First, install a later version of Python (3.8.x is preferred as of this message), and run python3.8 bot.py or py -3.8 bot.py (for Windows) when running your bot. Note: when installing, don't forget to choose "Add Python to PATH".

在 v3.3 中將異步請求引入 Python，如果如果您運行的是 v3.3 之前的 Python(包括 v2.X)，則必須安裝更新版本的 Python.

Asynchronous requests were introduced to Python in v3.3, if you're running Python prior to v3.3 (including v2.X), you'll have to install a newer version of Python.

僅在您運行 Python 3.3 時:asyncio 不是標準庫的一部分，你需要從 pypi 手動安裝它:

Only if you are running Python 3.3: asyncio is not part of the stdlib, you'll need to install it manually from pypi:

pip install asyncio

async 和 await 關鍵字僅對 Python 3.5 或更新版本有效.如果您使用的是 Python 3.3 或 3.4，則需要對代碼進行以下更改:

The async and await keywords are only valid for Python 3.5 or newer. If you're using Python 3.3 or 3.4, you will need to make the following changes to your code:

1. 使用 @asyncio.coroutine 裝飾器代替 async 語句:

1. Use the @asyncio.coroutine decorator instead of the async statement:

async def func():
    pass

# replace to:

@asyncio.coroutine
def func():
    pass

1. 使用 yield from 而不是 await:

1. Use yield from instead of await:

await coroutine() 

# replace to:

yield from coroutine()

這是您的函數需要更改為的示例(如果您使用的是 3.3-3.4):

Here is an example of what your function need to change into (if you're on 3.3-3.4):

import asyncio

@asyncio.coroutine 
def background_loop():
    yield from client.wait_until_ready()
    while not client.is_closed:
        channel = client.get_channel("************")
        messages = ["Hello!", "How are you doing?", "Testing!!"]
        yield from client.send_message(channel, random.choice(messages))
        yield from asyncio.sleep(120)

較新版本的 Python 3 仍然支持上述語法，但如果不需要支持 Python 3.3-3.4，建議使用 await 和 async.您可以參考這個 文檔，這里有一個簡短的片段:

The aforementioned syntax is still supported in newer versions of Python 3, but it is recommended to use await and async if there's no need to support for Python 3.3-3.4. You can refer back to this documentation, here's a short snippet:

async def 類型的協程是在 Python 3.5 中添加的，并且是如果不需要支持較舊的 Python 版本，建議使用.

The async def type of coroutine was added in Python 3.5, and is recommended if there is no need to support older Python versions.

旁白:

discord.py 目前支持 3.4.2-3.6.6，(不支持 3.3-3.4.1，截至 2019 年 1 月為 3.7).

Aside:

discord.py currently supports 3.4.2-3.6.6, (It does not support 3.3-3.4.1, 3.7 as of January 2019).

對于使用 discord.py 進行開發，我建議使用 discord.py 重寫分支:

For developing with discord.py, I suggest using the discord.py rewrite branch:

discord.py-重寫支持3.5.3-3.7.

discord.py-rewrite supports 3.5.3-3.7.

這篇關于帶有 async def 的 Python [無效語法]的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！