在Python 3.4.0中object（）不接受任何参数

Question

Why do I get this error when trying to run the following code?

cObj1 = Car("Ford", "Black") TypeError: object() takes no parameters

class Car(object):
  numwheels = 4
  def display(self):
    print("Make:", self.make)
    print("Colour:", self.colour)
    print("Wheels:", Car.numwheels)

#main program
cObj1 = Car("Ford", "Black")
cObj1.display()

Answer 1

This will do:

class Car:
    numwheels = 4
    def __init__(self, make, colour):
        self.make = make
        self.colour = colour

    def display(self):
      print("Make:", self.make)
      print("Colour:", self.colour)
      print("Wheels:", Car.numwheels)

#main program
cObj1 = Car("Ford", "Black")
cObj1.display()

OUTPUT:

Make: Ford
Colour: Black
Wheels: 4

Few things with your code:

1- You don't have to inherit from object in Python implicitly.

2- You have to initialize all your instance properties before using them. That is usually done inside the __init__ method.

I really recommend you make a fast read https://docs.python.org/3/tutorial/classes.html