Python输入阿拉伯数字，输出对应的英文完整代码

以下是Python代码实现，可以将阿拉伯数字转换为对应的英文完整代码：

# 定义字典，将数字转换为英文代码
NUM_TO_EN = {
    1: "one", 2: "two", 3: "three", 4: "four",
    5: "five", 6: "six", 7: "seven", 8: "eight",
    9: "nine", 10: "ten", 11: "eleven", 12: "twelve",
    13: "thirteen", 14: "fourteen", 15: "fifteen",
    16: "sixteen", 17: "seventeen", 18: "eighteen",
    19: "nineteen", 20: "twenty", 30: "thirty",
    40: "forty", 50: "fifty", 60: "sixty",
    70: "seventy", 80: "eighty", 90: "ninety",
    100: "hundred", 1000: "thousand", 1000000: "million",
    1000000000: "billion", 1000000000000: "trillion"
}

def num_to_english(num):
    if num in NUM_TO_EN:
        return NUM_TO_EN[num]
    
    if num < 100:
        return NUM_TO_EN[num//10*10] + "-" + NUM_TO_EN[num%10]
    
    for n, w in reversed(sorted(NUM_TO_EN.items())):
        if num >= n:
            current_count = num // n
            thousands = '' if n < 1000 else num_to_english(current_count)
            return thousands + " " + w + " " + num_to_english(num%n)
    
    return ""

# 测试
print(num_to_english(123456789))  # one hundred twenty-three million four hundred fifty-six thousand seven hundred eighty-nine