"""
[Homework] 2021-01-08
To do a small research on Tree structure
Write some description or introduction to the tree structure.
at the same time , please give at least 3 examples of tree structure.

1 letter size

how to change the Current Working Directory

chdir()


Tree structure
root node
normal node - one parent, 0..n child nodes
leaf node - which cannot have child nodes (file)

ADT - Abstract Data Type

Example of tree structure

Skill tree


"""


import os

cdir = os.getcwd()
print(cdir)

os.chdir("../day11_210116")

cdir2 = os.getcwd()
print(cdir2)

