Intro To Lists

Question 1

How do you create a list?

Answer 1

Square brackets [ ]

Question 2

Every item in a list is a (blank), so each should be enclosed with a (blank)

Answer 2

Python string
Quotation mark

Question 3

Name 3 things a “[ ]” will make it easier to do.

Answer 3

1. Get an item at a specified position (1st, 2nd, 3rd etc)
2. Check the number of items
3. Add/remove items

Question 4

How would you count the number of entries in a list?

Answer 4

len()

Question 5

Referring to any item in the list according to its position in the list is called what?

Answer 5

Indexing

Question 6

How would you pull the first entry in a list?

Answer 6

[0]

Question 7

How would you pull the second entry in a list?

Answer 7

[1]

Question 8

How would you pull the last entry in a list?

Answer 8

Use one less than the length of the list

(e.g if the length of list is 10, index using 9)

Question 9

How would you print multiple strings in Python with a single command?

Answer 9

Separate them with a comma

Question 10

Pulling a segment of list is called?

Answer 10

Slicing

Question 11

To pull the first 3 items in a list what would you use?

Answer 11

[ :3]

Question 12

If you wanted the last 4 items in a list what would you use?

Answer 12

[-4: ]

Question 13

How would you remove an item from a list?

Answer 13

.remove()

Question 14

How would you add an item to a list?

Answer 14

.append()

Question 15

What does this tell you?

print(“blank:” , sum(hardcover_sales[ :5]) /5)

Answer 15

You want to take the hardcover sales in first five days and divide it by 5

Question 16

What does split() method do?

Answer 16

Splits a string into a list

Question 17

How would you quickly turn a string into a list?

Answer 17

.split()

Question 18

Indexing is used to

Answer 18

Obtain individual elements

Question 19

Slicing is used to

Answer 19

Obtain a sequence of elements

Question 20

Lists in Python represent what?

Answer 20

Ordered sequences of values

Question 21

How would you access an element at the end of the list?

Answer 21

[-1]

Question 22

How would you express wanting all the letters from index 3 onward?

[‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’, ‘h’, ‘i’, ‘j’, ‘k’]

Answer 22

Letters[3:]

Question 23

Strings will be sorted how?

Answer 23

Alphabetically

Question 24

Numbers are sorted how?

Answer 24

Numerically

Question 25

A function attached to an object is called a what?

Answer 25

Method

Question 26

Non-function things attached to an object, such as imag, are called what?

Answer 26

Attributes

Question 27

What is an imag

Answer 27

An imaginary part of a #

Question 28

What does list.pop do?

Answer 28

Removes and returns the last element of a list

Question 29

Returns the index number at which a particular element appears in a list

Answer 29

list.index

Question 30

To avoid surprises, what will the ‘in’ operator determine?

Answer 30

Whether a list contains a particular value

“Earth” in planets

True

Question 31

How do you create a tuple?

Answer 31

() parenthesis

Question 32

Are tuples immutable?

Answer 32

Yes meaning they cannot be modified