Python爬蟲實戰之Requests+正則表示式爬取貓眼電影Top100
阿新 • • 發佈:2018-11-30
import requests from requests.exceptions import RequestException import re import json # from multiprocessing import Pool # 測試了下 這裡需要自己新增頭部 否則得不到網頁 headers = { 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36' } # 得到html程式碼 defget_one_page(url): try: response = requests.get(url, headers = headers) if response.status_code == 200: return response.text return None except RequestException: return None # 解析html程式碼 def parse_one_page(html): pattern = re.compile('<dd>.*?board-index.*?>(\d+)</i>.*?data-src="(.*?)".*?name"><a.*?">(.*?)</a>.*?star">(.*?)</p>.*?releasetime">(.*?)</p>.*?integer">(.*?)</i>.*?fraction">(.*?)</i>.*?(/dd)', re.S) items = re.findall(pattern, html) for item in items: # 將元組形式變為字典 yield { '【排名】': item[0], '【圖片】': item[1], '【標題】': item[2], '【主演】': item[3].strip()[3:], '【上映時間】': item[4].strip()[5:], '【評分】': item[5] + item[6] }# 寫入檔案 def write_to_file(content): # 注意encoding = 'utf-8'和ensure_ascii = False,不寫的話不能輸出漢字 with open('電影.txt', 'a', encoding = 'utf-8') as f: f.write(json.dumps(content, ensure_ascii = False) + '\n') f.close() # 主函式 def main(offset): url = 'http://maoyan.com/board/4?offset=' + str(offset) html = get_one_page(url) for item in parse_one_page(html): print(item) write_to_file(item) if __name__ == '__main__': for i in range(10): main(i * 10) # 多程序(測試有bug) # if __name__ == '__main__': # pool = Pool() # pool.map(main, [i * 10 for i in range(10)]) # pool.join() # pool.close()
程式碼來自崔慶才