dependency.py

class DHCP:
  def dhcp_test(self):
     self.executor.exec_command("dhcp test")



class Client(DHCP):

  def __init__(self, executor):
    self.executor = executor




class Executor:
  def exec_command(self, cmd):
     print(cmd)



class Executor2:
  def exec_command(self, cmd):
     print("begin exec")
     print(cmd)
     print("end exec")




client = Client(Executor())

client.dhcp_test();


client2 = Client(Executor2())

client2.dhcp_test();

mixins.py

class DHCP:
  def dhcp_test(self):
     self.exec_command("dhcp test")

class Executor:
  def exec_command(self, cmd):
     print(cmd)

class Client(Executor, DHCP):
  pass


class Executor2:
  def exec_command(self, cmd):
     print("begin exec")
     print(cmd)
     print("end exec")

class Client(Executor, DHCP):
  pass


class Client2(Executor2, DHCP):
  pass



client = Client()

client.dhcp_test();


client2 = Client2()

client2.dhcp_test();