gistfile1.py

# a heavy int is one where the average of the digits is greater than 7
# eg: 8678 is heavy because (8 + 6 + 7 + 8) / 4 = 7.25
#     8677 is not heavy because ( 8 + 6 + 7 + 7) / 4 = 7

def is_heavy(my_number, heaviness=7):
    # cast @my_number to a string so we can iterate over it, then create a list of
    # numbers greater than @heaviness. if this list length is greater to or equal than half
    # the length of the original list, it's heavy
    return len([i for i in str(my_number) if int(i) > heaviness]) >= (len(str(my_number)) / 2)

def is_heavy(my_number, heaviness=7):
    # map each digit in @my_number to a string so sum them and then get the
    # average and determine if its greater than @heaviness number
    return sum(map(float, str(my_number))) / len(str(my_number)) > heaviness

Very good. Hunter wrote basically the same: http://gist.github.com/595089