Question

我如何运行一个异步循环，同时为 websocket 接收和 tkinter gui 运行一个 while 循环？

我当前的代码：（没有 GUI）

我知道如何为 tkinter gui 编写代码，但在编译时遇到问题。启动 tkinter Mainloop 时，asyncio 循环停止并与 websocket 断开连接。我也尝试过线程，但都没有奏效。

import re

urls = [
    '<a href=https://energyplus.net/weather-download/asia_wmo_region_2/IND//IND_Kota.424520_ISHRAE/IND_Kota.424520_ISHRAE.epw>Download Weather File</a>',
    '<a href=https://energyplus.net/weather-download/europe_wmo_region_6/ESP//ESP_Alicante.083600_SWEC/ESP_Alicante.083600_SWEC.epw>Download Weather File</a>'
]

for url in urls:
    match = re.search(r'href=[\'"]?((?!.*SWEC)[^\'" >]+)', url)
    if match:
        url = match.group(1)
        print(url)

# https://energyplus.net/weather-download/asia_wmo_region_2/IND//IND_Kota.424520_ISHRAE/IND_Kota.424520_ISHRAE.epw

Answer 1

问题更新：我尝试将 asyncio 和 tkinter 与使用 thrading 结合起来

有点乱

import asyncio
import threading
import tkinter

event = None

async def start(queue):
    event = asyncio.Event()
    tkinter.Button(text="Button", command=button(queue)).pack()
    queue.clear()
    while True:
        await queue.wait()
        #await asyncio.sleep(1)
        print("test")
        queue.clear()


async def gui():
    win.mainloop()


def start_loop():

    global loop
    loop = asyncio.new_event_loop()
    asyncio.set_event_loop(loop)
    loop.create_task(start(event))
    loop.run_forever()


threading.Thread(target=start_loop).start()


def button(queue):
    print("button")
    global loop
    asyncio.run_coroutine_threadsafe(loop=loop, coro=que(queue))

async def que(event):
    print("que")
    await event.set()

win = tkinter.Tk()
win.mainloop()

当我按下按钮时，什么也没有发生

Answer 2

我找到了一个使用线程、asyncio 和 websockets 的可行解决方案：

import tkinter
import asyncio
import threading
import websockets
from websockets import exceptions
import json
from datetime import datetime


# Starthilfe für asynkrone Funktion connect
def _asyncio_thread():
    async_loop.create_task(connect())
    async_loop.run_forever()


async def connect():
    try:
        async with websockets.connect("ws://194.163.132.218:8765") as websocket:
            while True:
                message = await websocket.recv()
                print(message)


async def send(websocket, name):
    while True:
        message = await queue.get()
        await websocket.send(msg)

def buttonexecutor(e=None):
    msg = entry.get()
    asyncio.run_coroutine_threadsafe(messagesender(msg), async_loop)
    entry.delete(0, "end")


async def messagesender(message):
    await queue.put(message)


def logger(reason, message):
    now = datetime.now()
    current_time = now.strftime("%H:%M:%S")
    text.configure(state="normal")
    text.insert("end", f"({current_time}) [ {reason} ] {message}\n")
    text.configure(state="disabled")


if __name__ == '__main__':
    # Asyncio
    async_loop = asyncio.get_event_loop()
    queue = asyncio.Queue()

    # Erstelle tkinter
    root = tkinter.Tk()
    root.title("Messanger")

    text = tkinter.Text(root, width=150, state="disabled")
    text.pack()

    entry = tkinter.Entry(root, state="disabled", width=100)
    entry.pack()

    tkinter.Button(master=root, text="Senden", command=buttonexecutor).pack()

    # Starte Websocket Verbindung
    thread = threading.Thread(target=_asyncio_thread).start()

    # Starte tkinter
    root.mainloop()

运行 asyncio 循环和 tkinter gui

2 个答案: