Trying to change my code to include loops and listed variables to make more streamline and expandable code

Strock, glad your here. I created a solution for you (below) but I wanted to offer some key advice you would benefit from first.

Your question isn't a hard one, but it's almost asking for someone to turn your code into a usable, repeatable script (your asking for loops, a function, etc.). In other words, it comes across as more of a 'will someone do this for me' vice 'How do I do [A] with Python'.

I'm not sure what your profession or intention is regarding python, but if you are seeking to gain more competence with the programming language, the following tips are much more important for you than the solution below.

1. Break down your script into small parts, i.e., you know you need loops, so start by creating a very simple loop, understanding it's syntax (https://www.freecodecamp.org/news/python-for-loop-example-and-tutorial/). After you build a loop. Add another piece (like appending items to a list like I did below), and so on. Continue with some patience, and you will be rewarded with better python skills.

2. I'm still fairly new to the stack overflow community, but here are some tips for getting good responses to questions:

• make your question as specific as possible, i.e., 'what's the proper syntax for defining a function in python' is better than 'I need a function and some loops and other things to make this script better'

• then before you post it, search to see if someone else already asked/answered your question

• if there is no answer, ask it here and provide the code involved (which you did nicely)

Best of luck!

Note: the calculations you did (which I copied exactly) didn't make much sense to me, but I also don't know exactly what this is for. Anyways, feel free to comment if you have any questions!

#create wt_convert function which has two required parameters: list of weights and total cost
def wt_convert(list_of_weights, total_cost):
    
    unit = "pounds"
    pounds = 0.00220462

    #create empty list to hold converted weights
    converted_weights = []

    #loop through the list of weights, convert them, add them to 'converted_weights' list
    for wt in list_of_weights:
        conversion = float(wt * pounds)
        converted_weights.append(conversion)
    
    #calculate total weight by using sum function and passing list of 'converted_weights'
    totalweight = sum(converted_weights)

    #loop through 'converted_weights', calculate price, print result for each
    i = 1
    n = 0
    for wt in converted_weights:
        price = (wt / totalweight) * (total_cost * 3)
        print('Specimen {} is {} {} and is worth $ {}'.format(
            i,
            converted_weights[n],
            unit,
            price
        ))
        i += 1
        n += 1          

#now function (above) is ready, prepare the needed parameters to use it
specimen_weights = []

#used 'while loop' to enable user to make as many inputs as desired
keep_going = "y"
i = 1
while keep_going == "y":
    wt = int(input("What is the weight of specimen {}: ".format(i)))
    specimen_weights.append(wt)
    i += 1
    keep_going = input("To add another specimen, input 'y'. Otherwise press enter: ")

#ask user for total cost
totalcost = float(input("What is the total price of the lot?: "))

#now call function and pass list of specimen weights and totalcost
wt_convert(specimen_weights, totalcost)

example output: