json&pickle序列化

import  json   #导入json模块
 
info = {
    ‘name‘:"seven",
    "age":32
}
 
with open("test.txt","w") as f:  #以普通模式写入
    data = json.dumps(info) #把内存对象转为字符串
    f.write(data)   #写到文件中
 
#text.txt文件中的内容
{"name": "seven", "age": 32}

import json
 
with open("test.txt","r") as f:  #以普通模式读
    data = json.loads(f.read())   #用loads反序列化
 
print(data.get("age"))
 
#输出
32

import  json
 
info = {
    ‘name‘:"seven",
    "age":32
}
 
with open("test.txt","w") as f:   #文件以写的方式打开
    json.dump(info,f)    #第1个参数是内存的数据对象 ，第2个参数是文件句柄
 
#text.txt文件中的内容
{"name": "seven", "age": 32}

import json
 
with open("test.txt","r") as f:   #以读的方式打开文件
    data = json.load(f)  #输入文件对象
 
print(data["age"])
 
#输出
32

import  json
 
def sayhi(name):  #函数
    print("name:",name)
 
info = {
    ‘name‘:"seven",
    "age":32,
    "func":sayhi    #引用sayhi函数名
}
 
with open("test.txt","w") as f:
    json.dump(info,f)   #序列化info数据对象
 
#输出
 File "D:\Python\Python35\lib\json\encoder.py", line 403, in _iterencode_dict
    yield from chunks
  File "D:\Python\Python35\lib\json\encoder.py", line 436, in _iterencode
    o = _default(o)
  File "D:\Python\Python35\lib\json\encoder.py", line 179, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <function sayhi at 0x00000000006DD510> is not JSON serializable  #不支持json序列化

import pickle
 
info = {
    ‘name‘:"seven",
    "age":32,
}
 
with open("test.txt","wb") as f:   #以二进制的形式写入
    data = pickle.dumps(info)   #序列化成字符串
    f.write(data)   #写入test.txt 文件中
 
#输出到test.txt文件中的内容
?}q (X   ageq
KX   nameqX
   sevenqu.

import pickle
 
with open("test.txt","rb") as f: #以二进制的模式读
    data = pickle.loads(f.read())   #反序列化操作
 
print(data.get("age"))
 
#输出
32

import pickle
 
info = {
    ‘name‘:"seven",
    "age":32,
}
 
with open("test.txt","wb") as f:
    pickle.dump(info,f)  #序列化
 
#输出
?}q (X   ageq
KX   nameqX
   sevenqu.

import pickle
 
with open("test.txt","rb") as f:
    data = pickle.load(f)  #反序列化成内存对象
 
print(data.get("age"))
 
#输出
32

import pickle
 
def sayhi(name):   #函数
    print("hello:",name)
 
info = {
    ‘name‘:"seven",
    "age":32,
    "func":sayhi    #"func"对应的值sayhi，是函数名
}
 
with open("test.txt","wb") as f:
    data = pickle.dumps(info)
    f.write(data)
 
#输出test.txt
?}q (X   funcq
c__main__
sayhi
qX   ageqKX   nameqX
   seven.

import pickle
 
def sayhi(name):   #在反序列化中必须写上此函数，不然会报错，因为在加载的时候，函数没有加载到内存
    print("hello:",name)
 
with open("test.txt","rb") as f:
    data = pickle.loads(f.read())
 
print(data.get("age"))
 
data.get("func")("seven")  #执行函数sayhi
 
#输出
32
hello: seven   #输出的函数体中的逻辑也是可以变的，这边我就不做演示了