This is a binary tree representation that allows user to create a binary tree by providing the serialized string representation of the binary tree. It also provides preOrderIter, inOrderIter, postOrderIter and bfsIter iterators that iterates through the elements in a binary in corresponding manner.

Input: the result of BFS traversal of the target binary tree, None is represented as #. For example, the result of BFS traversal of the binary tree below is: [8, 3, 10, 1, 6, #, 14, #, #, 4, 7, 13, #, #, #, #, #, #, #]

to create a binary tree instance of it

from BinaryTree.binaryTree import binaryTree

sampleBT = binaryTree('[8, 3, 10, 1, 6, #, 14, #, #, 4, 7, 13, #, #, #, #, #, #, #]')

now we have the binary tree instance, we can iterate through its elements in different manners:

• default(preorder interation):

for val in sampleBt:
    print(val)

result: 8 3 1 6 4 7 10 14 13

• preorder iteration:

for val in sampleBt.preOrderIter():
    print(val)

result: 8 3 1 6 4 7 10 14 13

• inorder iteration:

for val in sampleBt.inOrderIter():
    print(val)

result: 1 3 4 6 7 8 10 13 14

• postorder iteration:

for val in sampleBt.postOrderIter():
    print(val)

result: 1 4 7 6 3 13 14 10 8

• BFS iteration:

for val in sampleBt.bfsIter():
    print(val)

result:8 3 10 1 6 14 4 7 13