Write a python program that reads from a text file whose name is provided by the user, a list of a coffee shop products ordered by a customer (a sample input file is shown below). Each line contains item name, quantity and price (in biza) per product. Compute and display the total payment amount (in riyals) for each product as well as the total bill. Your program should consider the following erroneous cases: • The file does not open/exist • The format of the data in the file is incorrect (e.g. quantity = "!" or price "8&0"), in which case RuntimeError exception should be raised and the processing stops. Note: Make sure you close any open file even if an error occurs.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Exercise 4:
Write a python program that reads from a text file whose name is provided by the user, a list of a
coffee shop products ordered by a customer (a sample input file is shown below). Each line
contains item name, quantity and price (in biza) per product. Compute and display the total
payment amount (in riyals) for each product as well as the total bill. Your program should consider
the following erroneous cases:
• The file does not open/exist
• The format of the data in the file is incorrect (e.g. quantity = "!" or price "8&0"), in
which case RuntimeError exception should be raised and the processing stops.
Note: Make sure you close any open file even if an error occurs.
Enter filename: order1.txt
Product
Qty
Payment
Expresso:2 1200
Turkish coffee:3 1250
2.40
3.75
Expresso
Turkish coffee
File contents invalid.
invalid literal for int() with base 10: '880'
Shish tawook:2 8&0
Coca cola:! 1300
3
Water 1/2L: 100
Total: 6.15
Sample input file
Sample output
Transcribed Image Text:Exercise 4: Write a python program that reads from a text file whose name is provided by the user, a list of a coffee shop products ordered by a customer (a sample input file is shown below). Each line contains item name, quantity and price (in biza) per product. Compute and display the total payment amount (in riyals) for each product as well as the total bill. Your program should consider the following erroneous cases: • The file does not open/exist • The format of the data in the file is incorrect (e.g. quantity = "!" or price "8&0"), in which case RuntimeError exception should be raised and the processing stops. Note: Make sure you close any open file even if an error occurs. Enter filename: order1.txt Product Qty Payment Expresso:2 1200 Turkish coffee:3 1250 2.40 3.75 Expresso Turkish coffee File contents invalid. invalid literal for int() with base 10: '880' Shish tawook:2 8&0 Coca cola:! 1300 3 Water 1/2L: 100 Total: 6.15 Sample input file Sample output
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