Module 4: Strings and Lists are iterables

Question 1

A _______ is a collection of items in some order.

Answer 1

sequence

Question 2

A string is a ______ meaning it is an ordered collection of other values.

Answer 2

sequence

Question 3

Access characters of a string one at a time using _______.

Answer 3

bracket operator

Question 4

expression in [ ] brackets is _______ and starts at ______.

Answer 4

index, 0

Question 5

value of an index must be _______.

Answer 5

integer

Question 6

______ is a built in function that returns number of characters in a string.

Answer 6

len(stringname)

Question 7

to get last digit of word from index use [ ______ ] or [ ______ }

Answer 7

1. first: length = len(fruit)
   last length-1
2. [-1]

Question 8

A _____ is a segment of a string

Answer 8

slice

Question 9

select a slice using [ _______ ]

Answer 9

n:m
:m or n:

Question 10

A _______ is a pattern that starts at the beginning, select each character in turn, do something to it, and continue until the end.

Answer 10

traversal

Question 11

strings are _______ meaning you cannot change an existing string and cannot use [ ] on the left side of assignment.

Answer 11

immutable

Question 12

A ______ is the pattern of computation of traversing a sequence and returning when we find what we are looking for.

Answer 12

search

Question 13

A list is a sequence of _______. In a string values are _______, in a list they are _______.

Answer 13

values, characters, any/elements/items

Question 14

empty list is given by ______

Answer 14

[ ]

Question 15

variables can be ________ list values

Answer 15

assigned

Question 16

syntax for accessing elements of a list is ______ as for accessing characters of a string

Answer 16

the same

Question 17

unlike strings, lists are ______, meaning they can be _______

Answer 17

mutable, changed

Question 18

A ______ is commonly used to traverse the elements of a list

Answer 18

for loop

Question 19

range(n) returns a sequence of n number from ____ to ____

Answer 19

0 to n-1

Question 20

A for loop over an _____ never runs the body.

Answer 20

empty list

Question 21

______ takes a value and mutates the list, adding the new element to the end

Answer 21

listname.append(value)

Question 22

______ takes a list and mutates the first list, appending all the values in the second list to it.

Answer 22

firstlistname.extend(secondlistname)

Question 23

_____ returns another list containing all the same items. It takes ________ arguments.

Answer 23

firstlistname.copy()
no

Question 24

______ modifies the list and returns the element that was removed. if an index isnt provided it deletes and returns the last element.

Answer 24

firstlistname.pop(#)

Question 25

use _____ to convert from a string to a list of characters

Answer 25

list(nameofstring)

Question 26

use ______ to break a string into words

Answer 26

firstlistname.split(delimiter) can use ( ) instead where it will split at spaces

Question 27

______ is an optional argument that specifies which characters to use as word boundaries

Answer 27

delimiter

Question 28

_________ takes a list of strings and concatenates the elements. must invoke it on the delimiter and pass the list as a parameter.

Answer 28

delimiter.join(firstlistname)

Question 29

______ data types cannot be changed and include _____, ______, _______.

Answer 29

immutable, int, float, str

Question 30

use _____ to check whether two variables refer to the same object

Answer 30

is

Question 31

a ________ is the association of a variable with an object

Answer 31

reference

Question 32

if an aliased object is mutable, changes made to one alias will _______

Answer 32

affect the other

Question 33

a tuple is like a list but is _______

Answer 33

immutable

Question 34

strings, lists, and range objects are all ________

Answer 34

iterables

Question 35

The first value for index is _______ and the last is _______.

Answer 35

0 length - 1

Question 36

the len function returns type _______.

Answer 36

int

Question 37

To create a boolean expression using in write _______, ________, ________.

Answer 37

value, in, iterable such as str or list

Question 38

Use [_____:______:______] to go through a list/string while selecting only certain values.

Answer 38

start stop step

Question 39

in an index _______ returns the last value

Answer 39

-1

Question 40

Create a tuple using _______ brackets. For a tuple with only one object add a _______ after the object. Can convert _______ or _______ to a tuple by _______.

Answer 40

round ( ) , string list tuple("string") or tuple([list])

Question 41

compared to a list which has _______ argument, a tuple has ________ argument.

Answer 41

1 many