old_contents: from electrum.util import print_msg, raw_input
  from .keepkey import KeepKeyPlugin
  from ..hw_wallet import CmdLineHandler
  
  class Plugin(KeepKeyPlugin):
      handler = CmdLineHandler()
      @hook
      def init_keystore(self, keystore):
          if not isinstance(keystore, self.keystore_class):
              return
          keystore.handler = self.handler
  
new_contents: from electrum.plugins import hook
  from electrum.util import print_msg, raw_input
  from .keepkey import KeepKeyPlugin
  from ..hw_wallet import CmdLineHandler
  
  class Plugin(KeepKeyPlugin):
      handler = CmdLineHandler()
      @hook
      def init_keystore(self, keystore):
          if not isinstance(keystore, self.keystore_class):
              return
          keystore.handler = self.handler
  
subject: Fix undefined reference error in command line KeepKey plugin.