What's wrong? ( a code from medium post )

Question

class Vehicle:

def __init__(self, number_of_wheels,type_of_tank, seating_capacity,maximum_velocity):

self.number_of_wheels = number_of_wheels
self.type_of_tank = type_of_tank
self.seating_capacity = seating_capacity
self.maximum_velocity = maximum_velocity

@property
def number_of_wheels(self):
return self.number_of_wheels

@number_of_wheels.setter
def set_number_of_wheels(self,number):
self.number_of_wheels = number

tesla_model_s = Vehicle(4,'electric',5,250)
print(tesla_model_s.number_of_wheels)
tesla_model_s.number_of_wheels = 2
print(tesla_model_s.number_of_wheels)

https://code.sololearn.com/cdPUy5h3veX4/#py

Shows AttributeError:

Traceback (most recent call last):
File "..\Playground\", line 18, in <module>
tesla_model_s = Vehicle(4,'electric',5,250)
File "..\Playground\", line 4, in __init__
self.number_of_wheels = number_of_wheels
AttributeError: can't set attribute

Answer 1

Debug Rstar's code with setter

https://code.sololearn.com/cRghetR0bx9B/?ref=app

Answer 2

https://code.sololearn.com/c3kmgg5zW0V6/?ref=app

Answer 3

Its better to used to use setter / getter
https://stackoverflow.com/questions/4183432/cant-set-attribute-with-new-style-properties-in-JUMP_LINK__&&__python__&&__JUMP_LINK/7973702

Answer 4

Thanks Rstar
What's with the "_" ? Why we have to add that?

Answer 5

Rstar , your code run but you don't use the setter. Why ?