entity_repr.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import uuid


def entity_repr(entity, attrs):
    """Dumps attributes and values of given entity object."""
    attrs_repr = (u"%s=%s" % (n, repr(getattr(entity, n))) for n in attrs)
    unicode_repr = u"%s(%s)" % (type(entity).__name__, u", ".join(attrs_repr))
    return unicode_repr.encode("utf-8") if str is bytes else unicode_repr


class Book(object):
    """The book entry model."""

    def __init__(self, title, creator, language, **kwargs):
        self.title = title
        self.creator = creator
        self.language = language
        self.uuid = kwargs.pop("uuid", self.gen_default_uuid())

    def __repr__(self):
        return entity_repr(self, ["title", "creator", "language", "uuid"])

    def gen_default_uuid(self):
        """Creates a new random UUID."""
        return str(uuid.uuid4())


def demo():
    """Just a demo."""
    book = Book(title=u"背影", creator=u"朱自清", language=u"zh-Hans")
    print repr(book)
    print eval(repr(book))