Python/Code/Python10Code/com/twowater/mtest7.py at master · Hoolink/Python · GitHub

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#!/usr/bin/env python3
# -*- coding: UTF-8 -*-


class Meter(object):
    def __init__(self, value=0.0):
        self.value = float(value)

    def __get__(self, instance, owner):
        return self.value

    def __set__(self, instance, value):
        self.value = float(value)


class Foot(object):
    def __get__(self, instance, owner):
        return instance.meter * 3.2808

    def __set__(self, instance, value):
        instance.meter = float(value) / 3.2808


class Distance(object):
    meter = Meter()
    foot = Foot()


if __name__ == '__main__':
    d = Distance()
    print(d.meter, d.foot)
    d.meter = 1
    print(d.meter, d.foot)
    d.meter = 2
    print(d.meter, d.foot)