Build a Discount Calculator - Build a Discount Calculator

Python
1

Tell us what’s happening:

I can’t pass tests 3-6, I left my if and first elif statements different to show some of the things I’ve tried for tests 3 and 4 since they are basically the same if I’m understanding the problem correctly. Tests 5 and 6 seem to work if I enter values outside of the set out ranges. I’ve spent maybe 3 hours on rereading the course/google/YouTube and I’m at a loss. Is there links to better explanations of how functions and scopes work? Just seems like I’m asking for help to get through every test

Your code so far

def apply_discount (price, discount):

    if not isinstance(price,(int,float)):
        print('The price should be a number')
    elif isinstance(discount,str):
        print('The discount should be a number')
    elif price <=0:
        print('The price should be greater than 0')
    elif discount <0 or discount >100:
        print('The discount should be between 0 and 100')
    else:
        apply_discount = price - price * discount / 100
        print(apply_discount)
    return(apply_discount)
    
apply_discount(100,20)
apply_discount(200,50)
apply_discount(50,0)
apply_discount(1,100)
apply_discount(74.5,20)

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Challenge Information:

Build a Discount Calculator - Build a Discount Calculator

2

Only few honest mistakes here:

  1. You’re asked to return and not print.
  2. These two are not the same:
not isinstance(var, (float, int)) != isinstance(var, str)

Fixing these will pass you the lab.

3

Clearly, I’m new to this so maybe you can explain it to me. My understanding is that it only recognizes strings, integers and floats. So, if I say check that it’s not a int, now check that it’s not float and so if it’s not either would that not imply that is has to be a string?

4

no, it doesn’t, there are more data types than float, int and str, you will meet them going forward, and there are more that you will not meet in the curriculum

example: try print(type(apply_discount))

1 Like
5

wow that lesson was a struggle, thank you very much for your help!