Looking for Python code for below problem:
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The Creative Door Logistics is a successful name in the e-commerce vertical. The company’s development team is just trying to implement their online invoice management application, which will help its customers to purchase and get the invoice generated for the items in the shipping list. To begin with, they start with few modules of the application. Help the development team for writing codes for login validation, making a purchase and displaying the purchase details.
Initially, the application reads the username from the user, if invalid credentials are given then print “Invalid Username and Password” and terminate the application.
Once a valid Username and Password is given, the application should print “Login Successful” and then prompt the item to be purchased.
Display “Item not present” if the item number is not present in the item file in the main. If the valid item number is given, the application should prompt for the quantity of the item to be purchased. Use the prompt “Do you want to add one more item?(Yes or No)” to add more items to the list.
When the user chooses “No” from the above prompt, the list of items along with item number, item name, quantity and the cost is displayed with the total cost of the shopping list.
When the user selects Exit, the application terminates
Note:
The list of registered users is available in an xml file names userpass.xml
The list of items is available in an xml file named item.xml
Method Description:
| Method Name | Arguments | Return Type | Description |
| validateUsernamePassword() | Users file name(userFile), userName, password userFile- string username- string password- string | Boolean | This function validates the username and password. Print “Login Successful” and return True, if valid user; else print “Invalid username and password” and return False” |
| checkItemPresent() | Item File name(itemFile), itemNo. itemFile- string itemNo- integer | Boolean | This function will check whether the itemNo is present in the itemFile or not. Return True if the item is present, else return False. |
| purchaseItem() | Item File name(itemFile), username, itemNo, quantity. itemFile-string username- string itemNo- integer quantity-integer | List | This function checks whether the given item has the specified quantity present. If present, build a list with elements- itemNo, itemName, quantity and cost, and return the list. If the specified quantity is not present, print “The required quantity is not available” and return an empty list. |
| calculateAmount() | purchaseList purchaseList- list of purchased items | Integer | This function calculates the total cost for the purchased items. |
userpass.xml
<userList>
<user>
<username>Soukhya</username>
<password>soky</password>
</user>
<user>
<username>Sahana</username>
<password>sana</password>
</user>
<\userList>
item.xml
<itemList>
<item>
<itemNo>51</itemNo>
<name>Tops</name>
<cost>700</cost>
<quantity>50</quantity>
</item>
<item>
<itemNo>52</itemNo>
<name>Shoes</name>
<cost>1800</cost>
<quantity>65</quantity>
</item>
</itemList>
Sample input and output 1:
Enter username:
Sahana
Enter password:
soanaa
Invalid Username and Password
Sample input and output 2:
Enter username:
Sahana
Enter password:
sana
Login successful
1.Purchase Item
2.Exit
Enter your choice:
1
Enter item number:
51
Enter quantity of item:
200
The required quantity is not available.
Do you want to add one more item?(Yes/No):
Yes
Enter item number:
52
Enter the quantity of item:
2
Do you want to add one more item?(Yes/No):
No
Item No Name Quant Cost
52 Shoes 2 1800
Total Cost = 3600
1.Purchase item
2.Exit
Enter your choice:
2
Sample input output 3:
Enter username:
Sahana
Enter password:
sana
Login Successful
1.Purchase item
2.Exit
Enter your choice:
1
Enter item number:
501
Item not present
Enter item number:
51
Enter quantity of item:
1
Do you want to add one more item?(Yes/No):
Yes
Enter the item number:
52
Enter quantity of item:
2
Do you want to add one more item?(Yes/No):
No
Item No Name Quant Cost
51 Tops 1 700
52 Shoes 2 1800
Total cost = 4300
1.Purchase item
2.Exit
Enter your choice:
2
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Thanks in advance.
