$6\mathrm{.}15$ LAB: Format List Items Into Prices

Learning Goals

Practice looping over a collection to work with each element from the collection

Review CHALLENGE ACTIVITY $6\mathrm{.}5\mathrm{.}2$: For loop: Printing a list. to see how to

turn a string into a list

use f$-$strings to format a number into a price

Create a function with the requested parameter and returns a formatted list.

Instructions

Function

Create a function format$\_$as$\_$price$(),$ with prices$\_$str as a parameter. The function returns a list that stores each price formatted as a string with a dollar sign at the start and $2$ decimal places.

Inside the function, turn the text stored in the prices$\_$str into a list.

Loop over the elements in the list and convert each string into a float. $($Assume that each item in the string is a valid float.$)$

Finally, turn each float into a string, formatted as a price $($i$.$e$.,$ with $2$ decimal places$)$ that also has a $ at the start.

Add each formatted string to the list that's returned at the end of the function.

Main program

In your main program:

Take a string as input: this is the text that is input into the function.

Call the function format$\_$as$\_$price$()$ to get the formatted list into your main program.

Output each item on the list

Testing your code

Input

$34\mathrm{.}6276\mathrm{.}3085\mathrm{.}05$

The function returned

$[\text{'}$$$34\mathrm{.}62\text{'},\text{'}$$$76\mathrm{.}30\text{'},\text{'}$$$85\mathrm{.}05\text{'}]$

Main Program Output

$$34\mathrm{.}62$

$$76\mathrm{.}30$

$$85\mathrm{.}05$

Hints $/$ Troubleshooting

Remember that an f$-$string can help with outputting $2$ decimal places using f$"\{...$:$\mathrm{.}2$f$\}".$

If the "Unit Test" fails saying that $"$We ran into an error while running your code. Python says: could not convert string to float: $\text{'}.\text{'}"$ refer to the instructions:

what is the type of the input into the function?

what does the main program need to collect and do$?$

what is the function supposed to return?