Question

PYTHON CODING HELP: BELOW ARE THE STEPS I NEED HELP WITH PLEASE. :)

First create a text file named "items.txt" that has the following data in this order:

Potatoes
Tomatoes
Carrots

... and have it be in the same directory as the Python program you are coding for this assignment.

IMPORTANT: Your program should work with any size file. It should work with 100 items listed or with no items in the file!

Write a Python program that ...

1. Puts this as the first line...

   import os

2. Creates an empty list

3. Defines main() function that performs the tasks listed below
when called.

4. Put these two lines at the top of the main function...

   if os.path.exists("costlist.txt"):
os.remove("costlist.txt")

Note: This removes the "costlist.txt" file, if it exists.

5. Display "Assignment 6"

6. Prompts the user to enter a file name.

a. If the file name entered is "end" then end the program.

b. If the file name is "items.txt", open the file for reading,
replace all the newline characters with an empty string, and
add all of the items from the file to the list that was
defined in step #2

c. If a FileNotFoundError exception occurs, display a message
that lets the user know the file was not found and gives
them a chance to try it again.

7. Sort the list.

8. For each element in the list, prompt the user to enter the price
for the element, e.g. How much should Carrots cost?

Convert the number entered into a float.

a. If the number entered does not convert properly into a float,
and gets a ValueError exception, then display a couple error
messages in the following format...

You entered an invalid float that could not convert string to float: 'ss'
Skipping to the next item after (element)

... and then prompt the user to enter the price of the next element
from the list.

b. If the number does convert properly to a float then create a string
variable with the following format...

(element) have a cost of (cost) dollars

... and open the "costlist.txt" file for appending and write the string
created to a line in the file.

9. Display "Cost List"

10. Display each line from the "costlist.txt" file

11. Display "Program End"

Answer 1

ANSWER :

CODE :

import os

list1 = []


def main():
    try:
        if os.path.exists("costlist.txt"):
            os.remove("costlist.txt")
        print("Assignment 6")

        file1 = input("Enter a file name : ")
        if file1.lower() == 'end':
            exit()
        elif file1.lower() == 'items.txt':
            fo = open(file1, 'r')
            data = fo.readlines()
            for i in data:
                i = i.replace("\n", '')
                list1.append(i)
    except FileNotFoundError:
        print("file was not found.Try again...!")
        main()

    sorted_list1 = sorted(list1)

    file2 = open("costlist.txt", 'w')
    for i in sorted_list1:
        cost = input("How much should " + i + " cost?")
        try:
            cost = float(cost)
            str1 = i + " have a cost of " + str(cost) + " dollars"
            file2.write(str1+"\n")
        except ValueError:
            print("You entered an invalid float that could not convert string to float : ", cost)
    file2.close()
    file_open = open("costlist.txt", 'r')
    cost_file_data = file_open.readlines()
    print("Cost List")
    for i in cost_file_data:
        print(i)
    print("Program End")


if __name__ == '__main__':
    main()

OUTPUT :

THANK YOU....!!!