Python中class的三种继承方法

佚名 6年前 (2019-05-14) 随笔 1217人围观抢沙发百度已收录

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：

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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()