二叉树的实现

def BinarTree(r):
    return [r,[],[]]

def insertLeft(root,newBrach):
    t=root.pop(1)
    if len(t)>1:
        root.inset(1,[newBrach,t,[]])
    else:
        root.insert(1,[newBrach,[],[]])
    return root

def insertRight(root,newBrach):
    t=root.pop(2)
    if len(t)>1:
        root.insert(2,[newBrach,[],t])
    else:
        root.insert(2,[newBrach,[],[]])
    return root

def getRootVal(root):
    return root[0]

def setRootVal(root,newVal):
    root[0]=newVal

def getLeftChild(root):
    return root[1]

def getRihtChild(root):
    return root[2]

tree=BinarTree('a')
insertLeft(tree,'b')
insertRight(tree,'c')
insertLeft(getLeftChild(tree),'d')
insertRight(getLeftChild(tree),'e')
insertLeft(getRihtChild(tree),'f')
print(tree)

def count(root):
    if root==[]:
        return 0
    else:
        n1=count(root[1])
        n2=count(root[2])
        n=1+n1+n2
        return n

tree=['a',
        ['b',
            ['d',[],[]],
            ['e',[],[]],
        ],
        ['c',
            ['f',[],[]],
            []
        ]
    ]
sum=count(tree)
print(sum)