For this assignment, you will be building on M$4$Pro!

I must point out however that what you$$ll be required to do here is somewhat different but having M$4$Pro done would certainly save you time.

So what$$s what will we do different here?........

Well let$$s first start by going over the inventory dictionary, see image below

Notice that the inventory dictionary references $5$ elements, one for author.

Also notice that each element$($author name$)$ points to a list of dictionaries, with each dictionary referencing information that pertains to one book.

So what$$s in common here?

$$ The following information is saved for each book.

$$ Author name

$$ Book name

$$ Unit Price

$$ Quantity

$$ Year published

After having gone over the above, lets move on to what you need to do for this assignment.

Instructions:

$1.$ You will create $2$ Classes, one for author information and one for book. Refer to bullet points below on the names that you are to assign for each class.

$$ Create a Author class. This class is to have the following attributes

o$$ author$\_$name $($must be defined when instance is created$)$

o$$ books $($a list of Book instances. Assign this attribute an empty list as a default value. Meaning passing a list of instances when creating an Author instance shouldn$$t be required. If not passed, the instance will reference an empty list.

o$$ all attributes must be protected

$$ Create a Book class. This class is to have the following attributes

o$$ book$\_$name$($must be defined when instance is created$)$

o$$ year$\_$pub$($must be defined when instance is created$)$

o$$ price$($must be defined when instance is created$)$

o$$ quantity$($must be defined when instance is created$)$

o$$ total $($automatically created when instance is created. Is the result of quantity multiplied by price$)$

o$$ all attributes must be protected

$2.$ Define necessary methods for each one of the two classes, should include the following

For the Book class:

a set$\_$total method that will be used to assign a value to the total attribute. This method is to be triggers when an instance is created in order to automatically calculate the total for each item.

getter method for each attribute. each method is to return the value that is reference in the attribute it was created for

setter method for the quantity and price attributes.

$\_\_$repr$\_\_$ method $.$ This method should return a string that displays attribute information in a tabular format $($similar to what was requested when displaying information in M$4$Pro$)$

For the Author class:

getter method for class attributes.

setter for the books attribute. This setter is to be used to append Book instances to the books attribute.

$\_\_$repr$\_\_$ method $.$ This method is a bit tricky and you will have to do some research on it $,$ why? Well it is to returns the author name and book information $($book name, year published, price $,$ quantity and total$)$ remember however we already have a $\_\_$repr$\_\_$ for the book instance. So what will you do $?$

Use AI to guide you in on how to do this but you MUST use the Book class repr to display book information.

$$

$$

$$

After having created the classes, lets move on to what the program should do$.$

$3.$ Add a create$\_$instance$()$ function to the M$4$Pro program you completed.

This function should be passed the book inventory dictionary.

It is to iterate over the dictionary.

$$Create an Author instance for each author. Create a Book instance for each book. Remember, the A total should be automatically calculated by the set$\_$total$()$ method for each book. The book instance should then be appended to the Author$$s $$books$$ attribute.

the function is to return Two lists, one for Author instances and another for Books instances. Remember each list will reference the instances that were created for each class.

$4.$ Add$$ write$\_$instance$()$ function that does the following:

this function should be passed a list $($ONE list$)$ of class objects.

it iterates over the list of objects then writes the following information for each object$/$instance

author name book name year published quantity price total

object information is to be retrieved using the getter methods $.$

the created csv file should have a properly named header row

The csv file should be assigned a proper name, more details below

How will the program work?

$5.$ When program is executed, the following menu will be displayed $($Notice it$$s exactly the same as what was requested in M$4$Pro$)1)$ Display Book Inventory and Calculate Total

$2)$ Lookup by Author and Get Total

$3)$ Lookup by Book Name and Get Total

$4)$ Lookup By Price Range

$5)$ Exit

Enter choice:

Part $1(85$ points$)$

$6.$ if $\backslash (\backslash$mathbf$\{$l$\}\backslash )$ is entered, the following should be done:

$-$ the program is still to display the inventory content as requested in M$4$Pro.

$-$ the createinstance function should be called. $($this is the function you were requested to create in step $3$ above$)$

so in this step, class instance will be created for each Author. The book information is to then be written into a csv file $($using class getter methods$).$ Name the file book$\_$inventory.csv

$7.$ if user enters $2,$ we w Again use class getters or the