Write a Python program to calculate the average of a list of positive integers and output the result.
List of positive integers: [1, 5, 6, 7, 8]
list_of_positive_integers = [1, 5, 6, 7, 8]
total = sum(list_of_positive_integers)

avg = total/len(list_of_positive_integers)

print("The average of the list of positive integers is {}".format(avg))