使用Python分隔数字

num = 1234567890
num_str = str(num)
result = ' '.join(num_str)
print(result)

num = 1234567890
result = []
while num > 0:
    digit = num % 10
    result.insert(0, digit)
    num = num // 10
result_str = ' '.join(map(str, result))
print(result_str)

import re

num = 1234567890
result = re.sub(r"(?<=\d)(?=(\d{1}))", " ", str(num))
print(result)