Question

我正在使用eel创建一个桌面应用程序。但是，我在同时运行函数时遇到问题。

鳗鱼的想法是它允许电子通过JS与Python通信。因此，我在鳗鱼UI中创建了一个按钮，该按钮运行程序的一部分（多个异步aiohttp会话）。运行这些函数的函数被定义为异步的，即async def main():。 main()运行的所有功能也是异步的。这是该程序的概述：

import eel
import asyncio
from aiohttp import ClientSession

options = {
    'mode': 'custom',
    'args': ['node_modules/electron/dist/electron.exe', '.'],
}


@eel.expose
async def start_program():  # this is run when the user clicks the run button
    await main()


@eel.expose
async def test_print():  # this is run when the user clicks the test button
    print("test")


async def main():
    tasks = []
    loop = asyncio.get_event_loop()
    for i in range(instances):
        task = asyncio.ensure_future(launch(url))
        tasks.append(task)
    loop.run_until_complete(asyncio.wait(tasks))


async def launch(url):
    done = False
    async with ClientSession() as session:
        while not done:
            async with session.get(url, timeout=40) as initial:
                html_text = await initial.text()
                if x in html_text:
                    done = True
        await session.close()



if __name__ == "__main__":
    eel.init('web')
    eel.start('html/index.html', options=options)

然后在我的JavaScript中，我有：

async function start_program_js() { // this is run when the user clicks the run button
    await eel.start_program()();
}

async function test_print_js() { // this is run when the user clicks the test button
    await eel.test_print()();
}

因此，所需的输出是，一旦我已经按下“运行”按钮，然后单击“测试”按钮，它将打印“测试”。但是，目前，它们都没有运行。通过将async def main():更改为def main():，将async def start_program():更改为def start_program():，将async def test_print():更改为def test_print():，可以使“运行”工作。然后在JS中将其更改为

function start_program_js() { // this is run when the user clicks the run button
    eel.start_program();
}

function test_print_js() { // this is run when the user clicks the test button
    eel.test_print();
}

但是，现在我的问题是，如果我已经单击“运行”，则“测试”按钮将不执行任何操作。它本身可以工作，但是如果正在运行“ run”，则不能工作。

我认为我首先详细介绍的异步方法会起作用，但是使用该方法并单击“运行”会导致此错误：

Traceback (most recent call last):
  File "src\gevent\greenlet.py", line 766, in gevent._greenlet.Greenlet.run
  File "C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\site-packages\eel\__init__.py", line 209, in _process_message
    'value': return_val    }))
  File "C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\json\__init__.py", line 231, in dumps
    return _default_encoder.encode(obj)
  File "C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\json\encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\json\encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\json\encoder.py", line 179, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type coroutine is not JSON serializable
2019-06-03T13:00:59Z <Greenlet at 0x4f4b4b0: _process_message({'call': 6.074835210306471, 'name': 'start_program', 'ar, <geventwebsocket.websocket.WebSocket object at 0x0)> failed with TypeError

C:\Users\x\AppData\Local\Programs\Python\Python37-32\lib\site-packages\gevent\libuv\loop.py:193: RuntimeWarning: coroutine 'start_program' was never awaited
  super(loop, self)._run_callbacks()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback

有人知道我该如何解决这个问题？

谢谢。

编辑：我刚刚注意到自述文件中有一个异步部分。我试图复制它，但是无法正常工作。我尝试过

@eel.expose
def start_program():  # this is run when the user clicks the run button
    eel.spawn(main)


@eel.expose
def test_print():  # this is run when the user clicks the test button
    eel.spawn(test_print_x)


def test_print_x():
    print("test")

但是，我遇到了与以前相同的问题，即它没有运行“测试”按钮功能。

带有Eel的异步Python

0 个答案: