NameMixin For SqlAlchemy

model_mixins.py

from sqlalchemy import inspect

def to_str(x, charset='utf8', errors='strict'):
    if x is None or isinstance(x, str):
        return x

    if isinstance(x, unicode):
        return x.encode(charset, errors)

    return str(x)

class NameMixin(object):
    def __str__(self):
        identity = inspect(self).identity
        if identity is None:
            pk = "(transient {})".format(id(self))
        else:
            pk = ', '.join(to_str(value) for value in identity)
        return '<{} [{}] {}>'.format(type(self).__name__, pk, to_str(self.name))