Core code:

def ipPools(numPage):
    headers = randomHeads()
    url = 'http://www.xicidaili.com/nn/'
    saveFsvFile = open('ips.csv', 'wb')
    writer = csv.writer(saveFsvFile)
    for num in range(1, numPage + 1):
        full_url = url + str(num)
        re = requests.get(full_url, headers=headers)
        soup = BeautifulSoup(re.text, 'lxml')
        res = soup.find(id="ip_list").find_all('tr')
        for item in res:
            try:
                temp = []
                tds = item.find_all('td')
                proxyIp = tds[1].text.encode("utf-8")
                proxyPort = tds[2].text.encode("utf-8")
                temp.append(proxyIp)
                temp.append(proxyPort)
                writer.writerow(temp)
                print('保存为excel成功！')
            except IndexError:
                pass
Points to note.
   Be sure to convert str to bytes :
   str.encode("utf-8")
   python36 file method to open
   open('ips.csv', 'wb') change wb to w I got an error right here.  If there is the same error can, as a reference it!