Добрый вечер. Я сделал онлайн чат по этому уроку:
Ссылка. Все работает кроме... когда выходишь из чата не работает кнопка Back to chat, должно возвращать в чат, не работает
Вот код:
from pywebio import start_server
from pywebio.input import *
from pywebio.output import *
from pywebio.session import run_async, run_js
import asyncio
chat_msgs = []
online_users = set()
MAX_MESSAGES_COUNT = 100
async def main():
global chat_msgs
put_markdown("## Welcome to online chat")
msg_box = output()
put_scrollable(msg_box, height=300, keep_bottom=True)
nickname = await input("Log in chat", required=True, placeholder="Your name", validate=lambda n: "This nickname is already in use" if n in online_users or n == '' else None)
online_users.add(nickname)
chat_msgs.append(('', f"`{nickname}` joined the chat!"))
msg_box.append(put_markdown(f"`{nickname}` joined the chat!"))
refresh_task = run_async(refresh_msg(nickname, msg_box))
while True:
data = await input_group(" New message", [
input(placeholder="Message text", name="msg"),
actions(name="cmd", buttons=["Send", {'label':"Leave the chat", 'type':'cancel'}])
], validate=lambda m: ('msg', "Enter your message!") if m["cmd"] == "Send" and not m["msg"] else None)
if data is None:
break
msg_box.append(put_markdown(f"`{nickname}`: {data['msg']}"))
chat_msgs.append((nickname, data['msg']))
# exit chat
refresh_task.close()
online_users.remove(nickname)
toast("You left chat!")
msg_box.append(put_markdown(f" User `{nickname}` leave the chat!"))
chat_msgs.append(('', f"User `{nickname}` leave the chat!"))
*****вот тут проблема*****put_buttons(["Back to chat"], onclick=lambda btn: run_js('window.location.reload('))
async def refresh_msg(nickname, msg_box):
global chat_msgs
last_idx = len(chat_msgs)
while True:
await asyncio.sleep(1)
for m in chat_msgs[last_idx:]:
if m[0] != nickname:
msg_box.append(put_markdown(f"`{m[0]}`: {m[1]}"))
# remove expired
if len(chat_msgs) > MAX_MESSAGES_COUNT:
chat_msgs = chat_msgs[len(chat_msgs) // 2:]
last_idx = len(chat_msgs)
if __name__ == "__main__":
start_server(main, debug=True, port=8080, cdn=False)
Простой
