Unit Two (it's not wraps...yet)

Question 1

Command to switch a number to an integer?

Answer 1

int()

Question 2

What is a “float”

Answer 2

a number that has a decimal (can be .0)

Question 3

What is the float command in Python? What do you type in do get the float command in python?

Answer 3

float()

Question 4

What are strings and what is the command for strings?

Answer 4

They are sequences of character data. the command is str()

Question 5

What are two ways to have a quote inside a quotation?

Answer 5

Either using:
Double quotes: “ “” “
or
A backslash: “John/’s meal”

Question 6

What does the backslash do in Python?

Answer 6

• can break up lines
• negates anything after it in a string

Question 7

How is tab expressed in Python?

Answer 7

\t

Question 8

What does \t do in python

Answer 8

tab

Question 9

What is a raw string and how is it denoted?

Answer 9

a raw string disregards any escape sequences (ei “") that may come after it

it is formatted as such: print(r’john//’)

john//

Question 10

What do triple-quoted strings do?

Answer 10

They can be used interchangeably with the backslash

Question 11

What is boolean ?

Answer 11

True and False

Question 12

absolute value function

Answer 12

abs()

Question 13

What command is used to convert to a boolean value?

Answer 13

bool()

Question 14

What function checks the type of a value?

Answer 14

type()

Question 15

What function checks the length of a function?

Answer 15

len()

Question 16

What function creates a list?

Answer 16

list()

Question 17

What function sends a message to the user and receives a message?

Answer 17

input()

Question 18

What does the != function mean?

Answer 18

not equal to

Question 19

What needs to go in the square brackets?

print( {[ ]”Hello {name}’)

Answer 19

f

Question 20

if
n = 300
and
m = n

does m = 300?

Answer 20

no because the identity codes will be different

Question 21

can the first letter of a variable be a number ?

ex: 32goober

Answer 21

no

Question 22

what are the three types of cases for variables and what do they mean?

Answer 22

camel case - has capitalized words not first word though (camel - capitalized)

pascal case - has the first letter capitalized

snake case - words are separated by underscores

Question 23

what does a modulo look like and do?

Answer 23

%

finds the remainder of two values

Question 24

What is floor division and how is it expressed?

Answer 24

//

divides two numbers and rounds down

Question 24

What issues does "< tolerance" fix

Answer 24

it fixes the issues when two floats are combined (in some way) it negates pythons habit of reading 1.1 as 1.1000000001 therefore saying "close enough"

Question 25

When "or" is used, how many trues does there need to be for the output to be true ?

Answer 25

one or more

Question 25

How many falses in needed for a "and" output to be false

Answer 25

one or more - regardless of the amount of True statements

Question 25

if brackets are empty, is this considered "truthly" or "falsely" ? ex: [ ]

Answer 25

falsely

Question 26

if something is in brackets regardless of what it is, (besides a space) is this "truthly" or "falsely"

Answer 26

truthly

Question 27

What function checks the truthliness of an object?

Answer 27

bool()

Question 28

is a 0 value true or false ?

Answer 28

false

Question 29

is a non-zero true or false?

Answer 29

true

Question 30

what does a += 5 mean

Answer 30

a = a +5

Question 31

what does a /= 10 mean

Answer 31

a = a / 10

Question 32

what does a ^= 10 mean

Answer 32

a = a ^ b

Question 33

Is it possible to multiply strings? If yes, how is this done?

Answer 33

it can be done using * s= 'foo' print(3 * s) 'foofoofoo'

Question 34

What happens if you try to multiply strings with a negative number

Answer 34

you get a blank output (NOT AN ERROR!)

Question 35

What happens if you try to multiply strings with a float

Answer 35

will result in an error

Question 36

what does ord() do?

Answer 36

it is the opposite of chr() and outputs the number value when given a string

Question 36

what does the function chr() do?

Answer 36

checks what a number represents and outputs the corresponding string value a = 97 chr(97) a

Question 37

what is string indexing?

Answer 37

refers to assigning values to letters in a string : f o o b a r 0 1 2 3 4 5

Question 38

What is the 0th letter?

Answer 38

the technical "first" letter

Question 39

what is 'string slicing' ?

Answer 39

breaking down the index of the string by using a colon to denote which values of the string something is referencing s = 'foobar' f o o b a r 0 1 2 3 4 5 s[2:5] 'oba'

Question 40

Is the second boundary ever included in string slicing? ex: s[3:6] -would the sixth value be included

Answer 40

no, the second boundary is never included

Question 41

is zero needed before the colon in string slicing? ex: [:4]

Answer 41

no _:and 0: mean the same thing

Question 42

is an end value needed if the string slicing is wanted to be done to the end of the string? ex s[2:]

Answer 42

no, they mean the same thing

Question 43

true or false: s[2:len(s)] means to go the end of the string

Answer 43

true

Question 44

yes or no: does the first boundary in string slicing need to be lower than the second boundary?

Answer 44

yes

Question 45

how do negative values work in string slicing?

Answer 45

same as postive integers just reverse - see example below -6 -5-4 -3 -2 -1 f o o b a r 0 1 2 3 4 5

Question 46

what is a 'stride' in string slicing?

Answer 46

a command that count the term ever n number of terms s[::5] - counts the term every 5 terms

Question 47

what effect does a negative number have on stride string slicing?

Answer 47

it reverses the order and starts at the last letter racecar -> racecar

Question 48

What does immutable mean?

Answer 48

means you can change the value of a term/letter

Question 49

Are strings immutable?

Answer 49

yes, strings are immutable - their values cannot be changed

Question 50

Are lists immutable or mutable ?

Answer 50

mutable. Individual term values can be changed

Question 51

What are the first 3 facts about python lists?

Answer 51

1. They are ordered 2. They can contain arbitrary objects 3. Elements can be accessed by the index

Question 52

What are the last three facts about python lists?

Answer 52

4. Can be nested 5. Are mutable 6. They are dynamic

Question 53

All 6 facts about python lists?

Answer 53

1. They are ordered 2. They can contain arbitrary objects 3. Elements can be accessed by the index 4. Can be nested 5. Are mutable 6. They are dynamic