写了一个简单的网络爬虫：

#coding=utf-8from bs4 import BeautifulSoupimport requestsurl = "http://www.weather.com.cn/textFC/hb.shtml"def get_temperature(url):    headers = {        'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36',        'Upgrade-Insecure-Requests':'1',        'Referer':'http://www.weather.com.cn/weather1d/10129160502A.shtml',        'Host':'www.weather.com.cn'    }    res = requests.get(url,headers=headers)    res.encoding = "utf-8"    content = res.content # 拿到的是ascll编码    content = content.decode('UTF-8')# 转成UTF-8编码    #print(content)    soup = BeautifulSoup(content,'lxml')    conMidetab = soup.find('div',class_='conMidtab')    conMidetab2_list = conMidetab.find_all('div',class_='conMidtab2')    for x in conMidetab2_list:        tr_list = x.find_all('tr')[2:] # 所有的tr        province = ''        min = 0        for index,x in enumerate(tr_list):            if index == 0:                td_list = x.find_all('td')                province = td_list[0].text.replace('\n','')                city = td_list[1].text.replace('\n','')                min = td_list[7].text.replace('\n','')            else:                td_list = x.find_all('td')                city = td_list[0].text.replace('\n','')                min = td_list[6].text.replace('\n','')            print(province,city,min)        # province_list = tr_list[2]        # td_list = province_list.find_all('td')        # province_td = td_list[0]        # province = province_td.text        # #print(province.replace('\n',''))get_temperature(url)