Python

Question 1

What is Python?

Answer 1

Python is a high-level, general-purpose object oriented programming and scripting language.

Question 2

What is a High-Level programming language?

Answer 2

A High-Level programming language is a language that has a lot Abstraction from the details of the computer. For example it will simplify or automate tasks such as Memory Management opposed to a low-level language that is usually less readable and requires direct code for dealing with the details of the computing system. Low and High are used to describe high abstraction and low abstraction.

Question 3

How is a python variable declared?

Answer 3

variable = variable_value

Question 4

what does the \ do in this statement:

‘Hi, I'm Anthony’

Answer 4

It is used to escape string and use a special character ( ‘ ) the example could also be written “Hi I’m Anthony” because double quotes were used around the string.

Question 5

How do you create a single line comment in python?

Answer 5

By using the pound (hash) symbol.

Question 6

How do you create a multiple line comment in Python?

Answer 6

”"”You start it with the quotation marks followed by the comment and then end the multi line comment with three more quotation marks”””

Question 7

What does len( ) do?

Answer 7

len ( ) is a method that returns the string length of the string (including spaces) or variable storing a string that is passed to it.

Question 8

What does upper( ) do?

Answer 8

It convert a string or variable storing a string to uppercase. It is written like this
“eggs”.upper( )
That would return “EGGS”

Question 9

what does lower( ) do?

Answer 9

It converts a string or variable storing a string to lowercase. It is written like this:
“SpAm”.lower( )
that would return “spam”

Question 10

What does str( ) do?

Answer 10

It converts what ever is passed to it into a string (accept variable names). it is written like this:
str(2.13)
Would return “2.13”

Question 11

Why does lower( ) and upper( ) use dot notation?

Answer 11

lower( ) and upper ( ) are unique to strings so they use string literals where as len( ) and str( ) can be passed object that are not strings.

Question 12

what does print do?

Answer 12

Print outputs the what it is passed to the console from the interpreter.

Question 13

How do you concatenate string in python?

Answer 13

By using the plus sign (+).

“hello “ + “world”

Question 14

what are PEPs?

Answer 14

Python Enhancement Proposals

Question 15

What is the keyword to create a function?

Answer 15

def

Question 16

What is a docstring?

Answer 16

is a triple quoted (“””) multi link comment that comes before the code block of the function but after the name that briefly explains what the function does.

Question 17

What is a parameter?

Answer 17

a parameter is the what you place between the parenthesis when you define a function.

Question 18

What is an argument?

Answer 18

An argument is the data that you put inside the parenthesis when you run or call the function.

Question 19

What are “splat arguments” and how are they defined?

Answer 19

Splat arguments are when you don't know how many arguments a function will be passed so can't set up the number of parameter to match. The splat arguments gives you the ability to set a arbitrary place holder that accepts however many arguments are passed to it. it is defined like this:
def funcName(*args):
    the_function
The *args can be whatever you like but that is what is usually used.

Question 20

What are the ways you can import modules?

Answer 20

1. Generic Import
2. Function Import
3. Universal Import

Question 21

What is a generic import?

Answer 21

You can import the entire module using “import module_name”. When using things from this module you will have to type it’s name again i.e. module_name.module_functionORvariable

Question 22

what is a functional import?

Answer 22

Import a specific function or variable from a module. like this: from module_name import functionORvariable_name when this method is used you do not have to call the module name before using the function or variable.

Question 23

What is a universal import?

Answer 23

A universal import is when you import all of the functions and variable of a module and dump them all over the place. 
from module_name import * this makes it so you do not have to type the module_name before the function or variable but is not good practice as it is easy for conflicts to occur.

Question 24

What does min( ) do?

Answer 24

Return the smallest of the arguments passed.

Question 25

what does max( ) do?

Answer 25

Returns the largest of the arguments passed.

Question 26

what does abs( ) do?

Answer 26

Returns the absolute value (the distance from 0) of the arguments passed.

Question 27

What does type( ) do?

Answer 27

Returns the type of data that is passed as an argument.

Question 28

what are lists and how are they defined?

Answer 28

lists are multiple values assigned to on variable. and the are defined by placing square brakets around the items in you list. i.e. list = [“item1”, “item2”, “item3”]

Question 29

How do you change an item on a list?

Answer 29

By selecting the index of the list item and resetting it’s value like this:
list[2] = “item4”

Question 30

How do you add an item to a list?

Answer 30

By using the append( ) method. Like this:

list.append(“item5”)

Question 31

What is list slicing and how is it done?

Answer 31

List slicing is where you get selected items out of a list. You set a start point and an end point and it will return everything after the start point and everything BEFORE the end point. i.e. list_name[0:2] would return the 1st and 2nd items of the list.

Question 32

How do you add an item to a list at a specific position?

Answer 32

insert(index, item) where index is the postion that you want the item to be at and item is the value you want to place there.

Question 33

How to find the postion of an item in a list?

Answer 33

inde(item) where item is the value you are trying to find.

Question 34

How do sort items in a list?

Answer 34

using dot notation to call .sort( ) on the list. This will arrange the items in order of value from smallest to largest or alphabetically.

Question 35

What is a dictionary in Python?

Answer 35

A dictionary is ver similar to a list but it contains key - value pairs like this:
d = {“key1” : “value1”, “key2” : 2}
they are surrounded by curly braces.

Question 36

How do you add an item to a dictionary?

Answer 36

By choosing the dictionary and then assigning the key in side brakets followed by the equals sign and the value you want it to store.
i.e. d[“key3”] = “value3”

Question 37

How do you delete an item from a dictionary?

Answer 37

by using the del key world follow by the dictionary name and the key that you want to delete. i.e. del d[“Key1”] will delete both key1 and the value paired with it.

Question 38

How do you assign a new value to a dictionary key?

Answer 38

by just reassigning it like a variable i.e.

list[“key2”] = “Value9” key2 would now be paired with Value9 and what ever was previously assigned to it would be gone.

Question 39

How do remove an item from a dictionary based on it’s value.

Answer 39

dict_name.remove(value)