old_contents: import sqlalchemy as sa
  from database import Base
  
  
  class Song(Base):
      __tablename__ = 'songs'
      song_hash = sa.Column(sa.String(40), primary_key=True)
      filename = sa.Column(sa.Text, nullable=False)
      play_count = sa.Column(sa.Integer, nullable=False)
      artist = sa.Column(sa.Text, nullable=True)
      title = sa.Column(sa.Text, nullable=True)
      length = sa.Column(sa.Integer, nullable=True)
      last_played = sa.Column(sa.DateTime, nullable=True)
      date_added = sa.Column(sa.DateTime, nullable=True)
  
new_contents: import sqlalchemy as sa
  from database import Base
  
  
  class Song(Base):
      __tablename__ = 'songs'
      song_hash = sa.Column(sa.String(40), primary_key=True)
      filename = sa.Column(sa.Text, nullable=False)
      play_count = sa.Column(sa.Integer, nullable=False)
      artist = sa.Column(sa.Text, nullable=True)
      title = sa.Column(sa.Text, nullable=True)
      length = sa.Column(sa.Integer, nullable=True)
      last_played = sa.Column(sa.DateTime, nullable=True)
      date_added = sa.Column(sa.DateTime, nullable=True)
  
      def __repr__(self):
          return "<Song(song_hash={!r}, filename={!r}, play_count={!r}, artist={!r}, title={!r}, length={!r}, last_played={!r}, date_added={!r})>".format(
                 self.song_hash, self.filename, self.play_count, self.artist,
                 self.title, self.length, self.last_played, self.date_added)
  
      def __str__(self):
          return "<Song(song_hash={!s}, filename={!s}, play_count={!s}, artist={!s}, title={!s}, length={!s}, last_played={!s}, date_added={!s})>".format(
                 self.song_hash, self.filename, self.play_count, self.artist,
                 self.title, self.length, self.last_played, self.date_added)
  
subject: Add __repr__ and __str__ for DB model