python 序列化

序列化

　　1、json模块

　　2、pickle模块

　　3、shelve模块

#-----json模块-----

#----将字典存储到文本dumps()方法

 1 import json
 2 
 3 #实例1    dumps()
 4 a = {'name':'dream','age':'18'}
 5 a = json.dumps(a) #dumps 加载进去
 6 with open('json_test.json','w') as f:
 7     f.write(a)
 8     f.close()
 9 
10 #实例2    dump()
11 a = {'name':'dream','age':'18'}
12 with open('json_test2.json','w') as f:
13     json.dump(a,f)
14     f.close()

 

#------将文本读取loads()方法

 1 import json
 2 
 3 #实例1    loads()
 4 with open('json_test.json','r') as f:
 5     a = f.read()
 6     a = json.loads(a)
 7     print(a['name'])  #dream
 8     f.close()
 9 #实例2    load()
10 with open('json_test2.json','r') as f:
11 
12     a = json.load(f)
13     print(a['name'])  #dream
14     f.close()

 

#-----pickle模块-----

#python内部数据转换
#将函数写入文本 dumps() 方法

1 import pickle
2 
3 def foo():
4     print('python')
5 
6 a = pickle.dumps(foo)
7 with open('pickle_test','wb') as f:
8     f.write(a)
9     f.close()

 

#将文本读取loads()

 1 import pickle
 2 
 3 def foo():   #需要将函数同时复制一份
 4     print('python')
 5 
 6 with open('pickle_test','rb') as f:
 7     a = f.read()
 8     a = pickle.loads(a)
 9     a()
10     f.close()

 

#-----shelve模块-----

 1 import shelve
 2 
 3 f = shelve.open(r'shelve_test.txt')
 4 # r python源生字符串,d:\\abc.txt 容易在读取文件时容易产生歧义（报错无法读取）
 5 
 6 f['info']={'name':'yzz','age':'26'}
 7 f['shopping'] = {'name':'dream','age':'20'}
 8 
 9 date = f.get('info') #获取文件内容
10 date1 =f.get('shopping')
11 print(date)
12 print(date1['name'])