car.py

class Car(object):
  def __init__(self,name='General',model='GM',car_type='honda'): 
    self.car_type = car_type
    self.model = model
    self.name = name
    self.speed = 0 
    if name=='Porshe' or name=='Koenigsegg': 
      self.num_of_doors = 2  
    else: 
      self.num_of_doors = 4 
    if car_type=='trailer': 
      self.num_of_wheels = 8 
    else: 
      self.num_of_wheels = 4 
  def doors(self, num_of_doors):
    pass
  def drive(self, moving_man):  
    return moving_man
  def drive(self, spid):  
    if self.car_type=='trailer':   
      self.speed = spid*11   
    else:  
      self.speed = 10**spid  
    return self 
  def wheels(self, num_of_wheels): 
    return num_of_wheels  
  def is_saloon(self): 
    if self.car_type=='trailer':  
      return False  
    else:
      return True