我为类对象定义了方法append（）和方法extend（）。它分别追加到成员myList并扩展成员myList。
global globalList
globalList = []
class MyList():
def __init__(self):
self._myList = [1, 2, 3]
@property
def myList(self):
return self._myList + globalList
@myList.setter
def myList(self, val):
self._myList = val
def append(self, val):
self.myList = self.myList + [val]
return self.myList
def extend(self, val):
return self.myList.extend(val)
mL1 = MyList()
print("myList: ", mL1.myList)
mL1.append(4)
print("after appending a 4, myList: ", mL1.myList)
mL1.myList.extend([5,6,"eight","IX"])
print("after extend, myList: ", mL1.myList)
结果是
>>>
('myList: ', [1, 2, 3])
('after appending a 4, myList: ', [1, 2, 3, 4])
('after extend, myList: ', [1, 2, 3, 4, 5, 6, 'eight', 'IX'])
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