Python LinkedDeque.back示例

示例#1

 def test_push_back(self):
     q = LinkedDeque()
     q.push_back("A")
     assert q.length() == 1
     q.push_back("B")
     assert q.length() == 2
     assert q.front() == "A"
     assert q.back() == "B"

示例#2

 def test_back(self):
     q = LinkedDeque()
     assert q.back() is None