用python创建简单的网络爬虫应用软件 用python爬虫需要下些什么软件
\u6c42\u7528Python\u7f16\u5199\u7684\u4e00\u4e2a\u7b80\u5355\u7684\u7f51\u7edc\u722c\u866b\uff0c\u8dea\u6c42\uff01\uff01\uff01\uff01#\u722c\u866b\u7684\u9700\u6c42\uff1a\u722c\u53d6github\u4e0a\u6709\u5173python\u7684\u4f18\u8d28\u9879\u76ee#coding=utf-8import requestsfrom bs4 import BeautifulSoupdef get_effect_data(data): results = list() soup = BeautifulSoup(data, 'html.parser') # print soup projects = soup.find_all('div', class_='repo-list-item d-flex flex-justify-start py-4 public source') for project in projects: # print project,'----' try: writer_project = project.find('a', attrs={'class': 'v-align-middle'})['href'].strip() project_language = project.find('div', attrs={'class': 'd-table-cell col-2 text-gray pt-2'}).get_text().strip() project_starts = project.find('a', attrs={'class': 'muted-link'}).get_text().strip() update_desc = project.find('p', attrs={'class': 'f6 text-gray mr-3 mb-0 mt-2'}).get_text().strip() # update_desc=None result = (writer_project.split('/')[1], writer_project.split('/')[2], project_language, project_starts, update_desc) results.append(result) except Exception,e: pass # print results return resultsdef get_response_data(page): request_url = 'https://github.com/search' params = {'o': 'desc', 'q': 'python', 's': 'stars', 'type': 'Repositories', 'p': page} resp = requests.get(request_url, params) return resp.textif __name__ == '__main__': total_page = 1 # \u722c\u866b\u6570\u636e\u7684\u603b\u9875\u6570 datas = list() for page in range(total_page): res_data = get_response_data(page + 1) data = get_effect_data(res_data) datas += data for i in datas: print i
\u4e0d\u9700\u8981\u989d\u5916\u7684\u8f6f\u4ef6\u5427\uff0c\u81ea\u8eab\u7684urllib\u548curllib2\u90fd\u53ef\u4ee5\u8fdb\u884c\u722c\u866b\u7f16\u7a0b\uff0c\u4f46\u662f\u8fd8\u662f\u63a8\u8350\u7b2c\u4e09\u65b9\u5305requests\u7279\u522b\u7b80\u5355\u6613\u7528\uff0c\u5bb9\u6613\u4e0a\u624b\u3002\u5177\u4f53\u7528\u6cd5\u53ef\u4ee5\u76f4\u63a5\u767e\u5ea6\u8fd9\u4e9b\u5305\u540d\u5b57\u5c31\u4f1a\u6709\u5f88\u591a\u6559\u7a0b\u3002
所谓的网络爬虫，就是用程序不停地做重复的上网动作，然后对获取的数据进行分析，得出结果的过程。提供一个示例， 一次性读取某网站小说100章，保存到电脑txt格式文档。
绛旓細Python缃戠粶鐖櫕灏辨槸浣跨敤 Python 绋嬪簭寮鍙鐨勭綉缁鐖櫕锛堢綉椤佃湗铔涳紝缃戠粶鏈哄櫒浜猴級锛屾槸涓绉嶆寜鐓т竴瀹氱殑瑙勫垯锛岃嚜鍔ㄥ湴鎶撳彇涓囩淮缃戜俊鎭殑绋嬪簭鎴栬呰剼鏈備富瑕佺敤浜庢悳绱㈠紩鎿庯紝瀹冨皢涓涓綉绔欑殑鎵鏈夊唴瀹逛笌閾炬帴杩涜闃呰锛屽苟寤虹珛鐩稿叧鐨勫叏鏂囩储寮曞埌鏁版嵁搴撲腑锛岀劧鍚庤烦鍒板彟涓涓綉绔欍傛嫇灞曪細鐖櫕鍒嗙被 浠庣埇鍙栧璞℃潵鐪嬶紝鐖櫕鍙互鍒嗕负...
绛旓細浠ヤ笅浠ｇ爜杩愯閫氳繃锛歩mport reimport requestsdef ShowCity(): html = requests.get("http://www.tianqihoubao.com/weather/province.aspx?id=110000") citys = re.findall('', html.text, re.S) for city in citys: print(city)ShowCity()杩愯鏁堟灉锛...
绛旓細鐖櫕娴佺▼ 鍏跺疄鎶缃戠粶鐖櫕鎶借薄寮鏉ョ湅锛屽畠鏃犲涔庡寘鍚涓嬪嚑涓楠 妯℃嫙璇锋眰缃戦〉銆傛ā鎷熸祻瑙堝櫒锛屾墦寮鐩爣缃戠珯銆傝幏鍙栨暟鎹傛墦寮缃戠珯涔嬪悗锛屽氨鍙互鑷姩鍖栫殑鑾峰彇鎴戜滑鎵闇瑕佺殑缃戠珯鏁版嵁銆備繚瀛樻暟鎹傛嬁鍒版暟鎹箣鍚庯紝闇瑕佹寔涔呭寲鍒版湰鍦版枃浠舵垨鑰呮暟鎹簱绛夊瓨鍌ㄨ澶囦腑銆傞偅涔堟垜浠濡備綍浣跨敤 Python 鏉ョ紪鍐欒嚜宸辩殑鐖櫕绋嬪簭鍛紝鍦ㄨ繖閲...
绛旓細浠涔堟槸python鐖櫕锛熻鎴戜滑涓璧蜂簡瑙ｄ竴涓嬪惂锛丳ython鐖櫕灏辨槸浣跨敤 Python 绋嬪簭寮鍙鐨勭綉缁鐖櫕锛屾槸涓绉嶆寜鐓т竴瀹氱殑瑙勫垯锛岃嚜鍔ㄥ湴鎶撳彇涓囩淮缃戜俊鎭殑绋嬪簭鎴栬呰剼鏈備富瑕佺敤浜庢悳绱㈠紩鎿庯紝瀹冨皢涓涓綉绔欑殑鎵鏈夊唴瀹逛笌閾炬帴杩涜闃呰锛屽苟寤虹珛鐩稿叧鐨勫叏鏂囩储寮曞埌鏁版嵁搴撲腑锛岀劧鍚庤烦鍒板彟涓涓綉绔欍傛嫇灞曪細python鏄粈涔 Python鏄竴绉嶈法...
绛旓細鍙互浠庤幏鍙栫綉椤靛唴瀹广佽В鏋怘TML銆佹彁鍙栨暟鎹瓑鏂归潰杩涜瀹炶返銆5. 娣卞叆瀛︿範锛氶殢鐫瀵Python鐖櫕鐨勭啛鎮夌▼搴︽彁楂橈紝鍙互瀛︿範鏇撮珮绾х殑鐖櫕鎶鏈紝濡傚姩鎬佺綉椤电埇鍙栥佸弽鐖櫕绛栫暐搴斿绛夈傚叓鐖奔閲囬泦鍣ㄦ槸涓娆惧姛鑳藉叏闈佹搷浣绠鍗銆侀傜敤鑼冨洿骞挎硾鐨勪簰鑱旂綉鏁版嵁閲囬泦鍣紝鍙互甯姪鐢ㄦ埛蹇熻幏鍙栨墍闇鐨勬暟鎹備簡瑙ｆ洿澶氭暟鎹噰闆嗙殑鏂规硶鍜屾妧宸...
绛旓細import urllib.request page1_q=urllib.request.urlopen("http://www.baidu.com")text1=page1_q.read().decode("utf8")print(text1)
绛旓細鍏蜂綋姝ラ鏁翠綋鎬濊矾娴佺▼ 绠鍗曚唬鐮佹紨绀哄噯澶囧伐浣滀笅杞藉苟瀹夎鎵闇瑕佺殑python搴擄紝鍖呮嫭锛氬鎵闇瑕佺殑缃戦〉杩涜璇锋眰骞惰В鏋愯繑鍥炵殑鏁版嵁瀵逛簬鎯宠鍋氫竴涓绠鍗曠殑鐖櫕鑰岃█锛岃繖涓姝ュ叾瀹炲緢绠鍗曪紝涓昏鏄氳繃requests搴撴潵杩涜璇锋眰锛岀劧鍚庡杩斿洖鐨勬暟鎹繘琛屼竴涓В鏋愶紝瑙ｆ瀽涔嬪悗閫氳繃瀵逛簬鍏冪礌鐨勫畾浣嶅拰閫夋嫨鏉ヨ幏鍙栨墍闇瑕佺殑鏁版嵁鍏冪礌锛岃繘鑰岃幏鍙栧埌...
绛旓細杩欎釜绯荤粺鍙互鍖呮嫭浠ヤ笅鍔熻兘锛1. 缃戠粶鐖櫕锛氬紑鍙戜竴涓埇铏▼搴忥紝浣跨敤Python缂栫▼璇█锛岃兘澶熻嚜鍔ㄤ粠鐭ヨ瘑闂瓟绀惧尯锛堝Stack Overflow銆丵uora绛夛級鐖彇鐩稿叧鏁版嵁銆傝繖浜涙暟鎹彲浠ュ寘鎷棶棰樸佸洖绛斻佽瘎璁虹瓑淇℃伅銆2. 鏁版嵁瀛樺偍锛氳璁′竴涓暟鎹簱妯″瀷锛岀敤浜庡瓨鍌ㄧ埇鍙栧埌鐨勬暟鎹紝鍙互閫夋嫨浣跨敤鍏崇郴鍨嬫暟鎹簱锛堝MySQL銆丳ostgreSQL锛夋垨闈...
绛旓細鍦ㄥ涔python鐨杩囩▼涓紝瀛︿細鑾峰彇缃戠珯鐨勫唴瀹规槸鎴戜滑蹇呴』瑕佹帉鎻＄殑鐭ヨ瘑鍜屾妧鑳斤紝浠婂ぉ灏卞垎浜竴涓嬬埇铏殑鍩烘湰娴佺▼锛屽彧鏈変簡瑙ｄ簡杩囩▼锛屾垜浠啀鎱㈡參涓姝ユ鐨勫幓鎺屾彙瀹冩墍鍖呭惈鐨勭煡璇Python缃戠粶鐖櫕澶ф闇瑕佷互涓嬪嚑涓楠わ細涓銆佽幏鍙栫綉绔欑殑鍦板潃鏈変簺缃戠珯鐨勭綉鍧鍗佸垎鐨勫ソ鑾峰彇锛屾樉鑰屾槗瑙侊紝浣嗘槸鏈変簺缃戝潃闇瑕佹垜浠湪娴忚鍣ㄤ腑缁忚繃鍒嗘瀽...
绛旓細2銆丼crapy Scrapy鐩窼crapy, a fast high-level screen scraping and web crawling framework for Python.淇′笉灏戝悓瀛﹂兘鏈夎抽椈锛岃绋嬪浘璋变腑鐨勮澶氳绋嬮兘鏄緷鎵楽crapy鎶撳幓鐨勶紝杩欐柟闈㈢殑浠嬬粛鏂囩珷鏈夎澶氾紝寮曡崘澶х墰pluskid鏃╁勾鐨勪竴绡囨枃绔狅細銆奡crapy 杞绘澗瀹氬埗缃戠粶鐖櫕銆嬶紝鍘嗕箙寮ユ柊銆3銆 Python-Goose Goose鏈鏃╂槸鐢...
