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Concept visual
myset = {"apple", "banana", "cherry"}Sets are used to store multiple items in a single variable.
Formula
Set is one of 4 built - in data types in Python used to store collections of data, the other 3 areList, Tuple, and Dictionary, all with different qualities and usage. A set is a collection which is unordered, unchangeable*, and unindexed. * Note: Set items are unchangeable, but you can remove items and add new items. Sets are written with curly brackets.
thisset = {"apple", "banana", "cherry"}
print(thisset)Sets are unordered, so you cannot be sure in which order the items will appear.
Set items are unordered, unchangeable, and do not allow duplicate values.
Unordered means that the items in a set do not have a defined order. Set items can appear in a different order every time you use them, and cannot be referred to by index or key.
Set items are unchangeable, meaning that we cannot change the items after the set has been created. Once a set is created, you cannot change its items, but you can remove items and add new items.
Sets cannot have two items with the same value.
thisset = {"apple", "banana", "cherry", "apple"}
print(thisset)are considered the same value in sets, and are treated as duplicates:
is considered the same value:
thisset = {"apple", "banana", "cherry", True, 1, 2}
print(thisset)are considered the same value in sets, and are treated as duplicates:
is considered the same value:
thisset = {"apple", "banana", "cherry", False, True, 0}
print(thisset)To determine how many items a set has, use the len() function.
Get the number of items in a set:
thisset = {"apple", "banana", "cherry"}
print(len(thisset))Formula
Set Items - Data TypesSet items can be of any data type:
String, int and boolean data types:
set1 = {"apple", "banana", "cherry"}
set2 = {1, 5, 7, 9, 3}
set3 = {True, False, False}A set can contain different data types: