Question

This application is for you, the shopper in mind. Putting together an itemized shopping list that contains the items you need, the items you want, and the anticipated cost, this program will generate a total price. This way you can decide if your shopping budget fits the bill. Example list: Price List Binder paper: 2.29 Mop: 7.50 Scouring pads: 5 Your application program will create and write a new list to an output file in which the need and wish items are indistinguishable (i.e. input file labels have been removed). Your program will format this file so that items are left-aligned and the prices are right-aligned. The last line has the total of the prices. The Program Spec Obtain the input and output filenames from the user. Use the supplied test file, lab3.txt, for your submission run. Name your output filename yournameLab3out.txt. This program will read a file whose lines contain items and prices, in the format: Item name 1: price 1 Item name 2: price 2 … Note that each item name is terminated with a colon. The program will write a file in which the items are left-aligned and the prices are right-aligned. The last line has the total of the prices. Floating point numbers will be formatted to two decimal places. Your program will prompt the user for the name of the text file that contains your itemized shopping list. This itemized list will contain the item, followed by a colon, followed by a price. Example: Binder paper: 2.29 Hint: Make sure that there is a colon (:) in the lines that get copied into the outfile list. Note: The test file does contain lines without a colon – your program needs to recognize this and skip these lines (i.e. the new file should not contain these lines). To get you started, an itemized list, lab3.txt, is attached for you to use for your lab assignment. Use this text file for your lab submission test verification run. Your program will prompt the user for the input (i.e. lab3.txt) and output (i.e. yournameLab3out.txt) filenames. Deliverables (2 files expected): yournameLab3.py Your source code solution and a copy of the program run (i.e. the console output). Be sure to comment out your run (i.e. console output display) so that your .py file will still run in the grader test bed. yournameLab3out.txt Your output file (i.e. this is the file generated by your program run).

lab3.txt

Price List - Definitely Need

Apples: .57

Binder paper: 2.29

Cheese: 1.59

Mop: 7.50

Scouring pads: 5

Shampoo: 2.54

Wish List

Conditioner: 2.79

Ice Cream: 5.89

Answer 1

Python Program:

""" Python Program that reads need and wish items and outputs a new file with total price """

# Reading file name
fileName = input("Enter input file name: ")

# Opening output file
ofp = open("lab3out.txt", "w");

# Reading data from file
with open("lab3.txt", "r") as fp:
totalPrice=0
# Reading line by line
for line in fp:
# Checking for semicolon
if ':' in line:
# Fetching item and price
cols = line.split(':')
# Writing to file
ofp.write("%-20s : %5.2f\n"%(cols[0], float(cols[1])))
# Accumulating total price
totalPrice += float(cols[1])
# Writing Total Price
ofp.write("\nTotal Price: %15.2f\n"%(totalPrice))
# Closing files
ofp.close()

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Sample Run: