Lecture "Organising information: unordered structures", exercise 2

[essepuntato]

Consider the set created in the first exercise, stored in the variable my_set. Describe the status of ​my_set after the execution of each of the following operations: ​my_set.remove("Bilbo"), ​my_set.add("Galadriel"), ​my_set.update(set({"Saruman", "Frodo", "Gandalf"})).

[11051620]

my_set = {'Frodo', 'Sam', 'Pippin', 'Merry', 'Galadriel', 'Saruman', 'Gandalf'}

[chloeppd]

my_set.remove("Bilbo")
my_set = {'Sam', 'Pippin', 'Merry', 'Frodo'}

my_set.add("Galadriel")
my_set = {'Sam', 'Galadriel', 'Pippin', 'Merry', 'Frodo'}

my_set.update(set({"Saruman", "Frodo", "Gandalf"}))
my_set ={'Galadriel', 'Merry', 'Pippin', 'Frodo', 'Gandalf', 'Saruman', 'Sam'}

[katya-avem]

1. my_set.remove("Bilbo") --> {'Pippin', 'Merry', 'Sam', 'Frodo'}
2. my_set.add("Galadriel") --> {'Pippin', 'Merry', 'Galadriel', 'Sam', 'Frodo'}
3. my_set.update(set({"Saruman", "Frodo", "Gandalf"})) --> {'Saruman', 'Sam', 'Frodo', 'Pippin', 'Galadriel', 'Merry', 'Gandalf'}

[elizastuglik]

my_set = { "Frodo", "Sam", "Saruman", "Pippin", "Merry", "Galadriel", "Gandalf"}

[tommasobattisti]

my_set will contain 'Sam', 'Gandalf', 'Galadriel', 'Frodo', 'Saruman', 'Pippin' and 'Merry'

[martasoricetti]

[OrsolaMBorrini]

my_set = {"Bilbo", "Frodo", "Sam", "Pippin", "Merry"}

my_set.remove("Bilbo")
# my_set = {"Frodo", "Sam", "Pippin", "Merry"}

my_set.add("Galadriel")
# my_set = {"Frodo", "Galadriel", "Sam", "Pippin", "Merry"} or my_set = {"Frodo", "Sam", "Pippin", "Galadriel", "Merry"} or the other possible combinations
# The position of the new element "Galadriel" is irrelevant as the elements in a set are unordered

my_set.update(set({"Saruman", "Frodo", "Gandalf"}))
# my_set = {"Frodo", "Galadriel", "Sam", "Gandalf", "Saruman", "Pippin", "Merry"}

[Bianca-LM]

my_set.remove("Bilbo")
#now my_set = {"Frodo", "Sam", "Pippin", "Merry"}. It has been removed the only possible occurence of Biblo, 
#because the same element can't be in the set more than one time

my_set.add("Galadriel")
#"Galadriel" is added to the set in a not fixed position, established by any order, 
#so my_set = {"Frodo", "Sam", "Pippin", "Merry", "Galadriel"}

​my_set.update(set({"Saruman", "Frodo", "Gandalf"}))
#"Saruman" and "Gandalf" are added to the set as "Galadriel" previously. "Frodo" is already contained and 
#it can't be added more than one time. Now my_set = {"Frodo", "Sam", "Pippin", "Merry", "Galadriel", "Saruman", "Gandalf"}

[giorgimariachiara]

my_set = {"Frodo", "Sam", "Pippin", "Merry", "Galadriel", "Saruman", "Gandalf"}

[olgagolgan]

[GinevraBotto]

‘’’
my_set.remove("Bilbo")
#We are removing Bilbo from the list

Set={'Frodo', 'Merry', 'Pippin', 'Sam'}

my_set.add("Galadriel")
Set={'Frodo', 'Merry', 'Galadriel', 'Pippin', 'Sam'}

my_set.update(set({"Saruman", "Frodo", "Gandalf"})).

Set={'Frodo', 'Merry', ‘Galadriel’, 'Pippin', 'Sam', 'Saruman', 'Gandalf' } #frodo just one time because a set has no-repeatable elements

‘’’

[ManueleVeggi]

The set is composed by the followings strings: "Frodo", "Merry", "Pippin", "Sam", "Bilbo".

Command	Updated status
my_set.remove("Bilbo")	"Frodo", "Merry", "Pippin", "Sam"
​my_set.add("Galadriel")	"Frodo", "Merry", "Pippin", "Sam", "Galadriel"
my_set.update(set({"Saruman", "Frodo", "Gandalf"}))	"Frodo", "Merry", "Pippin", "Sam", "Galadriel", "Saruman", "Gandalf"

[francescabudel]

lotr_set = set()
lotr_set.add("Bilbo")
lotr_set.add("Frodo")
lotr_set.add("Sam")
lotr_set.add("Pippin")
lotr_set.add("Merry")
lotr_set.remove("Bilbo")
lotr_set.add("Galadriel")
lotr_set.update(set({"Saruman", "Frodo", "Gandalf"}))

print(lotr_set)

{'Saruman', 'Pippin', 'Gandalf', 'Sam', 'Frodo', 'Merry', 'Galadriel'}

[SaraVell1]