关于 Python json中load和loads区别

a_json = json.load(open('demo.json','r'))

a = json.loads('{'a':'1111','b':'2222'}')

a_dict = {'a':'1111','b':'2222'}
json.dump(a_dict, open('demo.json', 'w')

a_dict = {'a':'1111','b':'2222'}
a_str = json.dumps(a_dict)

# 使用class对象的__dict__方法
class Student(object):
    def __init__(self, name, age, score):
        self.name = name
        self.age = age
        self.score = score
import json
s = Student('Bob', 20, 88)
print(json.dumps(s, default=lambda obj: obj.__dict__))

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def dict2student(d):
    return Student(d['name'], d['age'], d['score'])

json_str = '{"age": 20, "score": 88, "name": "Bob"}'
print(json.loads(json_str, object_hook=dict2student))

try:
    import cPickle as pickle
except ImportError:
    import pickle

a = dict(a=1, b=2, c=3)
pickle.dumps(a)     # 将对象序列化为str然后存入文件

a = dict(a=1, b=2, c=3)
pickle.dump(a, open('a.txt', 'wb')) # 使用dump直接把对象序列化为file-like Object，注意是二进制存储

pickle.load(open('a.txt', 'rb'))    #从file-like Object中直接反序列化出对象