Topic 4

Question 1

primative data type examples

Answer 1

int, float, bool, string

Question 2

non-primative data type examples

Answer 2

tuple, list, set, dictionary

Question 3

behaviour of tuple

Answer 3

ordered sequence of items
defined using () around sequence of items
immutable (can’t be reassigned)
can hold any data type + mix types
can be iterated over

Question 4

behaviour of lists

Answer 4

ordered sequence of items
defined using [] around sequence of items
mutable (can be reassigned)
can hold any data type + can mix but usually doesn’t
can be iterated over
can do indexing and slicing

Question 5

behaviour of set

Answer 5

unordered sequence of unique items
defined using {} around sequence of items
immutable (can’t be reassigned)
can hold mixed data types
can be iterated over

Question 6

behaviour of dictionary

Answer 6

ordered sequence of key:value pairs/ items
defined using dict () around sequence of key-value pairs or {} for empty dict
mutable (can’t be reassigned) but keys must be unique and immutable
values can be any data type
can be iterated over

Question 7

common use of tuples

Answer 7

return multiple values from a function
for data of constant structure (order has meaning + consistency)
swapping of variables without using temporary variable

Question 8

indexing

Answer 8

accessing a specific item

Question 9

my_list[i]

Answer 9

Returns item i in the list (indexing above)

Question 10

my_list[0]

Answer 10

First item in the list

Question 11

my_list[-1]

Answer 11

Last item in the list

Question 12

slicing

Answer 12

accessing parts of the list

Question 13

my_list[start:stop:stride]

Answer 13

Items from start to stop-1
with step size of stride

Question 14

my_list[start:stop]

Answer 14

Items from start to stop-1, stride

Question 15

my_list[start:]

Answer 15

Items from start to rest of list

Question 16

my_list[:stop]

Answer 16

Items from beginning through stop-

Question 17

my_list[::stride]

Answer 17

Every stride item of the whole list;
negative stride -> counts from end

Question 18

cloning

Answer 18

creating a shallow copy of the list
my_list[::]
my_list[:]

Question 19

methods

Answer 19

functions that are linked to a particular object

Question 20

“removing items” from list methods

Answer 20

pop or remove
pop: removes item with (insert index) or last item if () empty
remove: removes given value

Question 21

split and join method in strings

Answer 21

can convert string to a list by separating string on a string parameter using (“ “)
or turn list of strings into a string by combining each item with a string separator

Question 22

method syntax

Answer 22

<object_name>.<method_name>(<parameters>)
</parameters></method_name></object_name>

Question 22

my_set =

Answer 22

{1, 2, 3.14, “word”, False}
can be anything

Question 22

my_dict =

Answer 22

{“name” : “Magnus”, “age” : 25}
key : value (item pair), key : value (item pair)

Question 22

student_dict =

Answer 22

dict(zip(names, ages)
e.g. {‘Bob’: 24, ‘Kenneth’: 27, ‘Alice’: 22, ‘Amelie’: 45}

Question 22

empty_set =

Answer 22

set()

Question 23

use of in operator

Answer 23

to iterate through an iterable
to check if a value is present in an iterable