Use of @property decorator

[buran]

Actually, this:

def __init__(self):
    self.variable = 5
 
@property
def variable(self):
    return self._variable
 
@variable.setter
def variable(self, value):
    self._variable = value

is NOT OK. You don't need to use setter and property in this case. You don't do anything additional in the setter and/or property. In your original code you were checking the value and raising error if not accepted value.

Example for OK:

from math import pi 

class Circle:
    def __init__(self, radius):
        self.radius = radius

    @property
    def circumference(self):
        return 2 * pi * self.radius

    @property
    def diameter(self):
        return self.radius * 2

    @diameter.setter
    def diameter(self, value):
        self.radius = value / 2



circle = Circle(2)
print(f'circumference:{circle.circumference}')
print(f'diameter: {circle.diameter}')
circle.diameter = 8
print(f'radius: {circle.radius}')
print(f'circumference: {circle.circumference}')

Note - it's possible to complicate the example by allowing user to define Circle by radius OR diameter in __init__

The second one is fine in my opinion as long as reset() is really needed and used later/elsewhere in the code or as instance method.