Python Example of Class Inheritance

Class Inheritance Example.py

#!/usr/bin/env python3


class Ship():
	def __init__(self, name="Ship", yearBuilt=2000):
		self.name = str(name)
		self.yearBuilt = int(yearBuilt)

	def name(self, name=None):
		if not name == None:
			self.name = str(name)

		return self.name

	def year_built(self, yearBuilt=2000):
		if not yearBuilt == None:
			self.yearBuilt = int(yearBuilt)

		return self.yearBuilt

class CruiseShip(Ship):
	def __init__(self, name="Cruise Ship", yearBuilt=2000, maxPassengers=500):
		Ship.__init__(self, name, yearBuilt)
		self.maxPassengers = int(maxPassengers)

	def max_passengers(self, maxPassengers=500):
		if not maxPassengers == None:
			self.maxPassengers = int(maxPassengers)

		return self.maxPassengers

class CargoShip(Ship):
	def __init__(self, name="Cargo Ship", yearBuilt=2000, maxTonnage=1000):
		Ship.__init__(self, name, yearBuilt)
		self.maxTonnage = float(maxTonnage)

	def max_tonnage(self, maxTonnage=1000):
		if not maxTonnage == None:
			self.maxTonnage = float(maxTonnage)

		return self.maxTonnage

cargo = CargoShip(name="Cargo", yearBuilt=2016, maxTonnage=5000)

print(cargo.max_tonnage(maxTonnage=5000))
print(cargo.max_tonnage())