,2,3,4,5,6,7,8,1,2,3]
func &＃61; lambda x,y:x if y in x else x &＃43; [y]
reduce(func, [[], ] &＃43; ids)


方法4 使用itertools模块

import itertools
ids &＃61; [1,2,3,4,5,6,7,8,1,2,3]
ids.sort()
it &＃61; itertools.groupby(ids)
for k, g in it:print k


方法5 while遍历去重

ids &＃61; [1,2,3,4,5,6,7,8,1,2,3]
def delRepeat(ids):for x in ids:while ids.count(x)>1:del ids[ids.index(x)]return ids