pip install pytchat

from pytchat import LiveChat

chat = LiveChat("rsHWP7IjMiw")
while chat.is_alive():
  data = chat.get()
  for c in data.items:
    print(f"{c.datetime} [{c.author.name}]-{c.message} {c.amountString}")
    data.tick()

from pytchat import LiveChat
import time

#callback function is automatically called.
def display(data):
  for c in data.items:
    print(f"{c.datetime} [{c.author.name}]-{c.message} {c.amountString}")
    data.tick()

if __name__ == '__main__':
  chat = LiveChat("rsHWP7IjMiw", callback = display)
  while chat.is_alive():
    #other background operation.
    time.sleep(3)

from pytchat import LiveChatAsync
from concurrent.futures import CancelledError
import asyncio

async def main():
  chat = LiveChatAsync("rsHWP7IjMiw", callback = func)
  while chat.is_alive():
    #other background operation.
    await asyncio.sleep(3)

#callback function is automatically called.
async def func(data):
  for c in data.items:
    print(f"{c.datetime} [{c.author.name}]-{c.message} {c.amountString}")
    await data.tick_async()

if __name__ == '__main__':
  try:
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())
  except CancelledError:
    pass

from pytchat import LiveChat, CompatibleProcessor
import time

chat = LiveChat("rsHWP7IjMiw", 
  processor = CompatibleProcessor() )

while chat.is_alive():
  data = chat.get()
  polling = data['pollingIntervalMillis']/1000
  for c in data['items']:
    if c.get('snippet'):
      print(f"[{c['authorDetails']['displayName']}]"
            f"-{c['snippet']['displayMessage']}")
      time.sleep(polling/len(data['items']))

from pytchat import LiveChat

def main():
  #seektime (seconds): start position of chat.
  chat = ReplayChat("ojes5ULOqhc", seektime = 60*30)
  while chat.is_alive():
    data = chat.get()
    for c in data.items:
      print(f"{c.elapsedTime} [{c.author.name}]-{c.message} {c.amountString}")
      data.tick()

if __name__ == '__main__':
  main()