import copy

list1=[1,2,3,4,5]

c_list1=list1

c_list1[0]=-1

for i in list1:

    print str(i)+' ',

#输出的世 -1,2,3,4,5

print '\n'

print "+++++++++++++++++"

list2=[1,2,3,4,5]

c_list2=[i for i in list2] #并不是深拷贝

c_list2[0]=6

list2[0]=-1

for i in list2:

    print str(i)+' ',

print '\n'

for i in c_list2:

    print str(i)+' ',

#输出-1,2,3,4,5

#输出6,2,3,4,5,

print '\n'

print "+++++++++++++++++"

list3=[1,2,3,4,[5,6,7,8]]

c_list3=[i for i in list3]#for是将list3中的每一个对象的引用拷贝

c_list3[4].append(9) #这样就会出问题

for i in list3:

    print i,

#输出1,2,3,4,[5,6,7,8,9]

print '\n'

#深拷贝

list4=[1,2,3,4,[5,6,7,8]]

c_list4=copy.deepcopy(list4)

c_list4[4].append(9)

for i in list4:

    print i,

#输出1,2,3,4,[5,6,7,8]