numabbr.py

'''Given an integer between 0 and 999,999, print an English phrase that describes the integer (eg, “One Thousand, Two Hundred and Thirty Four”).'''
dict_units = {0:'',1:'one',2:'two',3:'three',4:'four',5:'five',
6:'six',7:'seven',8:'eight',9:'nine'}

dict_tens = {0:'',10: 'ten',20:'twenty',30:'thirty',40:'fourty',50:'fifty',60:'sixty',70:'seventy',80:'eighty',90:'ninty'}

steps = {0: '', 1:'thousand', 2 : 'million', 3: 'billion'}
def exp(n):
    strn = str(n)
    if len(strn) == 3 :
        str1 = dict_units[int(strn[0])] + ' hundred '+ dict_tens[int(strn[1])*10] +' ' + dict_units[int(strn[2])]
        
    elif len(strn) == 2 :
        str1 = dict_tens[int(strn[0])*10] +' ' + dict_units[int(strn[1])]
    
    elif len(strn) == 1:
        str1 = dict_units[int(strn[0])]
    else:
        str1=''
    
    return str1
    
    
def num_desc(n):
    
    result = ""
    step = 0
    
    while n != 0:
        if n%1000 != 0:
            result = exp(n%1000) + ' ' + steps[step] + ' '+ result
        n = n/1000
        step += 1
       
    return result
        
        

    
    
print num_desc(398275)