json和pinkle

json & pickle 序列化

json
    文件只能存取字符串和二进制数据，可以在存储时进行json序列化，读取时进行json反序列化
    loads/dumps　　　　loads: str转化为json, dumps:json转化为str
        with open('testjson.txt','w') as f:
            f.write(json.dumps(a))
        with open('testjson.txt','r') as b:
            res = json.loads(b.read())
    load/dump
        with open('testjson.txt','w') as f:
            json.dump(a, f)
        with open('testjson.txt','r') as b:
            res = json.load(b)

pickle
    和json一样，但是存储的是二进制文件，仅支持python
    loads/dumps
        with open('testjson.txt','w') as f:
            f.write(pickle.dumps(a))
        with open('testjson.txt','r') as b:
            res = pickle.loads(b.read())
    load/dump
        with open('testjson.txt','w') as f:
            json.dump(a, f)
        with open('testjson.txt','r') as b:
            res = json.load(b)