python中怎么操作logging日志

import logging#logging模块高级使用#Loggers, Handlers, Formatters#设置日志的logger名字logger = logging.getLogger('Employee')#设置日志级别logger.setLevel(logging.INFO)#定义日志格式化输出内容formatter = logging.Formatter('%(levelname)s:%(name)s:%(message)s')#指定文件的日志处理器file_handler = logging.FileHandler('employee.log')#为日志处理器设置日志格式化file_handler.setFormatter(formatter)#添加文件处理器logger.addHandler(file_handler)#定义类class Employee:    """A sample Employee class"""    def __init__(self, first, last):        self.first = first        self.last = last        logger.info('Created Employee: {} - {}'.format(self.fullname, self.email))    @property    def email(self):        return '{}.{}@email.com'.format(self.first, self.last)    @property    def fullname(self):        return '{} {}'.format(self.first, self.last)#当我们创建对象的时候#会自动记录日志信息到#employee.log文件中去emp_1 = Employee('John', 'Smith')emp_2 = Employee('Corey', 'Schafer')emp_3 = Employee('Jane', 'Doe')