Design Back-propagation neural network to distinguish two shapes, rectangle, and square. If the input is a rectangle the output is (00) while if the input is square, then the output will be (11). Then use the backpropagation algorithm to update the weights for two iterations.

Week 5 Assignment 1: Discussion Assignment The discussion assignment provides a forum for discussing relevant topics for this week based on the course competencies covered. To support your work, use your course and text readings and also use outside sources. As in all assignments, cite your sources in your work and provide references for the citations in APA format. Database Concurrency Control and Data Security In this assignment, you will analyze database concurrency control and data security. You will also study the technological advances in the field of database design. Using the South University Online Library or the Internet, research the following: Database concurrency control and data security DBA tasks Technological advances in the field of databases Based on your research and understanding, complete the following tasks: Outline three examples of databases that you use every day. For each database: Describe how the data is displayed and extracted. Based on what you have learned so far, discuss how you think the DBMS provides this functionality in the background. Analyze three websites and outline your thoughts on how databases are used to provide information and data to the consumers of the websites. Compare the database designs of the three websites in terms of their features, performance, and usability. Highlight the information that you feel is worthy of a special mention. What should be completed first—application design or database design; or should they be completed at the same time? Provide sufficient reasoning to support your answer. "Web programming has an inherent problem with concurrency control." Do you agree with this statement? Why or why not? Discuss the possible solutions to resolve and manage concurrency control.

LAB ACTIVITY 16.23.1: Ch 9 Program: Online shopping cart (continued) (Python 3) 1 / 29 main.py Load default template... class ItemToPurchase: def __init__(self, item_name= 'none', item_price=0, item_quantity=0, item_description = 'none'): self.item_name = item_name self.item_price = item_price self.item_quantity = item_quantity self.item_description = item_description def print_item_cost(self): string = '{} {} @ ${} = ${}'.format(self.item_name, self.item_quantity, self.item_price, (self.item_quantity * self.item_price)) cost = self.item_quantity * self.item_price return string, cost def print_item_description(self): string = '{}: {}'.format(self.item_name, self.item_description) print(string, end=' ') return string class ShoppingCart: def __init__(self,customer_name= None ,current_date='January 1,2016',cart_items=[]): self.customer_name = customer_name self.current_date = current_date self.cart_items = cart_items def add_item(self,): print('\nADD ITEM TO CART', end='\n') #prompt the name and description of item,price and Quentity item_name = str(input('Enter the item name:')); item_description = str(input('\nEnter the item description:')); item_price = int(input('\nEnter the item price:')); item_quantity = int(input('\nEnter the item quantity:\n')) #Append the above values in to the list self.cart_items.append(ItemToPurchase(item_name, item_price, item_quantity, item_description)) #Implement the method to delete the item in the cart def remove_item(self): print() print('REMOVE ITEM FROM CART', end='\n') #prompt the item to remove the list string = str(input('Enter name of item to remove:\n')) i = 0 #Using for-loop to iterate every item for item in self.cart_items: #If item found delete in the list if(item.item_name == string): del self.cart_items[i] i += 1 #set the flag value to true #break from the list flag=True break #Otherwiese set value to false else: flag=False #IF the value not found if(flag==False): #print the message print('Item not found in cart. Nothing removed.') def modify_item(self): print('\nCHANGE ITEM QUANTITY', end='\n') #Prompt the input item name = str(input('Enter the item name:')) #Using for-loop to iterate every item for item in self.cart_items: #If item found update Quantity in the list if(item.item_name == name): quantity = int(input('Enter the new quantity:')) item.item_quantity = quantity #set the flag value to true #break from the list flag=True break #Otherwiese set value to false else: flag=False #IF the value not found if(flag==False): #print the message print('Item not found in cart. Nothing modified.') #implement method to compute total number of items in the cart def get_num_items_in_cart(self): num_items = 0 #Using for-loop to iterate the cart for item in self.cart_items: #ADD the Quantities num_items += item.item_quantity #return the num_Items return num_items #Implement the method def get_cost_of_cart(self): total_cost = 0 cost = 0 #Using for-loop to iterate the list #mulitply the price and Quantity #add value to the Total_Cost for item in self.cart_items: cost = (item.item_quantity * item.item_price) total_cost += cost #return the value return total_cost #Implement the method to print the total def print_total(): total_cost = self.get_cost_of_cart() if (total_cost == 0): print('SHOPPING CART IS EMPTY') else: output_cart() #Implement the method to print_descriptions def print_descriptions(self): print('OUTPUT ITEMS\' DESCRIPTIONS') print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date),end='\n') print('\nItem Descriptions', end='\n') for item in self.cart_items: print('{}: {}'.format(item.item_name, item.item_description), end='\n') #Implement the method output_cart() def output_cart(self): new=ShoppingCart() print('OUTPUT SHOPPING CART', end='\n') print('{}\'s Shopping Cart - {}'.format(self.customer_name, self.current_date),end='\n') print('Number of Items:', new.get_num_items_in_cart(), end='\n\n') self.total_cost = self.get_cost_of_cart() if (self.total_cost == 0): print('SHOPPING CART IS EMPTY') else: pass tc = 0 for item in self.cart_items: print('{} {} @ ${} = ${}'.format(item.item_name, item.item_quantity, item.item_price, (item.item_quantity * item.item_price)), end='\n') tc += (item.item_quantity * item.item_price) print('\nTotal: ${}'.format(tc), end='\n') #Implement the method print_menu def print_menu(new_cart): customer_Cart = newCart string='' #declare the string menu menu = ('\nMENU\n' 'a - Add item to cart\n' 'r - Remove item from cart\n' 'c - Change item quantity\n' 'i - Output items\' descriptions\n' 'o - Output shopping cart\n' 'q - Quit\n') command = '' #Using while loop #to iterate until user enters q while(command != 'q'): string='' print('\nMENU\n' 'a - Add item to cart\n' 'r - Remove item from cart\n' 'c - Change item quantity\n' 'i - Output items\' descriptions\n' 'o - Output shopping cart\n' 'q - Quit\n', end='\n') #Prompt the Command command = input('Choose an option:') print() #repeat the loop until user enters a,i,r,c,q commands while(command != 'a' and command != 'o' and command != 'i' and command != 'r' and command != 'c' and command != 'q'): command = input('Choose an option:\n') #If the input command is a if(command == 'a'): #call the method to the add elements to the cart customer_Cart.add_item() #If the input command is o if(command == 'o'): #call the method to the display the elements in the cart customer_Cart.output_cart() #If the input command is i if(command == 'i'): #call the method to the display the elements in the cart customer_Cart.print_descriptions() #If the input command is i if(command == 'r'): customer_Cart.remove_item() if(command == 'c'): customer_Cart.modify_item() # Type main section of code here if __name__ == "__main__": # Type main section of code here customer_name = str(input('Enter customer\'s name:')) current_date = str(input('\nEnter today\'s date:')) print() print() print('Customer name:', customer_name, end='\n') print('Today\'s date:', current_date, end='\n') newCart = ShoppingCart(customer_name, current_date) print_menu(newCart) Develop modeSubmit mode Run your program as often as you'd like, before submitting for grading. Below, type any needed input values in the first box, then click Run program and observe the program's output in the second box. Enter program input (optional)