python的爬取html网页的疑问

 import requests
import xml.etree.ElementTree as ET
from xml.parsers.expat import ParserCreate

class DefaultSaxHandler(object):
    def __init__(self, provinces):
        self.provinces = provinces


    def start_element(self, name, attrs):
        pass

    def end_element(self, name):
        pass


    def char_data(self, text):
         if text!="a":
             text=text
             self.provinces.append(text)

def get_province_entry(url):

    content = requests.get(url).content.decode('gb2312')

    start = content.find('<table height="22" cellSpacing="0" cellPadding="0" width="710" border="0">')
    end = content.find('<hr size="1" width="520">')
    content = content[start:end].strip()

    provinces=[]

    handler = DefaultSaxHandler(provinces)

    parser = ParserCreate()
    parser.StartElementHandler = handler.start_element
    parser.EndElementHandler = handler.end_element
    parser.CharacterDataHandler = handler.char_data
    parser.Parse(content)

    return provinces

provinces = get_province_entry('http://www.ip138.com/post/')
print(provinces)

我的目标是爬取选中区域的文本值，但是出现错误

 ExpatError                                Traceback (most recent call last)
<ipython-input-20-14237f21aa15> in <module>()
     40     return provinces
     41 
---> 42 provinces = get_province_entry('http://www.ip138.com/post/')
     43 print(provinces)

<ipython-input-20-14237f21aa15> in get_province_entry(url)
     36     parser.EndElementHandler = handler.end_element
     37     parser.CharacterDataHandler = handler.char_data
---> 38     parser.Parse(content)
     39 
     40     return provinces

ExpatError: undefined entity: line 6, column 55

不知道哪里出错了

https://blog.csdn.net/chenyblog/article/details/78812948