vCalendar Outlook的一个事件下有多个日期

Question

如何正确格式化vCalendar输出到Outlook，以在一个事件下保存多个日期？

import socket
from time import sleep
import os

host = 'localhost'
port = 17020

os.chdir(os.getcwd()+'/Data')

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((host, port))
s.listen(1)
while True:
    print("Listening for a client at",host , port)
    conn, addr = s.accept()
    print("Connected by", addr)
    try:
        print("Reading file...")
        with open('cdr_data.csv') as f:
            for line in f:
                out = line.encode('utf-8')
                print('Sending line',line)
                conn.send(out)
                # sleep(10)
            print('End Of Stream.')
    except socket.error:
        print ("Error Occured. Client disconnected.")
conn.close()