4th Quarter Computer Literacy

How do you insert COMMENTS in Python code?

# This is a comment

What is the correct file extension for Python files?

.py

Which operator can be used to compare two values?

==

and

A logical operator

not

A logical operator

or

A logical operator

pass

A null statement, a statement that will do nothing

Rules for writing identifiers 2

An identifier cannot start with a digit.

A variable that can only have two values, True or False.

Boolean

False

Boolean value, result of comparison operations

True

Boolean value, result of comparison operations

Python's advantage 1

Developers can learn it quickly

bool('False')

False

assert

For debugging

Python's advantage 5

Huge amount of additional open-source libraries

Rules for writing identifiers 1

Identifiers can be a combination of letters in lowercase or uppercase or digits or an underscore.

Rules for writing identifiers 3

Keywords cannot be used as identifiers.

Legal Variable Names

Myvar, myvar, My_var, myVar1

None

Represents a null value

max(list)

Returns item from the list with max value

min(list)

Returns item from the list with min value

Rules for writing identifiers 5

Spaces are not allowed in identifier names.

Python's advantage 3

Syntax is easier to read

Vlookup()

The Vlookup function can be used to compare a value that's between two values or for an exact value. The values of the first column must be in descending order. With this function, the comparison table is always read vertically.

Suppose cells A2:B20 contain a table with product numbers in column A and product prices in column B. What does the formula =VLOOKUP(A25,A2:B20,1,FALSE) return?

The number for the product in column A (or #N/A if the exact product number can't be found).

Suppose cells A2:B20 contain a table with sorted product numbers in column A and product prices in column B. What does the formula =VLOOKUP(A25,A2:B20,2) return?

The price for the product found in column A (or #N/A if the exact product number can't be found)

Suppose cells A2:B20 contain a table with product numbers in column A and product prices in column B. What does the formula =VLOOKUP(A25,A2:B20,2,FALSE) return?

The price for the product in column A if the exact product number corresponding to A25 can be found, or #N/A if not.

break

To break out of a loop

in

To check if a value is present in a list, tuple, etc.

continue

To continue to the next iteration of a loop

for

To create a for loop

while

To create a while loop

as

To create an alias

lambda

To create an anonymous function

global

To declare a global variable

nonlocal

To declare a non-local variable

class

To define a class

def

To define a function

del

To delete an object

yield

To end a function, returns a generator

return

To exit a function and return a value

import

To import a module

from

To import specific parts of a module

if

To make a conditional statement

try

To make a try...except statement

raise

To raise an exception

is

To test if two variables are equal

Is Python case sensitive while dealing with identifiers ?

True

bool("")

True

All the keywords except ___ are in lowercase and they must be written as it is.

True, False and None

Python's advantage 2

Typically involves less code (Built-in types and tools)

else

Used in conditional statements

elif

Used in conditional statements, same as else if

with

Used to simplify exception handling

finally

Used with exceptions, a block of code that will be executed no

except

Used with exceptions, what to do when an exception occurs

Python's advantage 4

Utilized by every major technology company (Python runs virtually every major platform used today)

Rules for writing identifiers 6

Variable names are case-sensitive

Rules for writing identifiers 4

We cannot use special symbols like !, @, $, % etc.

Python library is

a collection of functions and methods that allows you to perform many actions without writing your code.

extend()

add the elements of a list to the end of the current list

append()

adds an element at the end of the list

insert()

adds an element at the specified position

#Python has

an input function which lets you ask a user for some text input.

Variables do not need to be declared with

any particular type and can even change type after they have been set.

With the -- we can stop the loop before it has looped through all the items

break statement

The elif statement allows you to

check multiple expressions for TRUE and execute a block of code as soon as one of the conditions evaluates to TRUE.

Python's design philosophy emphasizes

code readability with its notable use of significant whitespace.

cmp(list1, list2)

compares elements of both lists

Variables are

containers for storing data values.

There can be any number of -, each followed by an indented block.

elif lines

len(list)

gives the total length of the list

matter

if there is an exception or not

How do you start writing an if statement in Python?

if x>y:

The -, -, and - lines are all aligned.

if, each elif, the final else

What is Python?

it is an interpreted, high-level, general-purpose programming language.

bool

logical value indicating True or False

float

numbers with a decimal point

tup

ordered immutable sequence of objects

str

ordered sequence of characters

list

ordered sequences of objects

What is a correct syntax to output "Hello World" in Python?

print("Hello World"), print('Hello World')

Which function displays a message on the screen in Python?

print()

clear()

removes all the elements from the list

pop()

removes the element at the specified position

remove()

removes the element at the specified position

copy()

returns a copy of the list

index()

returns the index of the first element with the specified value

count()

returns the number of elements with the specified value

reverse()

reverses the order of the list

sort()

sorts the list

You can specify a range of indexes by --.

specifying where to start and where to end the range.

Its language constructs and object-oriented approach aim

to help programmers write clear, logical code for small and large-scale projects.

Python allows you to assign values

to multiple variables in one line:

set

unordered collection of unique objects

dict

unordered key:Value pairs

int

whole numbers

How to swap two variables in one line ?

x,y=y,x

How do you create a variable with the numeric value 5?

x=int(5), x=5

dynamic typing means

you can reassign variables to different data types