string = ""
set1 = set() # 
list1 = [] # square brackets
tuple1 = ()
dic = {} # curly braces

mutable vs immutable

Mutable = can be changed in place after it’s created.
Immutable = cannot be changed after it’s created (you must create a new object instead).

  • list: mutable
  • set: mutable, No duplicates, Unordered, can add, remove
  • tuple: immutable