Most Bacis for loop

Hi I tried the most simplest for loop there is in python but I getting erro and how to fix it?

dataEnteringNode = IN
dataEnteringNode = IN[0] ?

yes thanks it is working now

dataEnteringNode = IN declares all python inputs as IN. If you look at your python node you have one input (IN[0]). In order to call that specific input you would need to either get IN[0] or set IN[0] to a new variable.

I don’t think you want dataEnteringNode = IN[0]. It would cause confusion if you had multiple inputs. The proper solution would be to use

a = a + IN[0][i]


sequence = IN[0]
     a = a + sequence[i]