如何缩进由python logger打印的多行消息？

import logging

def indent_message(message, indent):
    lines = message.split('\n')
    indented_lines = [' ' * indent + line for line in lines]
    return '\n'.join(indented_lines)

logger = logging.getLogger('my_logger')
logger.setLevel(logging.INFO)

formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
handler = logging.StreamHandler()
handler.setFormatter(formatter)
logger.addHandler(handler)

message = """
This is a multi-line message.
It will be indented by 4 spaces.
"""

indented_message = indent_message(message, 4)
logger.info(indented_message)