devices.py

import json

class Device:
    def __init__(self):
        self.battery = 100
        self.power_status = True

    def power_switch(self):
        # if currently powered on
        if self.power_status: 
            self.power_status = False
        else:
            self.power_status = True
    

class Camera(Device):
    def __init__(self, lens):
        self.lens = lens

    def take_picture(self):
        return "Click"

class Phone(Device):
    def __init__(self, speaker):
        self.speaker = speaker

    def call(self):
        return "Ring Ring"

    def answer(self):
        return "Hello?"

    def text(self, to, msg):
        return json.dumps({to:to, msg:msg})     

# class CameraPhone(Camera, Phone):
#     def __init__(self, lens, speaker):
#         # Camera.__init__(self, lens)
#         # Phone.__init__(self, speaker)
#         self.lens = lens
#         self.speaker = speaker

class CameraPhone(Camera, Phone):
    def __init__(self, lens, speaker):
        Camera.__init__(self, lens)
        Phone.__init__(self, speaker)
#         self.lens = lens
#         self.speaker = speaker
    def send_pic(self, to):
        img = self.take_picture()
        self.text(self, to, img)

cp = CameraPhone(100, "whaaaa?") 
# cp.lens = 10
# cp.speaker = "Hell yeah"

print("Our new CameraPhone exhibits multiple behaviors ...")
print("It can take a picture: ", cp.take_picture()) 
print("It can also make calls: ", cp.call())       

print(cp.lens)
print(cp.speaker)