Python Set Methods

Question 1

Adds an element to the set

Answer 1

add()

Question 2

Removes all the elements from the set

Answer 2

clear()

Question 3

Returns a copy of the set

Answer 3

copy()

Question 4

Returns a set containing the difference between two or more sets

Answer 4

difference()

Question 5

Removes the items in this set that are also included in another, specified set

Answer 5

difference_update()

Question 6

Remove the specified item

Answer 6

discard()

Question 7

Returns a set, that is the intersection of two or more sets

Answer 7

intersection()

Question 8

Removes the items in this set that are not present in other, specified set(s)

Answer 8

intersection_update()

Question 9

Returns whether two sets have a intersection or not

Answer 9

isdisjoint()

Question 10

Returns whether another set contains this set or not

Answer 10

issubset()

Question 11

Returns whether this set contains another set or not

Answer 11

issuperset()

Question 12

Removes an element from the set

Answer 12

pop()

Question 13

Removes the specified element

Answer 13

remove()

Question 14

Returns a set with the symmetric differences of two sets

Answer 14

symmetric_difference()

Question 15

inserts the symmetric differences from this set and another

Answer 15

symmetric_difference_update()

Question 16

Return a set containing the union of sets

Answer 16

union()

Question 17

Update the set with another set, or any other iterable

Answer 17

update()

Question 18

What is a python set?

Answer 18

• Sets are used to store multiple distinct items in a single variable.
• A set is a collection which is unordered, unchangeable*, and unindexed.
• Set items are unchangeable, but you can remove items and add new items.
• Sets are written with curly brackets.
• Set items are unordered, unchangeable, and do not allow duplicate values.
• Since sets are unordered, so you cannot be sure in which order the items will appear.
• Set items can appear in a different order every time you use them, and cannot be referred to by index or key.
• Sets cannot have two items with the same value.
• Set is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Tuple, and Dictionary, all with different qualities and usage.
• To determine how many items a set has, use the len() function.
• Set items can be of any data type:

Question 19

How are sets created?

Answer 19

• Sets are written with curly brackets
  myset = {“apple”, “banana”, “cherry”}
• It is also possible to use the set() constructor to make a set.
  thisset = set((“apple”, “banana”, “cherry”)) # note the double round-brackets