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"})).

[lisitein]

my_set = set()
my_set.update(Hobbits)
my_set.remove("Bilbo")
print(my_set)
# {'Sam', 'Merry', 'Pippin', 'Frodo'}
my_set.add("Galadriel")
print(my_set)
# {'Sam', 'Merry', 'Pippin', 'Galadriel', 'Frodo'}
my_set.update(set({"Saruman", "Frodo", "Gandalf"})) 
print(my_set)
# {'Sam', 'Merry', 'Saruman', 'Gandalf', 'Pippin', 'Galadriel', 'Frodo'}

[KikaYang]

[yutong316]

[rumana-mh]

I didn't add the extra "set " parenthesis in the last line of instructions and the code worked.. But I was wondering if there was any reason why you added it.. or is it correct as well?

[maridematteis]

[shiho1000]

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

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

[arinee01]

[ValkyrieCain9]

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

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

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

[martinamrc]

my_set.remove('Bilbo')      # after this the element 'Bilbo' from the set will be removed 
my_set.add('Galadriel')       # after this the element 'Galadriel' will be added to the set
my_set.update(set({"Saruman", "Frodo", "Gandalf"}))       # this will update my_set with the elements of the new set, but one, which is 'Frodo', since the element would be repeated

print(my_set)

[theair-hub]

[Maryamdadras]

#Step 1
my_set = {"Bilbo", "Frodo", "Sam", "Pippin", "Merry"}
print(my_set)
#out put: {'Bilbo', 'Frodo', 'Sam', 'Pippin', 'Merry'}

#Step 2: remove "Bilbo"
my_set.remove("Bilbo")
print(my_set)
#out put: {'Frodo', 'Sam', 'Pippin', 'Merry'}

#Step 3: add "Galadriel"
my_set.add("Galadriel")
print(my_set)
#out put: {'Frodo', 'Sam', 'Pippin', 'Merry', 'Galadriel'}

#Step 4: update with {"Saruman", "Frodo", "Gandalf"}
my_set.update({"Saruman", "Frodo", "Gandalf"})
print(my_set)
#out put: {'Frodo', 'Sam', 'Pippin', 'Merry', 'Galadriel', 'Saruman', 'Gandalf'}

[ERendall]

[nicoldamelio]

[martinaucch]

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

[romashovar]

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