started() - 记录 MongoDB 命令开始执行的内容succeeded() - 记录 MongoDB 命令成功执行的内容（当前被注释掉）failed() - 记录 MongoDB 命令执行失败的内容
import logging
from pymongo import monitoring
logging.basicConfig(level=logging.DEBUG)
class CommandLogger(monitoring.CommandListener):
def started(self, event):
logging.debug(f"MongoDB command started: {event.command_name} - {event.command}")
def succeeded(self, event):
logging.info(f"MongoDB command succeeded: {event.command_name} - {event.reply}")
def failed(self, event):
logging.error(f"MongoDB command failed: {event.command_name} - {event.failure}")
monitoring.register(CommandLogger())
