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Python

Posted by Emmanuel Jimenez
Emmanuel Jimenez
21,666 Points

instances.py / OO Python course

Can someone help me here? I don't know what I'm doing bad and the bummer just said "Try again!".

Please help!

instances.py 
def combiner(*args):
    entrada = list(args)
    cadena = ""
    numeros 0

    for value in entrada:
        if isinstance(value, (str, int, float)):
            if isinstance(value, str):
                cadena += value
            elif isinstance(value, (float, int)):
                numeros += value

    combinacion = cadena + str(numeros)
    print(combinacion)

3 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

You are very close!

  • def combiner(args): # don't use the star syntax
  • numeros = 0 # add missing assognment
  • return combinacion # use return not print

Post back if you need more help. Good luck!!!

Ankoor Bhagat
Ankoor Bhagat
1,097 Points
Ankoor Bhagat
Ankoor Bhagat
1,097 Points

This runs perfectly in Jupyter notebooks, but fails in Treehouse challenge...Frustrating experience!!!

def combiner(series):
    strings = ''join([s for s in series if isinstance(i, str)])
    numbers = str(sum([n for n in series if (isinstance(n, int)|isinstance(n, float))]))
    return strings + numbers

>>> combiner(['apple', 5.2, 'dog', 8])
>>> 'appledog13.2'
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

Also should be s instead of i in first comprehension.

Ankoor Bhagat
Ankoor Bhagat
1,097 Points
Ankoor Bhagat
Ankoor Bhagat
1,097 Points

I pasted the wrong version here. I had corrected the . and i mistake. I usually work on Jupyter Notebook and paste stuff. The only thing I changed was isinstance(n, (int, float)) and it worked. The problem is that I do not get error trace on Treehouse platform so it is difficult.

Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

I wonder if there was something in how you had used a bitwise-or | instead of a logical or.