old_contents: import socket
  import threading
  import time
  import struct
  import rlp
  from crypto import keccak256
  from secp256k1 import PrivateKey
  from ipaddress import ip_address
  
  class EndPoint(object):
      def __init__(self, address, udpPort, tcpPort):
          self.address = ip_address(address)
          self.udpPort = udpPort
          self.tcpPort = tcpPort
  
      def pack(self):
          return [self.address.packed,
          struct.pack(">H", self.udpPort),
          struct.pack(">H", self.tcpPort)]
new_contents: import socket
  import threading
  import time
  import struct
  import rlp
  from crypto import keccak256
  from secp256k1 import PrivateKey
  from ipaddress import ip_address
  
  class EndPoint(object):
      def __init__(self, address, udpPort, tcpPort):
          self.address = ip_address(address)
          self.udpPort = udpPort
          self.tcpPort = tcpPort
  
      def pack(self):
          return [
              self.address.packed,
              struct.pack(">H", self.udpPort),
              struct.pack(">H", self.tcpPort),
          ]
  
subject: Fix style