1. 用requests库和BeautifulSoup库，爬取校园新闻首页新闻的标题、链接、正文。
url = "http://news.gzcc.cn/html/xiaoyuanxinwen/"res = requests.get(url);res.encoding = "utf-8"soup = BeautifulSoup(res.text,"html.parser");for news in soup.select("li"): if len(news.select(".news-list-title"))>0: #排除为空的li time = news.select(".news-list-info")[0].contents[0].text title = news.select(".news-list-title")[0].text description = news.select(".news-list-description")[0].text a = news.select('a')[0].attrs['href'] detail_res = requests.get(a) detail_res.encoding = "utf-8" detail_soup = BeautifulSoup(detail_res.text, "html.parser") print(detail_soup.select("#content")[0].text)#正文 print(time, title, description, a) content = detail_soup.select("#content")[0].text info = detail_soup.select(".show-info")[0].text date_time = info.lstrip('发布时间:')[:19] print(info) break 2. 分析字符串，获取每篇新闻的发布时间，作者，来源，摄影等信息。
info = '发布时间:2018-04-01 11:57:00 作者：陈流芳 审核：权麟春 来源：马克思主义学院 点击：次'detail_time = info.lstrip('发布时间:')[:19]sh = info[info.find("审核"):].split()[0].lstrip('审核：')print(detail_time,sh) 3. 将其中的发布时间由str转换成datetime类型。
# 获取当前的时间now_time = datetime.now();now_time.year# 将字符串转化为时间print(datetime.strptime(date_time,"%Y-%m-%d %H:%M:%S"))# 将时间转化为字符串print(now_time.strftime('%Y\%m\%d')) 4. 将完整的代码及运行结果截图发布在作业上。
import requestsfrom bs4 import BeautifulSoupfrom datetime import datetimeurl = "http://news.gzcc.cn/html/xiaoyuanxinwen/"res = requests.get(url);res.encoding = "utf-8"soup = BeautifulSoup(res.text,"html.parser");for news in soup.select("li"): if len(news.select(".news-list-title"))>0: #排除为空的li time = news.select(".news-list-info")[0].contents[0].text title = news.select(".news-list-title")[0].text description = news.select(".news-list-description")[0].text a = news.select('a')[0].attrs['href'] detail_res = requests.get(a) detail_res.encoding = "utf-8" detail_soup = BeautifulSoup(detail_res.text, "html.parser") print(detail_soup.select("#content")[0].text)#正文 print(time, title, description, a) content = detail_soup.select("#content")[0].text info = detail_soup.select(".show-info")[0].text date_time = info.lstrip('发布时间:')[:19] print(info) breakinfo = '发布时间:2018-04-01 11:57:00 作者：陈流芳 审核：权麟春 来源：马克思主义学院 点击：次'detail_time = info.lstrip('发布时间:')[:19]sh = info[info.find("审核"):].split()[0].lstrip('审核：')print(detail_time,sh)# # 多个名字查找作者info1 = '发布时间:2018-04-01 11:57:00 作者：陈流芳 许健杰 审核：权麟春 来源：马克思主义学院 点击：次 'info1 = info1[info1.find("作者"):info1.find('审核：')].lstrip('作者：').split()[1]print(info1)# 获取当前的时间now_time = datetime.now();now_time.year# 将字符串转化为时间print(datetime.strptime(date_time,"%Y-%m-%d %H:%M:%S"))# 将时间转化为字符串print(now_time.strftime('%Y\%m\%d')) 