Python

Front 1

Line of code that will output: Hello, World!

Back 1

print ('Hello, World')

Front 2

Use _________ to determine which operations are performed first

Back 2

Parenthesis

Front 3

Using a / for division produces a _______.

Back 3

Float

Front 4

A float is a number with a _______.

Back 4

Decimal

Front 5

Computers can't store ______ completely accurately, which can lead to bugs.

Back 5

Floats

Front 6

What are 3 ways a float can be produced?

Back 6

float()

Running an operation on two floats

Running an operation on a float and an integer

Front 7

How do you perform exponentiation?

Back 7

Two asterisks - (Base**Exponent)

Front 8

Create a sting by putting _______ between ' or " marks.

Back 8

Text

Front 9

How do you include a character that can't be directly included in a string? Ex: a double quote

Back 9

Use a backslash

Front 10

\n represents a ___ ______.

Back 10

New Line

Front 11

___ is automatically put in the output, where you press Enter. IF you put your string inside of _ sets of quotes.

Back 11

\n , 3

Front 12

A program takes _____ to produce ______

Back 12

Input, output

Front 13

You can use the ____ function to produce output.

Back 13

Print

Front 14

How do you prompt the user for input?

Back 14

raw_input('prompt')

Front 15

User input is automatically returned as a ______. (With the contents automatically escaped.)

Back 15

String

Front 16

As with integers and floats, _______ in Python can be added, using a process called __________.

Back 16

strings, concatenation

Front 17

To add a string that contains a number to an integer you must first __________________.

Back 17

Convert the string to an integer

Front 18

You can multiply a string by an integer. (T or F)

Back 18

True

Front 19

You can multiply a string by a float. (T or F)

Back 19

False

Front 20

what is the output of this code:

print(3 * '7')

Back 20

777

Front 21

How do you convert the string "83" into the integer 83?

Back 21

int("83")

Front 22

How do you convert the integer 7 into the float 7.0?

Back 22

float(7)

Front 23

How do you convert the integer 83 into the string '83'

Back 23

str(83)

Front 24

What is the output of this code and why?

int('6'+'3')

Back 24

63 , because the operation inside the parenthesis is done first and while '6' and '3' are inside the parenthesis they are strings so their sum is '63', which is THEN converted into the integer 63

Front 25

How do you convert user input (which is automatically a string) into an integer?

Back 25

int(raw_input("prompt:"))

Front 26

A _______ allows you to store a value by assigning it to a name.

Back 26

Variable

Front 27

To assign a variable use an ____ sign

Back 27

=

Front 28

Variables can be reassigned as many times as you want. (T or F)

Back 28

True

Front 29

You can assign a variable to an integer and then later assign that same variable to a string. (T or F)

Back 29

True

Front 30

The only characters allowed in a variable name are:

Back 30

Letters, Numbers, Underscores

Front 31

is 13_Hab an acceptable variable name?

Back 31

No, variable names cannot begin with numbers

Front 32

Variable names are _____ sensitive.

Back 32

case

Front 33

How do you delete a variable?

Back 33

del variable name

Front 34

You can also take the value of the variable from user input. (T or F)

Back 34

True

Front 35

In-place operators allow you to write code like

'x = x + 3' more concisely, as:

Back 35

x + = 3

Front 36

What is the output of this code?

>>> x = 3

>>> num = 17

>>> print(num % x)

Back 36

2 (remainder)

Front 37

What are the two Boolean values in python?

Back 37

True and False

Front 38

What is the Boolean equal operator in python?

Back 38

==

Front 39

What is this Boolean operator? !=

Back 39

Not equal to

Front 40

Is this a true or false statement?

1 != 1

Back 40

False

Front 41

Is this a true or false statement?

2 != t

Back 41

True

Front 42

What are the Boolean operators for greater than / less than?

Back 42

> <

Front 43

What are these Boolean operators?

<= >=

Back 43

Greater than / less than (or equal to)

Front 44

(T or F)

The > < operators can be used to compare two strings lexicographically

Back 44

True

Front 45

You can use an __ ________ to run code if a certain condition holds

Back 45

if statement

Front 46

Python uses ______ to delimit blocks of code

Back 46

Indentation

Front 47

The end of an if statement should contain a _.

Back 47

:

Front 48

If statements can be _______ to perform more complex checks. This is one way to see if ______________ are met.

Back 48

nested, multiple conditions

Front 49

What is the output of this code?

num = 7

if num > 3:

print("3")

if num < 5:

print("5")

if num ==7:

print("7")

Back 49

3, because since 7 is not less than 5 the next nested statement is never reached

Front 50

An else statement follows __________.

Back 50

An if statement

Front 51

An else statement contains code that is called when _____________________.

Back 51

The if statement evaluates to false

Front 52

(T or F)

Else statements must be followed by a :

Back 52

True

Front 53

The _____ statement is a shortcut to chaining if else statements.

Back 53

elif

Front 54

elif statements can have a final ________.

Back 54

Else statement

Front 55

The and operator takes two arguments and evaluates as true if _________.

Back 55

both arguments are true

Front 56

The or operator takes two arguments and evaluates to true if ______________.

Back 56

Either (or both) arguments is/are true.

Front 57

The operator not only takes one argument and _________ it.

Back 57

Inverts

Front 58

Each character inside of a sting has a number, this number is called the _____

Back 58

index

Front 59

what is the output of:

'python'[2]

Back 59

t (always begin counting from 0)

Front 60

what does the string function .len() do?

Back 60

Gives you the number of characters in the string.

(length)

Front 61

write a line of code that gets rid of all capitalization in the variable named parrot

Back 61

parrot.lower()

Front 62

What will this line of code do?

"parrot".upper()

Back 62

Make all letters in the string "parrot" uppercase

Front 63

str() turns _______ into ________

Back 63

non-strings into strings

Front 64

Methods using dot notation (such as "String".upper() ) only work with _________.

Back 64

Strings

Front 65

(T or F)

When you want to print a variable inside of a string, the best way is concatenation

Back 65

False

Front 66

What is the output of this code?

string_1 = "Camelot"

string_2 = "place"

print "Let's not go to %s. 'Tis a silly %s." % (string_1, string_2)

Back 66

Let's not go to Camelot. 'Tis a silly place.

Front 67

use the % operator to replace the__ placeholders with the variables in parentheses.

Back 67

%s

Front 68

what is missing?

a=apples

b=titties

print "do you prefer %s or %s ?" ___ ( a , b )

Back 68

%

Front 69

According to operator precedence what is the output of this code?

if 1 + 1 * 3 == 6:

print("Yes")

else:

print("No")

Back 69

No

Front 70

What are the 5 basic categories of statements that programming languages have.

Back 70

1.) Conditional

2.) Looping

3.) Function

4.) Assignment

5.) Declaration

Front 71

______ = 5.0 / 3.0 * 6.0

Back 71

10.0

Front 72

When a function is executed, what happens when the end of the function statement block is reached?

Back 72

Execution returns to the statement that called it.

Front 73

For a function to be used in an expression, it must _____________ .

Back 73

Return a Value

Front 74

A __________ is the part of a program in which a variable may be accessed.

Back 74

Scope

Front 75

while in a loop, a _____________ command allows to to exit before the completion of the loop

Back 75

Break

Front 76

A simple conditional statement taught in this course starts with the key word _____ .

Back 76

if

Front 77

What are two keywords used to start loop (repeating) statements in Python 2.7?

Back 77

For & While

Front 78

A loop that repeats a specific number of times is know as a(n)_________________.

Back 78

Count controlled loop

Front 79

What value will be printed after this code in run?x = 12

y = 10

y += 15

myvar = x + y

print myvar

Back 79

37

Front 80

______________ gives us this ability to choose among outcomes based off what else is happening in the program.

Back 80

Control flow

Front 81

evaluate

not 41>40

Back 81

False

Front 82

evaluate

not 65 < 50

Back 82

True

Front 83

evaluate

not not 50 != 50

Back 83

False

Front 84

What is the order of operations for boolean operators?

Back 84

1.) not

2.) and

3.) or

Front 85

an __/_____ statement says "If this expression is true, run this indented code block; otherwise, run this code after the else statement."

Back 85

if/else

Front 86

use _________ to determine if a string is letters.

Back 86

STRING.isalpha()

Front 87

Create a line of code that checks if user input has more than 0 characters AND is all letters

Back 87

if len(INPUT) > 0 and INPUT.isalpha()

Front 88

when selecting a section of a string that should include the end, for the second index you can use .len() or you can ______.

Back 88

Leave second index blank

Front 89

(T or F)

False or not 3 <= 5 * 2

Back 89

False

Front 90

How do you use pi?

Back 90

from math import pi

Front 91

How do you use the sleep function?

Back 91

from time import sleep

Front 92

Write some code that will print the current date and time

Back 92

from datetime import datetime

now = datetime.now()

print now

Front 93

How do you print a float to the second decimal place using string formatting?

Back 93

%.2f

Front 94

How do you insert a float using string formatting?

Back 94

%f

Front 95

What are the 3 general parts of a function?

Back 95

1.) Header (includes 'def')

2.) Comment (optional)

3.) body (indented)

Front 96

what is n?

def square(n):

Back 96

a parameter, which acts as a variable name for a passed in argument.

Front 97

T or F

You can call another function from within a function

Back 97

True

Front 98

What does this code do?

def cube(number):

return number**3

def by_three(number):

if number % 3 == 0:

return cube(number)

else: return False

Back 98

when cube is called it will return the cube of the number.

when by_three is called it will return the number cubed IF the number is divisible by three

Front 99

Write a line of code that prints the square root of 25 using built in functions

Back 99

import math

print math.sqrt(25)

Front 100

How do you import just one function from a module?

Back 100

from module import function

Front 101

What if you want all of the math functions but don't want to keep typing in ' math. ' before calling each function, what can be done?

Back 101

from math import *

(Universal import)

Front 102

Why is it not always a good idea to use a universal import?

Back 102

if you have functions named the same as the functions in the module it can confuse the program.

Front 103

What will this code return?

max( 2 , 6 , 9, -10)

Back 103

9

Front 104

What is the absolute value function?

Back 104

abs()

Front 105

what does the type() function do?

Back 105

returns the data type of the argument:

(str, int, float)

Front 106

abs() is part of the math module (T or F)

Back 106

False

Front 107

(T or F)

it is acceptable to call a function with a different variable name than the one used when the function was originally created

Back 107

True

Front 108

What will this code do?

from random import randint

randint(1,99)

Back 108

give you a random integer between 1 and 99

Front 109

%d prints ______ as %s prints strings

Back 109

Integers

Front 110

A list goes between _______ separated by ______

Back 110

Brackets , commas

Front 111

(T or F)

A list is a data type

Back 111

True

Front 112

You can access a certain element of a list by its ________

Back 112

Index

Front 113

Computer scientists love to start counting from ____

Back 113

0

Front 114

How do you assign a new element to a specific index in list?

Back 114

list_name[desired index] = entry

Front 115

what does the append function do when used in a list?

Back 115

Adds the appended element to the end of the list

Front 116

How do you append an element to a list?

Back 116

list_name.append("New Element")

Front 117

How do you take just the portion of this list between the second and third positions?

letters = ['a', 'b', 'c', 'd', 'e']

*remember to begin counting at 0 and that the number after the colon is NOT included

Back 117

portion = letters[1:3]

Front 118

what can you use to find the index of a certain element in a list?

Back 118

list_name.index("element")

Front 119

How would you insert the item "Blue" as the second item in the list named colors?

Back 119

colors.insert(1,"Blue")

Front 120

if you want to do something with every item in a list you can use a ___ ______.

Back 120

For Loop

Front 121

How do you use a for loop for every item in a list?

Back 121

for item in list_name:

Front 122

how can you alphabetically or numerically sort a list?

Back 122

list_name.sort()

Front 123

Dictionaries are enclosed in __.

Back 123

{}

Front 124

When accessing a value from a dictionary you use a ___ instead of an index

Back 124

Key

Front 125

(T or F)

When accessing a value from a dictionary you use curly brackets.

Back 125

False, use [] brackets as in a list

Front 126

(T or F)

You can put lists inside of dictionaries

Back 126

True

Front 127

How is a dictionary formatted?

Back 127

{ 'Key' : value , 'Key2' : value }

Front 128

How do you add a new key-value pair to a dictionary?

Back 128

dictionary_name['Key'] = Value

Front 129

How would you delete the key-value pair with the key "Blue" in the dictionary "Colors"

Back 129

del colors['Blue']

Front 130

How do you remove an item from a list?

Back 130

list_name.remove('item')

Front 131

(T or F)

you can use a for loop on a dictionary.

Back 131

True

Front 132

(T or F)

Dictionaries are oredered

Back 132

False, dictionaries are unordered

Front 133

(T or F)

You can access the key and the value of a dictionary with a for loop

Back 133

True

Front 134

You can use a for loop on a string to perform an action on ____________ in the string.

Back 134

every character

Front 135

What does this code do?

def compute_bill(food):

total = 0

for n in food:

total += prices[n]

return total

Back 135

1.) defines a function called compute_bill that takes an argument called 'food'

2.) sets the variable 'total' to 0

3.) for every item in the list 'food' it will find that item by key in the dictionary 'prices' and add its value to the other items in the 'food' list

4.) prints result

Front 136

What will this code print?

my_dict = {"shirts": 5, "pants": 4, "shoes": 2}

print my_dict["pants"]

Back 136

4

Front 137

List_name[a:b] will return the portion of list_name starting ____ the index a and ending ____ the index b.

Back 137

With, before

Front 138

(T or F)

items in a list must be inside of quotes

Back 138

False

Front 139

When you divide an integer by an integer the result is always a ______ _________ down

Back 139

integer rounded

Front 140

What does this .pop() function do?

listname.pop(x)

Back 140

removes the item at index x and returns list

Front 141

what does this .remove() function do?

listname.remove(x)

Back 141

remove the actual item x if it finds it

Front 142

what is the function which removes the item at the given index from the list but does not return the list?

Back 142

del(listname[index])

Front 143

Besides using a for loop, how can you iterate through items in a list?

Back 143

Using the range function

Front 144

use the range function to perform the same task on a list as the ## for item in list: function

Back 144

for i in range(len(list)):

Front 145

(T or F)

The range function must be attributed to a certain list name when used in a for loop

Back 145

False

Front 146

what will this code do?

letters = ['a' , 'b' , 'c']

print ' '.join(letters)

Back 146

will print the letters list with a space in place of the quotation marks and commas

Front 147

how do you select an element from a list within a list?

Back 147

listname[outer_list_index][inner_list_index]

Front 148

What will this code return?

my_list = [8, 6, 4, 2]

my_list.pop(1)

Back 148

[8, 4, 2]

Front 149

What will this code return?

my_list = [1, 3, 5, 7]

my_list.remove(3)

Back 149

[1, 5, 7]

Front 150

What will this code return?

my_list = [1, 2, 3, 5]

my_list[2] = my_list[1] + 2

Back 150

[1, 2, 4, 5]

Front 151

Replace the line in the function so that the functions prints every other list item.

def print_list(x):

for counter in ________________:

print x[counter]

Back 151

range(0, len(x),2)

Front 152

A while loop executes _____________________.

Back 152

WHILE a condition holds true

Front 153

What is one method for using a while loop so that it does not become infinite and iterates a certain amount of times?

Back 153

Use an increment count

Front 154

(T or F)

You can use a while / else loop

Back 154

True

Front 155

What will putting a comma after a print statement do?

Back 155

Prevent the next output from going to the next line

Front 156

When looping over the dictionary do you get the key or the value?

Back 156

you get the key which you can use to get the value.

Front 157

What built in function allows you to iterate over two lists at once?

Back 157

the zip function

Front 158

(T or F)

The zip function can handle 4 lists at once

Back 158

True

Front 159

(T or F)

The zip function will stop at the end of the longer list

Back 159

False, it will stop at the end of the shorter list

Front 160

Write an opening line of code that uses the zip function on a list called list_a and list_b

Back 160

For a , b in zip(list_a , list_b):

Front 161

how do you separate a sentence (string) into a list with each word?

Back 161

string.split()

Front 162

what will this code do?

word = 'apples'

print len(word)

Back 162

return the length of the word 'apples'

Front 163

What does the zip function do?

Back 163

It creates pairs of elements when passed two lists

Front 164

What function can be used to supply an index to each element of a list as you iterate through it?

Back 164

enumerate()

Front 165

Besides datetime what is another function you can use to obtain current time functions?

Back 165

strftime

Front 166

Write a line of code that will check the amount of keys in a dictionary

Back 166

len(dictionary.keys())

Front 167

What does the continue function do?

Back 167

Continues with the next iteration of the loop

Front 168

(T or F)

when using the .items() function on a dictionary, it will print the items (keys and values) in the order they are in the dictionary

Back 168

False

Front 169

Write a line of code that will return all the keys for a dictionary in no particular order

Back 169

dictionary.keys()

Front 170

Write a line of code that will return all the values for a dictionary in no particular order

Back 170

dictionary.values()

Front 171

what is the format for taking only certain elements from a list?

Back 171

[start:end:stride]

Front 172

How do you print a list in reverse?

Back 172

make the stride negative

[::-1]

Front 173

What is a lambda?

Back 173

an anonymous function

Front 174

what is the syntax for using a lambda?

Back 174

filter(lambda x: CONDITION , list_to_filter)

Front 175

If you want to write a number in binary what must it begin with?

Back 175

0b

Front 176

how do you convert an integer into binary?

Back 176

bin()

Front 177

What is XOR?

Back 177

Will return a true (1) if EITHER of the compared values are a one, but NOT BOTH

Front 178

What is a class?

Back 178

a way of organizing and producing objects with similar attributes and methods.

Front 179

How do you initialize the object(s) of a class?

Back 179

def __init__(self):

Front 180

What should you use as the first parameter when instantiating a class?

Back 180

self

Front 181

You can access an attribute of a class using ___ notation

Back 181

dot

Front 182

how can you give all objects of a class the same variable without actually initializing it?

Back 182

inside of the class, before __init__(), create a new variable and set it equal to the desired value

Front 183

What do you call a function inside of a class?

Back 183

A method

Front 184

(T or F)

When creating a method, you do not have to pass in the self argument if you already did so in __init__()

Back 184

False

Front 185

Write a line of code that calls the method 'description' on the object 'hippo' and prints it

Back 185

print hippo.description()

Front 186

what is inheritance?

Back 186

the process by which one class takes on the attributes and methods of another

Front 187

What does this code do?

class Triangle(Shape):

Back 187

opens a class called 'Triangle' that Inherits the class 'Shape'

Front 188

when using dot notation, does the object or the class name come first?

Back 188

object

Front 189

What does this class inherit?

class ClassName(object):

Back 189

the properties of an object, which is the simplest, most basic class

Front 190

What is a variable that is only available to a certain class called?

Back 190

A member / member variable

Front 191

An instance of a class automatically has access to what variables?

Back 191

Member variables

Front 192

This is the correct way to print the 'condition' of 'my_car'

class Car(object):

____condition = 'new'

my_car = Car()

print my_car.condition

Back 192

True

Front 193

This is the correct way to print the 'condition' of 'my_car'

class Car(object):

____condition = 'new'

my_car = Car()

print condition.my_car()

Back 193

False

Front 194

What should the first argument passed to __init__() be?

Back 194

self

Front 195

This is the correct way to initialize a class

def __init__(self, new_var):

----new_var = self.new_var

Back 195

False

Front 196

This is the correct way to initialize a class

def __init__(self, new_var):

----self.new_var = new_var

Back 196

True

Front 197

What is the format for calling a method inside of a class?

Back 197

instance = ClassName(att1, att2, att3)

print instance.method()

Front 198

What will the following print to the console?

my_list = range(10)

print filter(lambda x: x**2 / 3 < 5, my_list)

Back 198

[0, 1, 2, 3]

Front 199

What is this list comprehension equal to?

[i for i in range(10) if i % 3 == 1]

Back 199

[1, 4, 7]

Front 200

When does python write data to a file?

Back 200

When you close the file

Front 201

How do you call a method from another method that is from the same class?

Back 201

self.method_name()

Front 202

What is file I/O?

Back 202

File input / output

Front 203

Create a variable, my_file, and set it equal to calling the open() function on output.txt. In this case, pass "r+" as a second argument to the function so the file will allow you to readand write to it!

Back 203

my_file = open('output.txt', 'r+')

Front 204

What does the use of 'w' do when opening a file?

Back 204

opens in write-only mode

Front 205

How do you open a file in read only mode?

Back 205

my_file = open('filename.txt', 'r')

Front 206

How do you open a file in read and write mode?

Back 206

my_file = open('filename.txt', 'r+')

Front 207

How do you open a file in append mode?

Back 207

my_file = open('filename.txt', 'a')

Front 208

What MUST you do in order for python to write to the file properly?

Back 208

Close the file when done writing to it

Front 209

my_file.write() will only take what as an argument?

Back 209

strings

Front 210

How do you close the file when you are done writing to it?

Back 210

my_file.close()

Front 211

What do you have to do before reading or writing to a file?

Back 211

open it (determine how you would like to)

Front 212

write a line of code that prints the result of reading my_file

Back 212

print my_file.read()

Front 213

How do you read one line of a file at a time?

Back 213

.readline()

Front 214

What is buffered data?

Back 214

data that it is held in a temporary location before being written to the file.

Front 215

what is the benefit of using with and as?

Back 215

python will automatically close the file for you

Front 216

What is the syntax for using with and as?

Back 216

with open("file", "mode") as variable:

Front 217

what does the .closed attribute do?

Back 217

returns True if the file is closed and False otherwise

Front 218

What function is required for classes to initialize objects?

Back 218

__init__()

Front 219

How does using a for loop on a file work?

Back 219

for line in f:

Front 220

(T or F)

Lists can be added and multiplied

Back 220

True

Front 221

What will this code output?

list1= [1, 2, 3]

print(list1 + [4, 5, 6])

Back 221

[1, 2, 3, 4, 5, 6]

Front 222

How does the 'in' operator work?

Back 222

Checks if an item is in something (like a list or string) and then returns True if it is and False if it is not.