python shelve
shelve模块是一个简单的k,v将内存数据通过文件持久化的模块，可以持久化任何pickle可支持的python数据格式1.shelve
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#!/usr/bin/env python
#-*- coding:utf-8 –*-
import shelve
d = shelve.open("shelve_test")
l1=["a1"]
l2=["a2"]
l3=["a3"]
d["k1"] = l1
d["k2"] = l2
d["k3"] = l3
d.close()
>>> import shelve
>>> a = shelve.open("shelve_test")
>>> a.get("k1")
['a1']
>>> a.get("k2")
['a2']
>>> a.get("k3")
['a3']
>>> a.get("k1")
['a1']
2.pick
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import pickle
l1=["a1"]
l2=["a2"]
l3=["a3"]
with open("pickle","wb") as f:
pickle.dump(l1,f)
pickle.dump(l2, f)
pickle.dump(l3, f)
>>> import pickle
>>> f = open("pickle","rb")
>>> pickle.load(f) #只能按顺序读取
['a1']
>>> pickle.load(f)
['a2']
>>> pickle.load(f)
['a3']
>>> pickle.load(f)
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