How to group elements of loop in a single list index

I have a for loop in python which extracts data using beautifulsoup from a website and appends them into a list. I am trying to scrap tags from event names ex: AI, Big Data, ML etc.

My code:

import requests
from bs4 import BeautifulSoup

URL = "https://aiml.events/"
page = requests.get(URL)
soup = BeautifulSoup(page.content, 'lxml')

# Scrape Event Tags
event_tags_list = []
event_tag_div = soup.find_all('div', class_ = 'card-body')
for event_div in event_tag_div:
  event_span = event_div.find_all('span', class_  = 'badge badge-light badge-pill')
  for event_tags in event_span:
    print(event_tags.text)
     

Tags I want to fetch

I am able to fetch the tags but they are all independent. I want to be able to group them together. Currently my list is like this:

tag_list = ['Artificial Intelligence', 'Artificial Intelligence','Machine Learning', 'Healthcare', 'Artificial Intelligence','Public Sector' ] 

My expectation:

tag_list = ['Artificial Intelligence', 'Artificial Intelligence,Machine Learning, Healthcare', 'Artificial Intelligence,Public Sector' ] 

Any help is appreciated. Sorry if the question is too basic.

Answer

Replace the inner loop with a generator that you join into a string.

for event_div in event_tag_div:
    event_span = event_div.find_all('span', class_  = 'badge badge-light badge-pill')
    event_tag_list.append(','.join(event_tag.text for event_tag in event_span))