python logging输入文件中文

import logging
file_hanlder = logging.FileHandler(filename='example.log', encoding='utf-8')

# logging\__init__.py
class FileHandler(StreamHandler):
    """
    A handler class which writes formatted logging records to disk files.
    """
    def __init__(self, filename, mode='a', encoding=None, delay=False):
        """
        Open the specified file and use it as the stream for logging.
        """
        # Issue #27493: add support for Path objects to be passed in
        filename = os.fspath(filename)
        ...

import logging.handler  #3.6版本必须要导入

file_handler = logging.handler.BaseRotatingHandler(filename='example.log', mode='a', encoding='utf-8')