Python Basic Operations-collection

In Python set is a collection type of the base data type, which has both a mutable set (set ()) and an immutable set (Frozenset). Creating Set Sets, collection set additions , collection deletions , intersections , sets , and difference sets is a very useful approach.

List_1 = Set ([1,3,5,7,5,8,10])

List_2 = Set ([2,3,4,5,6,7,8])

List_3 = Set ([1,3,5])

One: basic operation

Adding an Add

List_1.add (123)
Print (list_1)
{1, 3, 5, 7, 8, 10, 123}

Add multiple Update

List_1.update ([10,20,30,50])
Print (list_1)
{1, 3, 5, 7, 8, 10, 50, 20, 30}

Delete Remove if not in the list will be an error

List_1.remove (1)
Print (list_1)
{3, 5, 7, 8, 10}

List_1.remove (20)
Print (list_1)

Traceback (most recent):
File "d:/pycharm/day1/collection test. Py", line +, in <module>
List_1.remove (20)
Keyerror:20

Delete Discard If nothing in the list does not error

List_1.discard (20)
Print (list_1)
{1, 3, 5, 7, 8, 10}

Delete Pop randomly deletes a member

List_1.pop ()
Print (list_1)
{3, 5, 7, 8, 10}

Two: Relationship Testing

Intersection

Print (List_1.intersection (list_2))

{8, 3, 5, 7}

and set

Print (List_1.union (list_2))

{1, 2, 3, 4, 5, 6, 7, 8, 10}

Subtraction

Print (List_1.difference (list_2))

{1, 10}

Subset

Print (List_3.issubset (list_1))

True

Parent Set

Print (List_1.issuperset (list_3))

True

Symmetric difference Sets

Print (List_1.symmetric_difference (list_2))

{1, 2, 4, 6, 10}

Python Basic Operations-collection