1. copy.copy 浅拷贝 只拷贝父对象，不会拷贝对象的内部的子对象。
2. copy.deepcopy 深拷贝 拷贝对象及其子对象
一个很好的例子：
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
import copy
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
a = [1, 2, 3, 4, ['a', 'b']] #原始对象
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
b = a #赋值，传对象的引用
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
c = copy.copy(a) #对象拷贝，浅拷贝
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
d = copy.deepcopy(a) #对象拷贝，深拷贝
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
a.append(5) #修改对象a
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
a[4].append('c') #修改对象a中的['a', 'b']数组对象
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
print 'a = ', a
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
print 'b = ', b
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
print 'c = ', c
[img]http://www.cnblogs.com/Images/OutliningIndicators/None.gif[/img]
print 'd = ', d
输出结果：
a = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
b = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
c = [1, 2, 3, 4, ['a', 'b', 'c']]
d = [1, 2, 3, 4, ['a', 'b']]
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