new_contents: import pybookwyrm as bw
  import time
  
  
  def find(wanted, bookwyrm):
      # Changes to wanted are module-local
      # since the item is copied.
      wanted.nonexacts.title = "new title"
  
      # Generate some dummy data
      for i in range(10):
          time.sleep(0.2)
          nonexacts = bw.nonexacts_t(
              {'serie': 'serie' + str(i), 'title': '2title' + str(i)},
              ['Author A. ' + str(i), 'Author B.' + str(i)])
  
          exacts = bw.exacts_t({'year': 2000 + i, 'pages': 500 + i})
  
          book = (nonexacts, exacts)
          bookwyrm.feed(book)
  
subject: add a second test source