flask 日志级别设置只记录error级别及以上的问题

当我在设置flask 日志时

handler = logging.FileHandler('flask.log', encoding='UTF-8')
    handler.setLevel(logging.DEBUG)
    logging_format = logging.Formatter(
        '%(asctime)s - %(levelname)s -%(pathname)s- %(filename)s - %(funcName)s - %(lineno)s - %(message)s'
    )
handler.setFormatter(logging_format)
app.logger.addHandler(handler)

flask 使用时

from flask import current_app

@app.route('/hello')
def hell():
    current_app.logger.info('----------------info----------------')
    current_app.logger.error('----------------err----------------')
    current_app.logger.debug('----------------debug----------------')
    current_app.logger.warning('----------------warning----------------')
    return 'hello World'

在flask.log 中记录的日志只有error级别以上

2019-12-13 17:41:28,189 - ERROR -/home/frange/servers/Allocation/manage.py- manage.py - hell - 24 - ----------------err----------------
2019-12-13 17:41:28,189 - WARNING -/home/frange/servers/Allocation/manage.py- manage.py - hell - 26 - ----------------warning----------------

处理

在创建app之前将log 级别重置为debug

logging.basicConfig(level=logging.DEBUG)