【Python requests多页面爬取案例】

"```python

import requests

from fake_useragent import UserAgent # 随机ua库

class Boring():

def __init__(self, page_scope=(4, 7)):
    """
    :param page_scope: 页码范围
    """
    self.page_scope = page_scope
    self.all_id = self.get_all_company_id()
    self.enterprise_info = self.get_all_company_info()
    self.show_enterprise_info()

@property
def firefox_ua(self):
    """返回随机火狐UA头"""
    ua = UserAgent(use_cache_server=False)
    return {'User-Agent': ua.Firefox}  # ua.Firefox:随机生成火狐浏览器UA

def get_all_company_id(self):
    """
    将返回指定页码数内的公司的id
    :param start_page: 起始页码
    :param end_page: 结束页码
    """
    all_id = {}
    url = 'http://125.35.6.84:81/xk/itownet/portalAction.do?method=getXkzsList'  # 此连接见图1
    for page in range(self.page_scope[0], self.page_scope[1] + 1):
        json_text = requests.post(url, data=self.post_data(page), headers=self.firefox_ua).json()
        current_page_all_id = [dict['ID'] for dict in json_text['list']]
        all_id.setdefault(page, current_page_all_id)
    return all_id

def get_all_company_info(self):
    """开始获取公司信息"""
    url = 'http://125.35.6.84:81/xk/itownet/portalAction.do?method=getXkzsById'  # 见图3
    enterprise_info = {}
    for page in self.all_id:
        for id in self.all_id.get(page):
            response = requests.post(url, data={'id': id}, headers=self.firefox_ua)  # data={'id': id}:见图4
            if response.headers['Content-Type'] == 'application/json;charset=UTF-8':
                json_text = response.json()
                enterprise_info.setdefault(json_text.get('businessPerson'), json_text.get('epsName'))
                # 这里仅获取企业负责人和企业名
    return enterprise_info

def show_enterprise_info(self):
    [print(k, v) for k, v in self.enterprise_info.items()]

def post_data(self, page):
    """获取公司列表时要提交的form"""
    return {
        'on': 'true',
        'page': page,
        'pageSize': '15',
        'productName': '',
        'conditionType': '1',
        'applyname': '',
        'applysn': '',
    }  # 见图2

go

Boring()

"