如何将重复的数字转换为对应的数字字母对？

def number_to_letter(num):
    """将数字0-9转换为对应的字母A-J"""
    if num < 0 or num > 9:
        raise ValueError("输入的数字必须在0到9之间")
    return chr(ord('A') + num)

def convert_repeated_numbers_to_letters(numbers):
    """将重复的数字转换为对应的数字字母对"""
    letter_pairs = []
    for num in numbers:
        letter_pairs.append(number_to_letter(num))
    return ''.join(letter_pairs)

# 示例使用
numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
result = convert_repeated_numbers_to_letters(numbers)
print(result)  # 输出: "ABCDEFGHIJ"

def number_to_letter(num):
    if num < 0 or num > 9:
        raise ValueError("输入的数字必须在0到9之间")
    return chr(ord('A') + num)

import multiprocessing as mp

def convert_number_to_letter_parallel(numbers):
    with mp.Pool() as pool:
        results = pool.map(number_to_letter, numbers)
    return ''.join(results)

# 示例使用
numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
result = convert_number_to_letter_parallel(numbers)
print(result)  # 输出: "ABCDEFGHIJ"