Python中class的三种继承方法

class parent(object):

	def implicit(self):
		print("Parent implicit()")
	def override(self):
		print("Parent override()")
	def altered(self):
		print("Parent altered()")

class child(parent):

    def override(self):
        print("Child override()")
    def altered(self):
        print("Child,Before Parent altered()")
        super(child,self).altered()
        print("Child,After Parent altered()")

dad=parent()
son=child()

dad.implicit()
son.implicit()

dad.override()
son.override()

dad.altered()
son.altered()

运行结果：

Parent implicit()
Parent implicit()
Parent override()
Child override()
Parent altered()
Child,Before Parent altered()
Parent altered()
Child,After Parent altered()

还可以写成：

class parent():

	def implicit(self):
		print("Parent implicit()")
	def override(self):
		print("Parent override()")
	def altered(self):
		print("Parent altered()")

class child(parent):

	def __init__(self):
		self.parent =parent()

	def implicit(self):
		self.parent.implicit()

	def override(self):
		print("Child override()")

	def altered(self):
		print("Child,Before Parent altered()")
		super(child,self).altered()
		print("Child,After Parent altered()")

dad=parent()
son=child()

dad.implicit()
son.implicit()

dad.override()
son.override()

dad.altered()
son.altered()