Getting ESXi Server EventLog for Host Going into Maintenance Mode

from pyVmomi import vim

import ssl

import os

s=ssl.SSLContext(ssl.PROTOCOL_TLSv1)

s.verify_mode=ssl.CERT_NONE

si=SmartConnect(host=" ", user=" ", pwd=" ",sslContext=s)

content=si.content

defget_all_objs(content, vimtype):

        obj = {}

        container = content.viewManager.CreateContainerView(content.rootFolder, vimtype, True)

        for managed_object_ref in container.view:

                obj.update({managed_object_ref: managed_object_ref.name})

        return obj

getESXi=get_all_objs(content, [vim.HostSystem])

for vm in getESXi:

        if vm.summary.runtime.inMaintenanceMode ==1 :

                # To- DO getting Events for Maintance;