我使用python3+netconf查询防火墙的安全策略，报出UTF8的错误

我的python脚本如下：

#!/usr/bin/env python3
# coding: utf-8
import warnings,json,re
from ncclient import manager
warnings.simplefilter("ignore", DeprecationWarning)

def netconf_connect(jsonstr):
    def my_unknown_host_cb(host, figerprint):
        return True
    account = jsonstr['account']
    host = account['ip']
    port = account['port']
    user = account['userName']
    password = account['password']
    device = account['name']
    timeout = 300
    return manager.connect(host=host, port=port, username=user,password=password, unknown_host_cb=my_unknown_host_cb, allow_agent=False, look_for_keys=False,device_params={'name': device}, manager_params={'timeout': timeout})

def queryRule(jsonstr):
    xml = """<top
    xmlns="http://www.h3c.com/netconf/data:1.0"
    xmlns:base="http://www.h3c.com/netconf/base:1.0">
    <SecurityPolicies>
    <GetRules>
    <Rule>
    <Type/>
    <ID></ID>
    <Name/>
    <Action/>
    <SrcZoneList>
    <SrcZoneItem/>
    </SrcZoneList>
    <DestZoneList>
    <DestZoneItem/>
    </DestZoneList>
    <SrcAddrList>
    <SrcAddrItem/>
    </SrcAddrList>
    <DestAddrList>
    <DestAddrItem/>
    </DestAddrList>
    <ServObjList>
    <ServObjItem/>
    </ServObjList>
    <Enable/>
    <Log/>
    <Counting/>
    <SessAgingTimeSw/>
    <SessPersistAgingTimeSw/>
    <AllRulesCount/>
    </Rule>
    </GetRules>
    </SecurityPolicies>
    </top>"""
    with netconf_connect(jsonstr) as m:
        print(m.get(('subtree', xml)))

if __name__ == '__main__':
    func = 'queryRule'
    jsOninfo='''{"account":{"password":"xxxx","port":xxx,"ip":"x.x.x.x","name":"h3c","userName":"xxxx"}}'''
    jsOninfo= re.sub('\"{',"{",jsoninfo)
    jsOninfo= re.sub('}\"',"}",jsoninfo)
    jsOninfo= re.sub(r'\\','',jsoninfo)
    jsOnstr= json.loads(jsoninfo)
    if func == 'queryRule':
        queryRule(jsonstr)

我的报错截图如下

奇怪的是，这个脚本今天之前一直都可以使用

1. 当我修改xml变量的内容时：

xml = """<top
xmlns="http://www.h3c.com/netconf/data:1.0"
xmlns:base="http://www.h3c.com/netconf/base:1.0">
<SecurityPolicies>
<GetRules>
<Rule>
<Type/>
<ID></ID>
<Name/>
<Action/>
</Rule>
</GetRules>
</SecurityPolicies>
</top>"""

是可以正常返回结果的

2. 我又修改xml内容

xml = """<top

4.单独查询DestZoneList也是没有问题的

xml = """<top
xmlns="http://www.h3c.com/netconf/data:1.0"
xmlns:base="http://www.h3c.com/netconf/base:1.0">
<SecurityPolicies>
<GetRules>
<Rule>
<Type/>
<ID></ID>
<Name/>
<Action/>
<DestZoneList>
<DestZoneItem/>
</DestZoneList>
</Rule>
</GetRules>
</SecurityPolicies>
</top>"""

请问这是什么情况

无