Python3.5 Mac ios系统 爬取天气预报的小程序： import requests, csv, random, time, socket from bs4 import BeautifulSoup import http.client 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(Macintosh;Intel Mac OS X 10 11_6) AppleWebKit / 537.36(KHTML, like Gecko) Chrome / 50.0.2661.102Safari / 537.36'     }     timeout = random.choice(range(80,180))     while True:         try:             rep = requests.get(url, headers = header, timeout = timeout)             rep.encoding = 'utf-8'             break         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.ImproperConnectionState as e:             print('6:', e)             time.sleep(random.choice(range(5,15)))     return rep.text def get_data(html_text):     finalFile = []     bs = BeautifulSoup(html_text, 'html.parser')     body = bs.body     data = body.find('div', id="15d")     ul = data.find('ul')     li = ul.find_all('li')     for day in li:         temp = []         inf = day.find_all('span')         date = inf[0].string         temp.append(date)         weather = inf[1].string         temp.append(weather)         temperature= inf[2].text         temp.append(temperature)         wind = inf[3].string         temp.append(wind)         wind1 = inf[4].string         temp.append(wind1)         finalFile.append(temp)     return finalFile 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/101270101.shtml'     html = get_content(url)     result = get_data(html)     write_data(result, 'content.csv')