code: def init(**kwargs):
      
  
      # TODO: Iterate through all engines in name set.
      database = kwargs.pop('database', False)
      if database and not database_exists(engine['default'].url):
          create_database(engine['default'].url, encoding='utf8')
          clear_cache()
  
      expression = lambda target, table: table.create(target)
      test = lambda target, table: table.exists(target)
      op(expression, test=test, primary='init', secondary='create', **kwargs)
docs: Initialize the specified names in the specified databases.
  
      The general process is as follows:
        - Ensure the database in question exists
        - Ensure all tables exist in the database.