Reference no: EM132325438

In this Python coding where would examples of the following be?

A. Examples of four uses of list operations:

i. Creating lists

ii. Adding and removing data from a list

iii. Accessing values in a list

iv. Modifying values in a list

B. Examples of dictionary operations.

i. Creating dictionaries

ii. Adding and removing key-value pairs

iii. Accessing values using keys

iv. Modifying values

C. Examples of loop structures using comments in your code. Be sure your examples address each of the following:

i. Item-based for loops

ii. Index-based (range) for loops

iii. While loops

#Task: Create the empty data structure

grocery_history = []

#Variable used to check if the while loop condition is met

stop = 'go'

while stop.lower() != "q":

   #Here we ask the user for input to help build the data dictonary for grocery items

   item_name = input("Item name:n");

   quantity = input("Quantity purchased:n");

   cost = input("Price per item:n");

   #Using the update function to create a dictionary entry which contains the name, number and price entered by the user.

   grocery_item = {'name': item_name, 'number': int(quantity), 'price': float(cost)};

   #Add the grocery_item to the grocery_history list using the append function

   grocery_history.append(grocery_item);

   #Now we need to ask the user if they are finished or would like to add more items.

   stop = input("Would you like to enter another item?nType 'c' for continue or 'q' to quit:n");

# Define variable to hold grand total called 'grand_total'

grand_total = 0

#The for loop below is used to help perform the calculations to obtain the item total for each item in the grocery history list 

for grocery_item in grocery_history:

 #Calculate the total cost for the grocery_item.

 print(" %d %s @ $%.2f ea $%.2f " %(grocery_item['number'], grocery_item['name'], grocery_item['price'], (grocery_item['price'] * grocery_item['number'])));

 #Add the item_total to the grand_total

 grand_total += (grocery_item['price'] * grocery_item['number']);

#Print the grand total

print("n Grand Total: $%.2f n" %(grand_total));