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import abc
import uuid
class Serializable(metaclass=abc.ABCMeta):
"""
Abstract Base Class that defines an API to save an object's state and restore it later on.
"""
@classmethod
@abc.abstractmethod
def from_state(cls, state):
"""
Create a new object from the given state.
"""
raise NotImplementedError()
@abc.abstractmethod
def get_state(self):
"""
Retrieve object state.
"""
raise NotImplementedError()
@abc.abstractmethod
def set_state(self, state):
"""
Set object state to the given state.
"""
raise NotImplementedError()
def copy(self):
state = self.get_state()
if isinstance(state, dict) and "id" in state:
state["id"] = str(uuid.uuid4())
return self.from_state(state)
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