Python Sets
myset = {"apple", "banana", "cherry"}
Set
Sets are used to store multiple items in a single variable.
Lists are one of 4 built-in data types in Python used to store collections of data, the other 3 are Tuple, List, and Dictionary, all with different qualities and usage.
print(thisset)
Set Items
Set items are unordered, unchangeable, and do not allow duplicate values.
Unordered
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.
Unchangeable
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.
Duplicates Not Allowed
Sets cannot have two items with the same value.
thisset = {"apple", "banana", "cherry", "apple"}
print(thisset)
Get the Length of a Set
To determine how many items a set has, use the len() function.
thisset = {"apple", "banana", "cherry"}
print(len(thisset))
Set Items - Data Types
Set items can be of any data type:
set1 = {"apple", "banana", "cherry"}
set2 = {1, 5, 7, 9, 3}
set3 = {True, False, False}
also,
set1 = {"abc", 34, True, 40, "male"}
type()
From Python's perspective, sets are defined as objects with the data type 'set':
<class 'set'>The set() Constructor
It is also possible to use the set() constructor to make a set.
thisset = set(("apple", "banana", "cherry")) # note the double round-brackets
print(thisset)
The set() Constructor
It is also possible to use the set() constructor to make a set.
thisset = set(("apple", "banana", "cherry")) # note the double round-brackets
print(thisset)
