old_contents: # encoding: utf-8
  
  '''
  @author: Tsuyoshi Hombashi
  '''
  
  VERSION = "0.6.0"
  
  
  def verify_network_interface(device):
      import netifaces
  
      if device not in netifaces.interfaces():
          raise ValueError("invalid network interface: " + device)
  
new_contents: # encoding: utf-8
  
  '''
  @author: Tsuyoshi Hombashi
  '''
  
  VERSION = "0.6.1"
  
  
  def verify_network_interface(device):
      import netifaces
  
      if device not in netifaces.interfaces():
          raise ValueError("invalid network interface: " + device)
  
subject: Update VERSION