整形转中文

实现一个整形转中文的函数.

输入:

  10023450

输出:

  一千零二万三千四百五十

要求:

  1. 可用中文"个","十","百","千","万","亿","兆","零","负"

  2. 最大支持百兆

1,000,000,000,000,000

    ^     ^    ^

    兆    亿   万

思路:

  1.每4位拆分成一段(个十百千)(万亿兆)

  2.中间的"零", 若重叠, 只输出一个"零", 如1004 -> 一千零四

  3.末尾中的"零"不输出, 如1100 -> 一千一百

  4.支持百兆, 输入要用long long

class Solution():
    def intToChinese(self, num):
        if len(str(num)) > 15: return 'too long'

        #初始化
        result_array, flag = [], ''
        if str(num)[0] == '-':
            num_array = list(str(num))[1: ][:: -1]
            flag = '负'
        else:
            num_array = list(str(num))[:: -1]
        dict_help = {'0': '零', '1' : '一', '2': '二', '3': '三', '4': '四', '5': '五', '6': '六', '7': '七', '8': '八', '9': '九'}
        directions = ['十', '百', '千']

        #长度为1
        if len(num_array) == 1: return dict_help[num_array[0]]

        #长度 > 1
        for i in range(len(num_array)):
            #针对千，百，十，个
            if i == 0 and num_array[i] != '0':
                result_array.append(dict_help[num_array[i]])
            elif 1 <= i <= 3:
                if num_array[i] == '0':
                    result_array.insert(0, '零')
                else:
                    result_array.insert(0, dict_help[num_array[i]] + directions[i - 1]) if num_array[i] != '0' else result_array.insert(0, '零')

            if 4 <= i < 8: 
                if i == 4:
                    res = self.help(num_array[4: 8], '万', dict_help, directions)
                    result_array = res + result_array
            
            if 8 <= i < 12:
                if i == 8:
                    res = self.help(num_array[8: 12], '亿', dict_help, directions)
                    result_array = res + result_array

            if i >= 12:
                if i == 12:
                    res = self.help(num_array[12: ], '兆', dict_help, directions)
                    result_array = res + result_array

        results = self.removeZero(result_array)
        #如果存在连续的0的话，则剔除
        return flag + ''.join(results)

    def removeZero(self, nums):
        new_nums = []

        for i in range(len(nums)):
            if nums[i - 1] == '零' and nums[i] == '零':
                continue
            else:
                new_nums.append(nums[i])

        if new_nums[-1] == '零': new_nums.remove(nums[-1])
        return new_nums

    #针对万，亿，兆
    def help(self, nums, name, dict_help, directions):
        res = []
        for i in range(len(nums)):
            if i == 0:
                if nums[i] != '0':
                    res.append(dict_help[nums[i]] + name)
                else:
                    res.append('零')
            else:
                if nums[i] != '0':
                    if name not in res[0]:
                        res.append(dict_help[nums[i]] + directions[i - 1] + name)
                    else:
                        res.append(dict_help[nums[i]] + directions[i - 1])
                else:
                    res.append('零')

        return res[:: -1]

result = Solution().intToChinese(10000310023450)
print(result)