# pickle持久化

**1.保存bytes形式**dumps()

把任意对象序列化成一个bytes，然后，就可以把这个bytes写入文件，或者通过网络传输。 

```python
import pickle

d = dict(name='Bob', age=20, score=88)
bts=pickle.dumps(d)
print type(bts)# 输出：<type 'str'>

#加载方式，读取bytes
bj2 = pickle.loads(bts) 
print type(obj2)# 输出：<type 'tuple'>   
print obj2# 输出：d {'age': 20, 'score': 88, 'name': 'Bob'}
```

**2.文件形式，dump，load**

直接把对象序列化后写入一个file-like Object：

```python
f = open('dump.txt', 'wb') 
pickle.dump(d, f) 
f.close() 

f = open('dump.txt', 'rb')
d = pickle.load(f)
f.close()
#d {'age': 20, 'score': 88, 'name': 'Bob'}
```


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