Python Set

Set is an unordered and unindexed collection of items.

Create a Set

Sets are written with curly brackets.

 ages =  {26,56,90}
 print(ages)  
 
 Output
 {56,26,90}

Access Set Elements

We cannot access items in set by referring to an index because sets are unordered and unindexed,the items has no index.

Loop through Tuple

We can loop through the set items by using a for loop.

  fruit={"apple","banana","cherry"}
    for x in fruit:
        print(x)  
 
 Output
 apple
 banana
 cherry

Set Length

To determine how many items a set has, use the len() function.

>
fruit={"apple","banana", "cherry"}
  print(len(fruit)) 
 
 Output
 3

Add Items in Set

To add one item to a set,use add() method.

 fruits={"apple","banana","cherry"}
    fruits.add("orange")
    print(fruits)
 
 Output:
 {'apple','banana','orange','cherry'}

To add more than one items in set,use update() method.

  fruits={"apple","banana","cherry"}
    fruits.update(["orange","mango"])
    print(fruits)
 
 Output:
 {'apple','banana','cherry','orange','mango',}

Remove Items in Set

To remove an item in a set,use the remove() method or the discard() method.

 fruits={"apple","banana","cherry"}
    fruits.remove("banana")
    print(fruits)
 
 Output:
 {'apple','cherry',}

Using discard() method.

 fruits={"apple","banana","cherry"}
    fruits.discard("banana")
    print(fruits)
 
 Output:
 {'apple','cherry',}

Set Constructor

Using set() constructor,we can make a set.

>
 thisset=set(("apple","banana","cherry"))
    print(thisset)
 
 Output:
 {'cherry','apple','banana'}