White spaces

[Aurthor_King_of_the_Brittons]

Use "sep" as follows to eliminate all spaces and then add spaces where you want them inside the quotes.

    n=2005;
    while (n!=2008) :
        print("prediction_",n,", ","parameters_",n, " =get_predictions_each_year",(n,12), sep='');
        n=n+1;