标签:技术 == use blog nec parser iter exce agent
参考一个前辈的代码,修改了一个案例开始学习beautifulsoup做爬虫获取天气信息,前辈获取的是7日内天气,
我看旁边还有8-15日就模仿修改了下。其实其他都没有变化,只变换了获取标签的部分。但是我碰到
一个span获取的问题,如我的案例中每日的源代码是这样的。
<li class="t"> <span class="time">周五(19日)</span> <big class="png30 d301"></big> <big class="png30 n301"></big> <span class="wea">雨</span> <span class="tem"><em>36℃</em>/22℃</span> <span class="wind">东南风</span> <span class="wind1">微风</span> </li>
上门的所有span标签中,日期,天气,风向都可以通过beautifulsoup进行标签匹配获取。唯独温度获取不到,
获取到的值为none,我奇怪了好酒,用span.em能获取到36°,获取不完全,不符合我的要求。最后没办法。
我只能通过获取到这个span这一回内容
<span class="tem"><em>36℃</em>/22℃</span>
然后通过字符串替换替换掉多余的字符。剩余36℃/22℃
得到这个结果。存入变量并写入csv文件。
以下为全部代码,如有不对的地方欢迎指教。
‘‘‘ Created on 2017年5月10日 @author: bekey qq:402151718 ‘‘‘ #conding:UTF-8 import requests import csv import random import time import socket import http.client #import urllib.request from bs4 import BeautifulSoup def get_content(url , data = None): header={ ‘Accept‘: ‘text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8‘, ‘Accept-Encoding‘: ‘gzip, deflate, sdch‘, ‘Accept-Language‘: ‘zh-CN,zh;q=0.8‘, ‘Connection‘: ‘keep-alive‘, ‘User-Agent‘: ‘Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36‘ } timeout = random.choice(range(80, 180)) while True: try: rep = requests.get(url,headers = header,timeout = timeout) rep.encoding = ‘utf-8‘ # req = urllib.request.Request(url, data, header) # response = urllib.request.urlopen(req, timeout=timeout) # html1 = response.read().decode(‘UTF-8‘, errors=‘ignore‘) # response.close() break # except urllib.request.HTTPError as e: # print( ‘1:‘, e) # time.sleep(random.choice(range(5, 10))) # # except urllib.request.URLError as e: # print( ‘2:‘, e) # time.sleep(random.choice(range(5, 10))) except socket.timeout as e: print( ‘3:‘, e) time.sleep(random.choice(range(8,15))) except socket.error as e: print( ‘4:‘, e) time.sleep(random.choice(range(20, 60))) except http.client.BadStatusLine as e: print( ‘5:‘, e) time.sleep(random.choice(range(30, 80))) except http.client.IncompleteRead as e: print( ‘6:‘, e) time.sleep(random.choice(range(5, 15))) return rep.text # return html_text def get_data(html_text): final = [] bs = BeautifulSoup(html_text, "html.parser") # 创建BeautifulSoup对象 body = bs.body # 获取body部分 data = body.find(‘div‘, {‘id‘: ‘15d‘}) # 找到id为7d的div ul = data.find(‘ul‘) # 获取ul部分 li = ul.find_all(‘li‘) # 获取所有的li for day in li: # 对每个li标签中的内容进行遍历 temp = [] #print(day) span = day.find_all(‘span‘) #找到所有的span标签 #print(span) date = span[0].string # 找到日期 temp.append(date) # 添加到temp中 wea1 = span[1].string#获取天气情况 temp.append(wea1) #加入到list tem =str(span[2]) tem = tem.replace(‘<span class="tem"><em>‘, ‘‘) tem = tem.replace(‘</span>‘,‘‘) tem = tem.replace(‘</em>‘,‘‘) #tem = tem.find(‘span‘).string #获取温度 temp.append(tem) #温度加入list windy = span[3].string temp.append(windy)#加入到list windy1 = span[4].string temp.append(windy1)#加入到list final.append(temp) return final def write_data(data, name): file_name = name with open(file_name, ‘a‘, errors=‘ignore‘, newline=‘‘) as f: f_csv = csv.writer(f) f_csv.writerows(data) if __name__ == ‘__main__‘: url =‘http://www.weather.com.cn/weather15d/101180101.shtml‘ html = get_content(url) #print(html) result = get_data(html) #print(result) write_data(result, ‘weather7.csv‘)
效果如图:
项目地址:git@github.com:zhangbei59/weather_get.git
python获取网站http://www.weather.com.cn 城市 8-15天天气
标签:技术 == use blog nec parser iter exce agent
原文地址:http://www.cnblogs.com/netsa/p/6835273.html