new_contents: ##-*- coding: utf-8 -*- 
  #!/usr/bin/python
  '''
  Number to Hangul string util.
  '''
  
  __author__ = 'SeomGi, Han'
  __credits__ = ['SeomGi, Han']
  __copyright__ = 'Copyright 2015, Python Utils Project'
  
  __license__ = 'MIT'
  __version__ = '0.0.1'
  __maintainer__ = 'SeomGi, Han'
  __email__ = 'iandmyhand@gmail.com'
  __status__ = 'Production'
  
  
  HANGUL_NUMBER = [
      '', '일', '이', '삼', '사', '오', '육', '칠', '팔', '구', '십'
  ]
  HANGUL_NUMBER_UNIT = [
      '', '십', '백', '천'
  ]
  HANGUL_NUMBER_BIG_UNIT = [
      '', '만', '억', '조', '경', '해'
  ]
  
  
  class NumberUtils:
  
      def __init__(self):
          pass
  
      def convert_number_to_hangul_string(self, number_value):
          result = ''
          string_value = str(number_value)
          len_string_value = len(string_value)
          if string_value and string_value.isdigit():
              index = 0
              while index < len_string_value:
                  single_result = ''
                  hangul_number = HANGUL_NUMBER[int(string_value[index])]
                  if hangul_number:
                      unitindex = ((len_string_value - index) % 4) - 1
                      single_result += hangul_number + HANGUL_NUMBER_UNIT[unitindex]
                  if (len_string_value - index - 1) % 4 == 0:
                      big_unitindex = (len(string_value) - index - 1) // 4
                      if len(HANGUL_NUMBER_BIG_UNIT) > big_unitindex:
                          single_result += HANGUL_NUMBER_BIG_UNIT[big_unitindex]
                  result += single_result
                  index += 1
  
          return result
  
subject: Add a function can convert number to Hangul string.