本文实例讲述了Python 实现的微信爬虫。分享给大家供大家参考，具体如下：
单线程版：
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import urllib.requestimport urllib.parseimport urllib.errorimport re,timeheaders = ("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3107.4 Safari/537.36")operner = urllib.request.build_opener()operner.addheaders = [headers]urllib.request.install_opener(operner)list_url = []###使用代理获取网页url内容def use_proxy(url): try: # proxy = urllib.request.ProxyHandler({'http':proxy_addr}) ##使用代理版 # operner = urllib.request.build_opener() # urllib.request.install_opener(operner) headers = ("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3107.4 Safari/537.36") operner = urllib.request.build_opener() operner.addheaders = [headers] urllib.request.install_opener(operner) data = urllib.request.urlopen(url).read().decode('utf-8') # print (data) return data except urllib.error.URLError as e: if hasattr(e, "code"): print(e.code) elif hasattr(e, "reason"): print(e.reason) except Exception as e: print("exception" + str(e)) time.sleep(1)##获取要爬取的urldef get_url(key, pagestart, pageend): try: keycode = urllib.parse.quote(key) for page in range(pagestart, pageend + 1): url = "http://weixin.sogou.com/weixin?query=%s&_sug_type_=&s_from=input&_sug_=n&type=%d&page=1&ie=utf8" % ( keycode, page) data1 = use_proxy(url) #print("data1的内容是", data1) listurl_pattern = '<h3>.*?("http://.*?)</h3>' result = re.compile(listurl_pattern, re.S).findall(data1) for i in range(len(result)): res = result[i].replace("amp;", "").split(" ")[0].replace("\"", "") list_url.append(res) #print(list_url) return list_url except urllib.error.URLError as e: if hasattr(e, "code"): print(e.code) elif hasattr(e, "reason"): print(e.reason) except Exception as e: print("exception:", e)##通过获取的url爬行内容数据并处理def get_url_content(list_url): fh1=open("D:\\python-script\\1.html", 'wb') html1 = '''<!DOCTYPE html>\n<html xmlns="http://www.w3.org/1999/xhmtl">\n<head>\n<meta http-equiv="Content-Type" content="text/html; charset=utf-8">\n<title>微信文章</title></head>\n<body>''' fh1.write(html1.encode("utf-8")) fh1.close() fh = open("D:\\python-script\\1.html", 'ab') for url in list_url: data_content = use_proxy(url) #print (data_content) #sys.exit() title_pattern = '<h2.*>.*?</h2>' result_title = re.compile(title_pattern, re.S).findall(data_content) ##标题(str) res_title = result_title[0].replace("<h2 class=\"rich_media_title\" id=\"activity-name\">", "").replace("</h2>", "").strip() content_pattern = 'id="js_content">(.*?)<div class="rich_media_tool" id="js_sg_bar">' content = re.compile(content_pattern, re.S).findall(data_content) try: fh.write(res_title.encode("utf-8")) for i in content: fh.write(i.strip().encode("utf-8")) except UnicodeEncodeError as e: continue fh.write("</body></html>".encode("utf-8"))if __name__ == '__main__': pagestart = 1 pageend = 2 key = "人工智能" get_url(key, pagestart, pageend) get_url_content(list_url) |
多线程版：
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import urllib.requestimport urllib.parseimport urllib.errorimport re,timeimport queueimport threadingheaders = ("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3107.4 Safari/537.36")operner = urllib.request.build_opener()operner.addheaders = [headers]urllib.request.install_opener(operner)urlque = queue.Queue()list_url = []###使用代理获取网页url内容def use_proxy(url): try: # proxy = urllib.request.ProxyHandler({'http':proxy_addr}) # operner = urllib.request.build_opener() # urllib.request.install_opener(operner) headers = ("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3107.4 Safari/537.36") operner = urllib.request.build_opener() operner.addheaders = [headers] urllib.request.install_opener(operner) data = urllib.request.urlopen(url).read().decode('utf-8') #print (data) return data except urllib.error.URLError as e: if hasattr(e,"code"): print (e.code) elif hasattr(e,"reason"): print (e.reason) except Exception as e: print ("exception"+str(e)) time.sleep(1)###获取文章的url连接，并将连接加入到队列class get_url(threading.Thread): def __init__(self,key,pagestart,pageend,urlque): threading.Thread.__init__(self) self.pagestart = pagestart self.pageend = pageend self.key = key self.urlque = urlque def run(self): try: keycode = urllib.parse.quote(self.key) for page in range(self.pagestart,self.pageend+1): url = "http://weixin.sogou.com/weixin?query=%s&_sug_type_=&s_from=input&_sug_=n&type=%d&page=1&ie=utf8" % (keycode,page) data = use_proxy(url) print ("data1的内容是",data) listurl_pattern = '<h3>.*?("http://.*?)</h3>' result = re.compile(listurl_pattern,re.S).findall(data) print (result) if len(result) == 0: print ("没有可用的url") sys.exit() for i in range(len(result)): res = result[i].replace("amp;","").split(" ")[0].replace("\"" ,"") #list_url.append(res) #加入列表 self.urlque.put(res) ##加入队列 self.urlque.task_done() #return list_url except urllib.error.URLError as e: if hasattr(e, "code"): print(e.code) elif hasattr(e, "reason"): print(e.reason) except Exception as e: print ("exception:",e)##根据url获取文章内容class get_url_content(threading.Thread): def __init__(self,urlque): threading.Thread.__init__(self) self.urlque = urlque def run(self): fh1 = open("D:\\python-script\\1.html", 'wb') html1 = '''<!DOCTYPE html>\n<html xmlns="http://www.w3.org/1999/xhmtl">\n<head>\n<meta http-equiv="Content-Type" content="text/html; charset=utf-8">\n<title>微信文章</title></head>\n<body>''' fh1.write(html1.encode("utf-8")) fh1.close() fh = open("D:\\python-script\\1.html", 'ab') while True: try: url = self.urlque.get() data_content = use_proxy(url) title_pattern = '<h2.*>.*?</h2>' result_title = re.compile(title_pattern, re.S).findall(data_content) ##标题 res_title = result_title[0].replace("<h2 class=\"rich_media_title\" id=\"activity-name\">", "").replace("</h2>","").strip() content_pattern = 'id="js_content">(.*?)<div class="rich_media_tool" id="js_sg_bar">' content = re.compile(content_pattern, re.S).findall(data_content) #c = '<p style="max-width: 100%;box-sizing: border-box;min-height: 1em;text-indent: 2em;word-wrap: break-word !important;">' # for i in content: # ##内容 # c_content=i.replace(c, "").replace("<br /></p>", "").replace("</p>", "") fh.write(res_title.encode("utf-8")) for i in content: fh.write(i.strip().encode("utf-8")) except UnicodeEncodeError as e: continue fh.close()class contrl(threading.Thread): def __init__(self,urlqueue): threading.Thread.__init__(self) self.urlqueue = urlqueue while True: print ("程序正在执行") if self.urlqueue.empty(): time.sleep(3) print ("程序执行完毕") exit()if __name__ == '__main__': pagestart = 1 pageend = 2 key = "人工智能" get_url = get_url(key,pagestart,pageend,urlque) get_url.start() get_content = get_url_content(urlque) get_content.start() cntrol = contrl(urlque) cntrol.start() |
希望本文所述对大家Python程序设计有所帮助。
原文链接：https://www.cnblogs.com/FRESHMANS/p/8125594.html
