Python - extending properties like you'd extend a function

Question

Question

How can you extend a python property?

A subclass can extend a super class\'s function by calling it in the overloaded version, a

Answer 1

If I understand correctly what you want to do is call the parent's method from the child instance. The usual way to do that is by using the super built-in.

I've taken your tongue-in-cheek example and modified it to use super in order to show you:

class NormalMath(object):
    def __init__(self, number):
        self.number = number

    def add_pi(self):
        n = self.number
        return n + 3.1415


class NewMath(NormalMath):
    def add_pi(self):
        # this will call NormalMath's add_pi with
        normal_maths_pi_plus_num = super(NewMath, self).add_pi()
        return int(normal_maths_pi_plus_num)

In your Log example, instead of calling:

self._dataframe = LogFile.dataframe.getter() 

you should call:

self._dataframe = super(SensorLog, self).dataframe

You can read more about super here

Edit: Even thought the example I gave you deals with methods, to do the same with @properties shouldn't be a problem.