Chapter 12: Tuples

Question 1

Lists are “ “ while tuples are “ “

Answer 1

Lists are mutable while tuples are immutable

Question 2

What is the following action called?
tuple(“Safari”)
(‘S’, ‘a’, ‘f’, ‘a’, ‘r’, ‘i’)

Answer 2

Unpacking

Question 3

What will happen in the following code?
num = (1, 2, 3, 4)
a, *b, c = num
print(a, b, c)

Answer 3

Adding * to b will create a list in the middle section.
»>print(a, b, c)
1 [2, 3] 4

Question 4

How do you delete an item in a tuple?

Answer 4

You can’t. Tuples are immutable. You can, however, delete the entire tuple using the del tuple method.

Question 5

I want to count how many times the number 3 shows up in the below tuple. How can I do this?

tuple1 = (1, 2, 3, 4, 3, 3, 3, 3, 66)

Answer 5

By using the count function.
»> tuple.count(3)
4

Question 6

What if I want to find the max number listed in a tuple?

Answer 6

Use the max function.
»> tuple1 = (1, 4, 90, -177, 43)
»> max(tuple1)
90

Question 7

How could I change a list to a tuple?

Answer 7

Using the tuple(list) method
»> my_list = [1, 2, 3, 4]
»> my_list = tuple(my_list)
»> my_list
(1, 2, 3, 4)

Question 8

Consider the below code:
»> my_tuple = ([“Hello”, “World”], [“It’s”, “nice”])
Can we edit the list in this tuple?

Answer 8

Yes. By using append or remove.
»> my_tuple[0].append(“hello”)
»>print(my_tuple)
([“Hello”, “World”, “hello”], [“It’s”, “nice”])

or
»> my_tuple[0].remove(“hello”)
»>print(my_tuple)
([“Hello”, “World”], [“It’s”, “nice”])

Question 9

What will the output be for the following code?
»> my_tuple = ([“Hello”, “World”], [“It’s”, “nice”])
»> my_tuple.append([‘x’, ‘y’, ‘z’])
print(my_tuple)

Answer 9

You will receive an attribute error. Since we are trying to modify the tuple and not the list we will get the following: AttributeError: ‘tuple’ object has no attribute to ‘append’

Question 10

” “ is a built-in function that takes two or more sequences and returns a list of tuples where each tuple contains one element from each sequence.

Answer 10

zip

Question 11

I want a sequence of tuples where each tuple is a key-value pair, how would I accomplish this? Hint: dictionary method

Answer 11

By using items which returns a sequence of tuples
tuple is a key-value pair.
»> d = {‘a’:0, ‘b’:1, ‘c’:2}
»> t = d.items()
»> t
dict_items([(‘c’, 2), (‘a’, 0), (‘b’, 1)])

Question 12

True or False
Can you use a list of tuples to initialize a dictionary?

Answer 12

True
»> t = [(‘a’, 0), (‘c’, 2), (‘b’, 1)]
»> d = dict(t)
»> d
{‘a’: 0, ‘c’: 2, ‘b’: 1}

Question 13

In some context, like a “ “ statement, it is syntactically simpler to create a tuple than a list.

Answer 13

return

Question 14

Lists, dictionaries and tuples are examples of what?

Answer 14

data structures

Question 15

An assignment with a sequence on the right side and a tuple of variables on the left. The right side is evaluated and then its elements are assigned to the
variables on the left.

Answer 15

tuple assignment

Question 16

The operation * of assembling a variable-length argument tuple.

Answer 16

gather

Question 17

The operation of treating a sequence as a list of arguments.

Answer 17

scatter

Question 18

The result of calling a built-in function zip; an object that iterates through a
sequence of tuples.

Answer 18

zip object

Question 19

An object that can iterate through a sequence, but which does not provide list
operators and methods.

Answer 19

iterator

Question 20

A collection of related values, often organized in lists, dictionaries, tuples,
etc

Answer 20

data structure

Question 21

An error caused because a value has the wrong shape; that is, the wrong type or size.

Answer 21

shape error