DATA STRUCTURES

DATA STRUCTURES

1. LISTS

   • [...,...,...,...]
   • Changeable, ordered, allow duplicates
   • CAN include elements w different data types
   • Adding a element to a list → place it at the end EX:myList.append
   • When deleting an element from a list → remove or pop EX: myList.remove(“”) OR myList.pop(“”)
   • Access an element in a list, use the square brackets (w placement in list (starts w 0)) Item = myList[2]

2. TUPLES

   • (...,...,...,)
   • Used to store multiple items in a single variable
   • Ordered, unchangeable, and allow duplicates

3. SETS

   • Unordered, unchangeable, reject duplicates
   • Elements w different data types
   • mySet - {..,...,...}
   • Don't use indices to access sets BUT can Loop to see their items EX: for x in mySet: print (x)
   • Can also check (TRUE or FALSE) in an element exists in Set EX: print(“banana” in mySet)
   • Can add elements to set using .add(...)
   • Merge sets using .update(...)

4. DICTIONARIES

   • Store data in key:value format
   • Very powerful structures to describe items
   • Values in dictionary can be of any datatype EX: carOnSale = { “Brand”: “Toyota”, “Year”: 2018, }
   • When printed: {key1:value1, …, …}