How to use the idna.core.check_label function in idna

if line[-1:] == b'\r': line = line[:-1]
    if self.state == u'STATUS': self.statusReceived(line); self.state = u'HEADER'
    elif self.state == u'HEADER':
        if not line or line[0] not in b' \t':
            if self._partialHeader is not None:
                _temp = b''.join(self._partialHeader).split(b':', 1)
                name, value = _temp if len(_temp) == 2 else (_temp[0], b'')
                self.headerReceived(name, value.strip())
            if not line: self.allHeadersReceived()
            else: self._partialHeader = [line]
        else: self._partialHeader.append(line)
import twisted.web._newclient
twisted.web._newclient.HTTPParser.lineReceived = lineReceived
# 以下补丁代码：解决 idna 库过于严格，导致带有下划线的 hostname 无法验证通过的异常
import idna.core
_check_label_bak = idna.core.check_label
def check_label(label):
    try: return _check_label_bak(label)
    except idna.core.InvalidCodepoint: pass
idna.core.check_label = check_label

import json
import types
import traceback
from scrapy import Request

class VSpider(RedisSpider):
    name = 'v'
    def parse(self, response):
        _plusmeta   = response._plusmeta.copy()
        taskid      = _plusmeta.pop('taskid')
        spider_name = _plusmeta.pop('spider_name')

if self._partialHeader is not None:
                _temp = b''.join(self._partialHeader).split(b':', 1)
                name, value = _temp if len(_temp) == 2 else (_temp[0], b'')
                self.headerReceived(name, value.strip())
            if not line: self.allHeadersReceived()
            else: self._partialHeader = [line]
        else: self._partialHeader.append(line)
import twisted.web._newclient
twisted.web._newclient.HTTPParser.lineReceived = lineReceived
# 以下补丁代码：解决 idna 库过于严格，导致带有下划线的 hostname 无法验证通过的异常
import idna.core
_check_label_bak = idna.core.check_label
def check_label(label):
    try: return _check_label_bak(label)
    except idna.core.InvalidCodepoint: pass
idna.core.check_label = check_label

import json
import types
import traceback
from scrapy import Request

class VSpider(RedisSpider):
    name = 'v'
    def parse(self, response):
        _plusmeta   = response._plusmeta.copy()
        taskid      = _plusmeta.pop('taskid')
        spider_name = _plusmeta.pop('spider_name')
        module_name = _plusmeta.pop('module_name')
        __callerr__ = _plusmeta.pop('__callerr__')

        # 在传递脚本的 start_requests 执行时会执行一次将脚本加载成对象放入

seen = set()
        filtered = []

        for d in self.domains:
            if d['domain-name'] in seen:
                continue

            seen.add(d['domain-name'])

            if self.__validate_domain(d['domain-name']):
                filtered.append(d)

        self.domains = filtered

        idna.core.check_label = old_func

def __filter_domains(self):

        # IDNA encoding's detailed check makes this 4x slower, and we validate
        # all requests that just query a domain later on.
        old_func = idna.core.check_label
        idna.core.check_label = lambda l: None

        seen = set()
        filtered = []

        for d in self.domains:
            if d['domain-name'] in seen:
                continue

            seen.add(d['domain-name'])

            if self.__validate_domain(d['domain-name']):
                filtered.append(d)

        self.domains = filtered

def __filter_domains(self):

        # IDNA encoding's detailed check makes this 4x slower, and we validate
        # all requests that just query a domain later on.
        old_func = idna.core.check_label
        idna.core.check_label = lambda l: None

        seen = set()
        filtered = []

        for d in self.domains:
            if d['domain-name'] in seen:
                continue

            seen.add(d['domain-name'])

            if self.__validate_domain(d['domain-name']):
                filtered.append(d)

        self.domains = filtered

        idna.core.check_label = old_func