Hi There, In this post we’ll learn about python datatypes tuples and sets.

Sets and Tuples

Tuples:

• A tuple is a collection which is ordered and unchangeable. In Python tuples are written with round brackets.

    mu_tuple = (1, 2, 'Hii', True)
  

Tuple Methods

Tuple index()

• The method index() finds the index of a passed value from the Tuple.

• Syntax:

    Tuple.index(item) # Takes three  arguments.
  

• index() method takes three arguments two optional.
• index() method returns index of the passed value from the Tuple.

• Example Usage:

    >>> a_tuple = (1, 2, 3, 4)
    >>> res = a_tuple.index(3) #finding 3 index from a_Tuple
    >>> res
    2
    >>>
  

Tuple count()

• The method count() appends a passed obj into the existing Tuple.

• Syntax:

    Tuple.count(obj) # Takes only one argument
  

• count() method takes only one argument
• count() method does not return any value but updates the existing Tuple.

• Example Usage:

    >>> a_tuple = (1, 2, 3, 4, 3, 3, 3)
    >>> a_tuple.count(3) #Finding no. of occurances of 3 in a_tuple
    4
    >>>
  

Sets:

• A set is a collection which is unordered and unindexed. In Python sets are written with curly brackets.
• Sets does not allow to store duplicate items

• Sets does not support indexing

    my_set = {"apple", "banana", "cherry"}
  

Set Methods

Set add()

• The method add() adds the new item to the existing set.

• Syntax:

    Tuple.add(item)
  

• add() method takes one argument

• add() method returns None but updates the set with given item

• Example Usage:

    >>> my_set = {"apple", "banana", "cherry"}
    >>> my_set.add("grapes")
    >>> my_set
    set(['cherry', 'banana', 'grapes', 'apple'])
    >>>
  

Set remove()

• The method remove() removes the item from the set.

• Syntax:

    Tuple.remove(item)
  

• remove() method takes one argument
• remove() method returns None but removes the given item from the set.

• remove() method will throws KeyError if the given item is not presented.

• Example Usage:

    >>> my_set = {"apple", "banana", "cherry"}
    >>> my_set.remove('apple')
    >>> my_set
    set(['cherry', 'banana'])
    >>>
    >>> my_set.remove('jelly') #Returns KeyError if item not presented.
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    KeyError: 'jelly'
    >>>
  

Set discard()

• The method discard() removes the item from the set if item is presented else returns None.

• Syntax:

    Tuple.discard(item)
  

• discard() method takes one argument
• discard() method returns None but removes the given item from the set.

• discard() method will not throw any Error even if the given item is not presented.

• Example Usage:

    >>> my_set = {"apple", "banana", "cherry"}
    >>> my_set.discard('apple')
    >>> my_set
    set(['cherry', 'banana'])
    >>> my_set.discard('jelly') #Even the jelly is not presented no error will return
    >>>
  

Set Math

Set Union (|)

• Combines two sets into on by elemenating duplicates

    >>> class_one = {'tom', 'tony', 'chris'}
    >>> class_two = {'rocket', 'groot', 'drax'}
    >>> school = class_one | class_two
    >>> school
    set(['tony', 'groot', 'rocket', 'tom', 'chris', 'drax'])
    >>>
  

Set Intersection (&)

• Creates new set with the values that are in both sets

    >>> class_one = {'tom', 'tony', 'chris', 'groot', 'rocket'}
    >>> class_two = {'rocket', 'groot', 'drax', 'thor'}
    >>> class_one & class_two
    set(['groot', 'rocket'])
    >>>