python基础语法19 面向对象总结，pickle保存对象注意事项

class Foo:
y = 20 def __new__(cls, *args, **kwargs):
print('从文件中读取对象，是否会执行__new__???')
return object.__new__(cls) def __init__(self, x):
self.x = x def func(self):
passf_obj = Foo(100)
# print(f_obj.__dict__)
# print(f_obj.func)import pickle
# 开始将对象写文件中
with open('tank_handsome', 'wb') as f:
pickle.dump(f_obj, f)# 从文件中读取对象
with open('tank_handsome', 'rb') as f:
obj = pickle.load(f) #实际上会寻找程序中对应的类，如果没有会报错，如果有就按照当前类的内容
print(obj.__dict__)
print(obj.func)