def lower_endian_to_number(l, base):
    'Helper function: convert a list of digits in the given base to a number.'
    return sum([(d * (base ** i)) for (i, d) in enumerate(l)])
Helper function: convert a list of digits in the given base to a number.
def lower_endian_to_number(l, base):
    
    return sum([(d * (base ** i)) for (i, d) in enumerate(l)])