使用爬虫获取链家二手房数据，并对其中的二手房进行行为特征解析

    import numpy as np
    import pandas as pd
    import matplotlib.pyplot as plt
    from bs4 import BeautifulSoup
    import requests
    
    

    def generate_web_link(districts):
    '''此函数生成武汉地区所有区域二手房网页链接地址'''
    page_urls = [] 
    base_url = 'https://wh.lianjia.com/ershoufang/{}'
    for district in districts:
        district_url = base_url.format(district)
        res = requests.get(district_url).content.decode('utf-8')
        soup = BeautifulSoup(res,'lxml')
        totalpage = int(eval(soup.find('div',{'class':'page-box house-lst-page-box'})['page-data'])['totalPag