intwords.py

mode = 2

# Convert integer to words.
if mode == 0:
    units = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven',
        'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen', 'fourteen',
        'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen']
    tens = ['zero', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty',
        'seventy', 'eighty', 'ninety']
    powers = ['zero', 'thousand', 'million', 'billion', 'trillion',
        'quadrillion', 'quintillion', 'sextillion', 'septillion', 'octillion',
        'nonillion', 'decillion']
    hundred = 'hundred'
    minus = 'minus'
    comma = ','
    and_ = ' and'
    space = ' '
    hyphen = '-'
    empty = ''
    key = len

# Convert integer to number-of-words.
elif mode == 1:
    units = [1 for n in range(20)]
    tens = [1 for n in range(0, 100, 10)]
    powers = [1 for n in range(12)]
    hundred = 1
    minus = 1
    comma = 0
    and_ = 1
    space = 0
    hyphen = 0
    empty = 0
    key = lambda n: n

# Convert integer to number-of-syllables.
elif mode == 2:
    units = [2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 1, 2, 2, 2, 2, 3, 2, 2]
    tens = [2, 1, 2, 2, 2, 2, 2, 3, 2, 2]
    powers = [2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3]
    hundred = 2
    minus = 2
    comma = 0
    and_ = 1
    space = 0
    hyphen = 0
    empty = 0
    key = lambda n: n

def small_integer_name(n, use_and=False):
    s = empty
    if n >= 100:
        q, n = divmod(n, 100)
        s = units[q] + space + hundred + (
            (and_ if use_and else empty) + space if n > 0 else empty)
    if n >= 20:
        q, n = divmod(n, 10)
        s += tens[q] + (hyphen if n > 0 else empty)
    return (s + units[n] if n > 0 else s)

def integer_name(n, use_comma=False, use_and=False, power=0):
    if n < 0:
        return minus + space + integer_name(-n, use_comma, use_and)
    elif n == 0:
        return units[0]
    s = empty
    if n >= 1000:
        q, n = divmod(n, 1000)
        s = integer_name(q, use_comma, use_and, power + 1) + (
            (comma if use_comma else empty) + space if n > 0 else empty)
    return (s + small_integer_name(n, use_and) +
            (space + powers[power] if power > 0 else empty) if n > 0 else s)

print(sum(integer_name(n) for n in range(1, 1000001)))