In need of help with Python programming

Question

Write a program that turns the given number to letters (like one thousand six hundred and ninety nine). The number has to be between  1 and 99999999999.

Answer 1

I read the question wrong and did the opposite first hahaha both were fun to do though. Cheers!

ONES = [1, 2, 3, 4, 5, 6, 7, 8, 9]
TENS = [20, 30, 40, 50, 60, 70, 80, 90]
BENS = [100, 200, 300, 400, 500, 600, 700, 800, 900]
RACKS = [1000, 1000000, 1000000000]

def main():
    again = 'y'
    while again.lower() == 'y':
        num_string = input("Enter a number in word format: ")
    
        print("In number form, that is ", format(change_to_num(num_string), ',d'), '.', sep='')
        
        again = input("Do you have another number? [y/n]: ")
    
def change_to_num(num_string):
    num_list = get_num_list(num_string)
    if len(num_list) == 1:
        tot = num_list[0]
    else:
        tot = 0
        num_list = add_ones(num_list)
        num_list = get_bens(num_list)
        num_list = addTo_bens(num_list)
        num_list = mult_racks(num_list)
        for i in num_list:
            tot += i
    return tot

def get_num_list(num_string):
    str_list = num_string.split(' ')
    num_list = []
    for item in str_list:
        if item != 'and':
            num_list.append(get_num(item))
    return num_list
def get_num(string):
    if string.lower() == 'one':
        num = 1
    elif string.lower() == 'two':
        num = 2
    elif string.lower() == 'three':
        num = 3
    elif string.lower() == 'four':
        num = 4
    elif string.lower() == 'five':
        num = 5
    elif string.lower() == 'six':
        num = 6
    elif string.lower() == 'seven':
        num = 7
    elif string.lower() == 'eight':
        num = 8
    elif string.lower() == 'nine':
        num = 9
    elif string.lower() == 'ten':
        num = 10
    elif string.lower() == 'eleven':
        num = 11
    elif string.lower() == 'twelve':
        num = 12
    elif string.lower() == 'thirteen':
        num = 13
    elif string.lower() == 'fourteen':
        num = 14
    elif string.lower() == 'fifteen':
        num = 15
    elif string.lower() == 'sixteen':
        num = 16
    elif string.lower() == 'seventeen':
        num = 17
    elif string.lower() == 'eighteen':
        num = 18
    elif string.lower() == 'nineteen':
        num = 19
    elif string.lower() == 'twenty':
        num = 20
    elif string.lower() == 'thirty':
        num = 30
    elif string.lower() == 'forty':
        num = 40
    elif string.lower() == 'fifty':
        num = 50
    elif string.lower() == 'sixty':
        num = 60
    elif string.lower() == 'seventy':
        num = 70
    elif string.lower() == 'eighty':
        num = 80
    elif string.lower() == 'ninety':
        num = 90
    elif string.lower() == 'hundred':
        num = 100
    elif string.lower() == 'thousand':
        num = 1000
    elif string.lower() == 'million':
        num = 1000000
    elif string.lower() == 'billion':
        num = 1000000000
        
    return num
    
def add_ones(num_list):
    index = 0
    del_list = []
    temp_list = []
    for el in num_list:    
        if index != len(num_list)-1:
            if el in TENS and num_list[index+1] in ONES:
                del_list.append(index+1)
                added = el + num_list[index+1]
                temp_list.append(added)
                index += 1
            else:
                temp_list.append(el)
                index += 1
                            
        else:
            temp_list.append(el)
    for i in del_list:
        temp_list[i] = 0

    for c in range(len(del_list)):
        temp_list.remove(0)

    return temp_list

def get_bens(num_list):
    temp_list = []
    del_list = []
    index = 0
    for el in num_list:
        if index != 0:
            if el == 100:
                del_list.append(index-1)
                ben = num_list[index-1] * el
                temp_list.append(ben)
            else:
                temp_list.append(el)
        else:
                temp_list.append(el)
        index += 1

    for i in del_list:
        temp_list[i] = 0

    for c in range(len(del_list)):
        temp_list.remove(0)

    return temp_list

def addTo_bens(num_list):
    index = 0
    del_list = []
    temp_list = []
    for el in num_list:    
        if index != len(num_list)-1:
            if el in BENS and num_list[index+1] not in RACKS:
                del_list.append(index+1)
                added = el + num_list[index+1]
                temp_list.append(added)
            else:
                temp_list.append(el)
            index += 1                            
        else:
            temp_list.append(el)
        
    for i in del_list:
        temp_list[i] = 0

    for c in range(len(del_list)):
        temp_list.remove(0)

    return temp_list
                                
def mult_racks(num_list):
    temp_list = []
    index = 0
    for el in num_list:
        if index != 0:
            if el in RACKS:
                combine = num_list[index-1] * el
                temp_list.append(combine)
                del temp_list[temp_list.index(combine)-1]
            else:
                temp_list.append(el)
        else:
                temp_list.append(el)
        index += 1

    return temp_list

main()

Answer 2

I didn't take the time to comment this out so if you want the logic explained just shoot me a reply. It could probably be done in an easier way, but I'm only one semester into my CS degree. This was a fun problem!

def main():
    again = 'y'
    while again.lower() == 'y':
        number = int(input("Enter a number: "))
        print("In word format, that's", change_to_string(number) + '.')
        again = input("Do you have another number? [y/n]: ")

def change_to_string(number):
    place_list = format(number, ',d').split(',')

    string_list = []

    for place in place_list:
        if len(place) == 3:
            string_list.append(str_ben(place))
                
        elif len(place) == 2:
            string_list.append(str_ten(place))

        elif len(place) == 1:
            string_list.append(str_one(place))

    num_string = get_num_string(string_list)

    return num_string        

def str_ben(number):
    str_num = ''

    if number[0] == '0':
        str_num = ''
    elif number[1:] == '00':
        str_num += str_one(number[0]) + ' hundred'
        
    else:
        str_num += str_one(number[0]) + ' hundred and ' + str_ten(number[1:])

    return str_num

def str_ten(number):
    str_num = ''
    tens = int(number[0])
    ones = int(number[1])

    if tens == 0:
        str_num += str_one(ones)

    elif tens == 1:
        if ones == 0:
            str_num += 'ten'
        elif ones == 1:
            str_num += 'eleven'
        elif ones == 2:
            str_num += 'twelve'
        elif ones == 3:
            str_num += 'thirteen'
        elif ones == 4:
            str_num += 'fourteen'
        elif ones == 5:
            str_num += 'fifteen'
        elif ones == 6:
            str_num += 'sixteen'
        elif ones == 7:
            str_num += 'seventeen'
        elif ones == 8:
            str_num += 'eighteen'
        elif ones == 9:
            str_num += 'nineteen'
    elif tens == 2:
        if ones == 0:
            str_num += 'twenty'
        else:
            str_num += 'twenty ' + str_one(ones)
    elif tens == 3:
        if ones == 0:
            str_num += 'thirty'
        else:
            str_num += 'thirty ' + str_one(ones)
    elif tens == 4:
        if ones == 0:
            str_num += 'forty'
        else:
            str_num += 'forty ' + str_one(ones)
    elif tens == 5:
        if ones == 0:
            str_num += 'fifty'
        else:
            str_num += 'fifty ' + str_one(ones)
    elif tens == 6:
        if ones == 0:
            str_num += 'sixty'
        else:
            str_num += 'sixty ' + str_one(ones)
    elif tens == 7:
        if ones == 0:
            str_num += 'seventy'
        else:
            str_num += 'seventy ' + str_one(ones)
    elif tens == 8:
        if ones == 0:
            str_num += 'eighty'
        else:
            str_num += 'eighty ' + str_one(ones)
    elif tens == 9:
        if ones == 0:
            str_num += 'ninety'
        else:
            str_num += 'ninety ' + str_one(ones)

    return str_num

def str_one(number):
    num = int(number)
    
    if num == 0:
        string = ''
    elif num == 1:
        string = 'one'
    elif num == 2:
        string = 'two'
    elif num == 3:
        string = 'three'
    elif num == 4:
        string = 'four'
    elif num == 5:
        string = 'five'
    elif num == 6:
        string = 'six'
    elif num == 7:
        string = 'seven'
    elif num == 8:
        string = 'eight'
    elif num == 9:
        string = 'nine'

    return string

def get_num_string(string_list):
    string = ''

    place = len(string_list)

    if place == 1:
        string += string_list[0]
    else:
        for value in string_list:
            string += value
            if place == 4 and value != '':
                string += ' billion '
            elif place == 3 and value != '':
                string += ' million '
            elif place == 2 and value != '':
                string += ' thousand '
            place -= 1

        return string.rstrip()
main()