你可以用 collections.Counter 计算每个数字的出现次数,然后用 *

>>> from collections import Counter
>>> c = [1, 2, 3, 4, 4, 5, 4]
>>> count = Counter(c)
>>> d = [x if count[x] == 1 else '*' for x in c]
>>> d
[1, 2, 3, '*', '*', 5, '*']

首先,您需要获取下拉菜单中列出的所有公司的所有选项值。例如,来自 <option value="MQ==">Banking, Insurance, Moneylending Trading (Group 1)</option> ,你需要 MQ== . 使用这些值,您可以使用以下代码直接访问ajax请求:

import requests
from bs4 import BeautifulSoup

r = requests.get('http://www.mpcci.com/members_list.php')
soup = BeautifulSoup(r.text, 'lxml')

companies = [option['value'] for option in soup.select('#select_gp_id option')[1:]]
for company in companies:
    r = requests.post('http://www.mpcci.com/get_members.php', data={'select': company})
    soup = BeautifulSoup(r.text, 'lxml')
    # scrape each company's information

请求url、表单数据和请求方法都可以在开发人员工具的网络部分找到。