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 num_heavy_ints(a, b):
    """
    Return the number of heavy integers between a and b (inclusive).
    Assume that a and b are positive integers.

    >>> num_heavy_ints(8675, 8689)
    5
    """
    start, end = sorted((a, b))
    count = 0
    for i in range(start, end + 1):
        number = i
        dlen = 0
        dsum = 0
        while(number):
            dlen += 1
            dsum += number % 10
            number //= 10
        if dsum > dlen * 7:
            count += 1
    return count