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from urllib import parse, request from bs4 import BeautifulSoup as BS from multiprocessing import Pool import re import lxml import datetime import cProfile import socket import copy import xlsxwriter
starttime = datetime.datetime.now()
base_url = r'http://bj.fangjia.com/ershoufang/'
test_search_dict = {'昌平': {'霍营': {'13号线': 'http://bj.fangjia.com/ershoufang/--r-%E6%98%8C%E5%B9%B3|w-13%E5%8F%B7%E7%BA%BF|b-%E9%9C%8D%E8%90%A5'}}}
search_list = [] tmp_list = [] layer = -1
def get_page(url): headers = { 'User-Agent': r'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) ' r'Chrome/45.0.2454.85 Safari/537.36 115Browser/6.0.3', 'Referer': r'http://bj.fangjia.com/ershoufang/', 'Host': r'bj.fangjia.com', 'Connection': 'keep-alive' } timeout = 60 socket.setdefaulttimeout(timeout) req = request.Request(url, headers=headers) response = request.urlopen(req).read() page = response.decode('utf-8') return page
def get_search(page, key): soup = BS(page, 'lxml') search_list = soup.find_all(href=re.compile(key), target='') search_dict = {} for i in range(len(search_list)): soup = BS(str(search_list[i]), 'lxml') key = soup.select('a')[0].get_text() value = soup.a.attrs['href'] search_dict[key] = value return search_dict
def get_info_list(search_dict, layer, tmp_list, search_list): layer += 1 for i in range(len(search_dict)): tmp_key = list(search_dict.keys())[i] tmp_list.append(tmp_key) tmp_value = search_dict[tmp_key] if isinstance(tmp_value, str): tmp_list.append(tmp_value) search_list.append(copy.deepcopy(tmp_list)) tmp_list = tmp_list[:layer] elif tmp_value == '': layer -= 2 tmp_list = tmp_list[:layer] else: get_info_list(tmp_value, layer, tmp_list, search_list) tmp_list = tmp_list[:layer] return search_list
def get_info_pn_list(search_list): fin_search_list = [] for i in range(len(search_list)): print('>>>正在抓取%s' % search_list[i][:3]) search_url = search_list[i][3] try: page = get_page(search_url) except: print('获取页面超时') continue soup = BS(page, 'lxml') pn_num = 40 rule = re.compile(r'\d+') max_pn =pn_num for pn in range(1, max_pn+1): print('************************正在抓取%s页************************' % pn) pn_rule = re.compile('[|]') fin_url = pn_rule.sub(r'|e-%s|' % pn, search_url, 1) tmp_url_list = copy.deepcopy(search_list[i][:3]) tmp_url_list.append(fin_url) fin_search_list.append(tmp_url_list) return fin_search_list
def get_info(fin_search_list, process_i): print('进程%s开始' % process_i) fin_info_list = [] for i in range(len(fin_search_list)): url = fin_search_list[i][3] try: page = get_page(url) except: print('获取tag超时') continue soup = BS(page, 'lxml') title_list = soup.select('a[class="h_name"]') address_list = soup.select('span[class="address"]') attr_list = soup.select('span[class="attribute"]') price_list = soup.find_all(attrs={"class": "xq_aprice xq_esf_width"}) for num in range(20): tag_tmp_list = [] try: title = title_list[num].attrs["title"] print(r'************************正在获取%s************************' % title) address = re.sub('\n', '', address_list[num].get_text()) area = re.search('\d+[\u4E00-\u9FA5]{2}', attr_list[num].get_text()).group(0) layout = re.search('\d[^0-9]\d.', attr_list[num].get_text()).group(0) floor = re.search('\d/\d', attr_list[num].get_text()).group(0) price = re.search('\d+[\u4E00-\u9FA5]', price_list[num].get_text()).group(0) unit_price = re.search('\d+[\u4E00-\u9FA5]/.', price_list[num].get_text()).group(0) tag_tmp_list = copy.deepcopy(fin_search_list[i][:3]) for tag in [title, address, area, layout, floor, price, unit_price]: tag_tmp_list.append(tag) fin_info_list.append(tag_tmp_list) except: print('【抓取失败】') continue print('进程%s结束' % process_i) return fin_info_list
def assignment_search_list(fin_search_list, project_num): assignment_list = [] fin_search_list_len = len(fin_search_list) for i in range(0, fin_search_list_len, project_num): start = i end = i+project_num assignment_list.append(fin_search_list[start: end]) return assignment_list
def save_excel(fin_info_list, file_name): tag_name = ['区域', '板块', '地铁', '标题', '位置', '平米', '户型', '楼层', '总价', '单位平米价格'] book = xlsxwriter.Workbook(r'C:\Users\Esri\Desktop\%s.xlsx' % file_name) tmp = book.add_worksheet() row_num = len(fin_info_list) for i in range(1, row_num): if i == 1: tag_pos = 'A%s' % i tmp.write_row(tag_pos, tag_name) else: con_pos = 'A%s' % i content = fin_info_list[i-1] tmp.write_row(con_pos, content) book.close()
if __name__ == '__main__': file_name = input(r'抓取完成,输入文件名保存:') fin_save_list = [] page = get_page(base_url) search_dict = get_search(page, 'r-') for k in search_dict: print(r'************************一级抓取:正在抓取【%s】************************' % k) url = search_dict[k] second_page = get_page(url) second_search_dict = get_search(second_page, 'b-') search_dict[k] = second_search_dict for k in search_dict: second_dict = search_dict[k] for s_k in second_dict: print(r'************************二级抓取:正在抓取【%s】************************' % s_k) url = second_dict[s_k] third_page = get_page(url) third_search_dict = get_search(third_page, 'w-') print('%s>%s' % (k, s_k)) second_dict[s_k] = third_search_dict fin_info_list = get_info_list(search_dict, layer, tmp_list, search_list) fin_info_pn_list = get_info_pn_list(fin_info_list) p = Pool(8) assignment_list = assignment_search_list(fin_info_pn_list, 6) result = [] for i in range(len(assignment_list)): result.append(p.apply_async(get_info, args=(assignment_list[i], i))) p.close() p.join() for result_i in range(len(result)): fin_info_result_list = result[result_i].get() fin_save_list.extend(fin_info_result_list) save_excel(fin_save_list, file_name) endtime = datetime.datetime.now() time = (endtime - starttime).seconds print('总共用时:%s s' % time)
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