In order to work with persistence, we need some objects that we want to save. We'll look at a simple microblog and the posts on that blog. Here's a class definition for Post:
from dataclasses import dataclass
import datetime
@dataclass
class Post:
date: datetime.datetime
title: str
rst_text: str
tags: List[str]
def as_dict(self) -> Dict[str, Any]:
return dict(
date=str(self.date),
title=self.title,
underline="-" * len(self.title),
rst_text=self.rst_text,
tag_text=" ".join(self.tags),
)
The instance variables are the attributes of each microblog post – a date, a title, some text, and some tags. Our attribute name provides us with a hint that the text should be in reStructuredText(reST) markup, even though that's largely...
