chapter 01
chapter 01 update
chapter 02 list
chapter 02 tuple
chapter 03 string operation
chapter 03 join rfind find endswith startswith
chapter 03 string lower capitalize title upper
chapter 03 string replace expandtabs
chapter 03 string split strip translate
chapter 04 dict
chapter 04 dict format
chapter 04 dict copy deepcopy get items
chapter 04 dict key pop values
chapter 05 grammar print import
chapter 05
chapter 05 loop
chapter 06 function oo
chapter 06 function params
chapter 06 functin struct params
chapter 06 function recursion