python的数组

西大

python没有数组，只有list

class Member:
def __init__(self, id):
self.id = id
def getId(self):
return self.id
list = [Member(1),Member(2),Member(3),Member(4)]
newlist = [l.getId() for l in list]
print list
print newlist



定义
   list= [1,2,3,4,5]
list条件复制
>>> a = [1,2,3]
>>> [a1 for a1 in a if a1>1]
输出[2, 3]
dict([(up.user_id,up) for up in  UserProfile.objects.filter(user__id__in=user_id_list)])
['%s=%s' % (key, urllib.quote(str(value))) for (key, value) in param.items() if value != None]

dict([(m.id,m) for m in messages if m.category==1])
添加元素
list.append(1)
>> [1,2,3,4,5,1]
1ist.extend([1,2,3])
>> [1,2,3,4,5,1,2,3]
list.insert(2, 100)  
[1,2,100,3,4,5]
slice
python没有subArray，不过提供了非常强大的slice
list[being:end](不含end)
list[1:2]
>>2
循环
import math
for i in range(50, 100 + 1):
    print i
更多：http://woodpecker.org.cn/diveintopython/native_data_types/lists.html