python核心模块之pickle和cPickle
pickle模块的功能就是执行序列化和反序列化，分别是通过dump()函数和load()函数完成的。
dump()函数接受一个文件句柄和一个数据对象作为参数，把数据对象以特定的格式保存到给定的文件中。当我们使用load()函数从文件中取出已保存的对象时，pickle知道如何恢复这些对象到它们本来的格式。
cPickle是pickle得一个更快得C语言编译版本。
[这里写链接内容](http://blog.csdn.net/yucan1001/article/details/8478755)
>>> a1 = 'apple'
>>> b1 = {1: 'One', 2: 'Two', 3: 'Three'}
>>> c1 = ['fee', 'fie', 'foe', 'fum']
>>> f1 = file('temp.pkl', 'wb')
>>> pickle.dump(a1, f1, True)
>>> pickle.dump(b1, f1, True)
>>> pickle.dump(c1, f1, True)
>>> f1.close()
>>> f2 = file('temp.pkl', 'rb')
>>> a2 = pickle.load(f2)
>>> a2
'apple'
>>> b2 = pickle.load(f2)
>>> b2
{1: 'One', 2: 'Two', 3: 'Three'}
>>> c2 = pickle.load(f2)
>>> c2
['fee', 'fie', 'foe', 'fum']
>>> f2.close() pickle还有另一个函数对dumps()和loads()，dumps(object) 返回一个字符串，它包含一个 pickle 格式的对象； loads(string) 返回包含在 pickle 字符串中的对象
>>> import cPickle as pickle
>>> t1 = ('this is a string', 42, [1, 2, 3], None)
>>> t1
('this is a string', 42, [1, 2, 3], None)
>>> p1 = pickle.dumps(t1)
>>> p1
"(S'this is a string'/nI42/n(lp1/nI1/naI2/naI3/naNtp2/n."
>>> print p1
(S'this is a string'
I42
(lp1
I1
aI2
aI3
aNtp2
.
>>> t2 = pickle.loads(p1)
>>> t2
('this is a string', 42, [1, 2, 3], None)
>>> p2 = pickle.dumps(t1, True)
>>> p2
'(U/x10this is a stringK*]q/x01(K/x01K/x02K/x03eNtq/x02.'
>>> t3 = pickle.loads(p2)
>>> t3
('this is a string', 42, [1, 2, 3], None)