old_contents: from catalog import db
  
  db.create_all()
new_contents: from catalog import db
  from catalog.models import Catagory
  
  db.create_all()
  
  animal = Catagory(name='Animal')
  db.session.add(animal)
  art = Catagory(name='Art')
  db.session.add(art)
  audio = Catagory(name='Audio')
  db.session.add(audio)
  autobiograph = Catagory(name='Autobiography')
  db.session.add(autobiograph)
  biography = Catagory(name='Biography')
  db.session.add(biography)
  business = Catagory(name='Business')
  db.session.add(business)
  children = Catagory(name='Children')
  db.session.add(children)
  classics = Catagory(name='Classics')
  db.session.add(classics)
  comedy = Catagory(name='Comedy')
  db.session.add(comedy)
  comic = Catagory(name='Comic')
  db.session.add(comic)
  computing = Catagory(name='Computing')
  db.session.add(computing)
  culture = Catagory(name='Culture')
  db.session.add(culture)
  education = Catagory(name='Education')
  db.session.add(education)
  fantasy = Catagory(name='Fantasy')
  db.session.add(fantasy)
  fiction = Catagory(name='Fiction')
  db.session.add(fiction)
  finance = Catagory(name='Finance')
  db.session.add(finance)
  food = Catagory(name='Food')
  db.session.add(food)
  health = Catagory(name='Health')
  db.session.add(health)
  history = Catagory(name='History')
  db.session.add(history)
  home = Catagory(name='Home')
  db.session.add(home)
  horror = Catagory(name='Horror')
  db.session.add(horror)
  language = Catagory(name='Language')
  db.session.add(language)
  music = Catagory(name='Music')
  db.session.add(music)
  nonfiction = Catagory(name='Non-Fiction')
  db.session.add(nonfiction)
  other = Catagory(name='Other')
  db.session.add(other)
  poetry = Catagory(name='Poetry')
  db.session.add(poetry)
  politics = Catagory(name='Politics')
  db.session.add(politics)
  reference = Catagory(name='Reference')
  db.session.add(reference)
  religion = Catagory(name='Religion')
  db.session.add(religion)
  romance = Catagory(name='Romance')
  db.session.add(romance)
  short = Catagory(name='Short Stories')
  db.session.add(short)
  sport = Catagory(name='Sport')
  db.session.add(sport)
  thriller = Catagory(name='Thriller')
  db.session.add(thriller)
  travel = Catagory(name='Travel')
  db.session.add(travel)
  true_crime = Catagory(name='True Crime')
  db.session.add(true_crime)
  db.session.commit()
subject: insert catagories into database during setup