Python Object-Oriented Python Inheritance Instances

James Dunn
James Dunn
3,041 Points

isinstance code challenge

So I've tried several methods of achieving the answer including


however, I have not been able to figure out what I'm doing wrong.

Help would be much appreciated.

Thank you.
def combiner(self, l_input[]):
    i = 0
    s = ""
    n = 0

    for x in l_input:
        if isinstance(x, str):
            s += x
        elif isinstanc(x, int):
            n += x


1 Answer

Ben Slivinn
Ben Slivinn
10,152 Points

Hi, Check my code:

def combiner(stdin: list):
    sum = float()
    full_str = str()
    for item in stdin:
        if isinstance(item, int) or isinstance(item, float):
            sum = sum + item
            full_str = full_str + item
    return full_str + str(sum)

Self explanatory, but the function accept one argument (stdin) of list type. The I declare 2 variables, one of total sum of numbers and one for the strings. I iterate over stdin (list) and check if each item isinstance of integer or floating point number, if it is I add to the total sum, if the item is not instance of number, I assume it's a string (it's can be list or object but the challenge dosen't pass a list inside a list ect...) and add them too. At the end I add the total number sum as str to the full strings.


  1. At the challenge you should not pass self as first argument becouse it's a function not a class method.
  2. You check only for integers not floating point numbers.