Hello I'm new to classes. And I hope the my question isn't too big.
I have electronic test equipment, but thought that a boat example
would be easier. Can you help me untangle my class design?
My problem is basically multiple inheritance, but I want to be
flexible for how many will inherit.
I'll put my example below and also as an attachment.
I'm running Python 2.7 on Linux. Python is the BEST!
Thanks
Ken
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#!/usr/bin/env python
"""
Variable Multiple Inheritance.
email: ke...@kendy.org
A boat has a body and is powered by any combination
of Battery and/or Solar and/or Gas or None.
If a boat is powered, it should have only one emergency_shutoff.
"""
class Body:
""" A boat has a body """
def __init__(self, length):
self.length = length
class Power:
"""
Super Base class
If a boat is powered.
"""
def __init__(self, emergency_shutoff):
self.emergency_shutoff = emergency_shutoff
def Emergency():
emergency_shutoff = True
class Battery(Power):
""" sub Child class """
def __init__(self, emergency_shutoff, battery_volt):
self.battery_volt = battery_volt
Power.__init__(self, emergency_shutoff)
def ChargeBattery():
pass
class Solar(Power):
""" sub Child class """
def __init__(self, emergency_shutoff, solar_volt):
self.solar_volt = solar_volt
Power.__init__(self, emergency_shutoff)
def DoSomethingSolar():
pass
class Gasoline(Power):
""" sub Child class """
def __init__(self, emergency_shutoff, liters):
self.liters = liters
Power.__init__(self, emergency_shutoff)
class Boat1(Body):
""" Sailboat """
pass
class Boat2(Body, Gasoline, Battery):
""" Gas, with battery backup powered """
def __init__(self, length, emergency_shutoff, liters, battery_volt):
Body.__init__(self, length)
Power.__init__(self, emergency_shutoff)
Gasoline.__init__(self, emergency_shutoff, liters)
Battery.__init__(self, emergency_shutoff, battery_volt)
class Boat3(Body, Battery, Solar):
""" Electric powered """
def __init__(self, length, emergency_shutoff, solar_volt, battery_volt):
Body.__init__(self, length)
Power.__init__(self, emergency_shutoff)
Solar.__init__(self, emergency_shutoff, solar_volt)
Battery.__init__(self, emergency_shutoff, battery_volt)
def ShowAssembly(assembly_queue):
for workon in assembly_queue:
pass
def main():
""" Acts like a container class"""
assembly_queue = [] # A list of boats to be assembled, in order.
assembly_queue.append(Boat2(30, False, 'half-full', 50))
assembly_queue.append(Boat3(25, False, 30, 10))
assembly_queue.append(Boat1(20))
ShowAssembly(assembly_queue)
if __name__ == '__main__':
main()
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vary_mult_inherit.py
Description: Binary data
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