8000 调用模块的过程中存在`asynchronous comprehension outside async function`的问题 · Issue #19 · TrueRou/maimai.py · GitHub
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调用模块的过程中存在asynchronous comprehension outside async function的问题 #19

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shinyashen opened this issue Jun 11, 2025 · 1 comment
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调用模块的过程中存在asynchronous comprehension outside async function的问题 #19

shinyashen opened this issue Jun 11, 2025 · 1 comment
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环境信息
Python 版本: 3.10.18
操作系统: Linux
调用环境: 在HoshinoBot (基于 NoneBot 的 QQ 机器人框架)的插件中作为模块调用
问题文件: maimai_py/providers/local/__init__.py

问题描述
在插件代码文件中导入 maimai_py 模块后运行bot时，遇到以下错误：

ERROR: asynchronous comprehension outside of an asynchronous function (File "/maimai_py/providers/local/__init__.py", line 94)
SyntaxError: asynchronous comprehension outside of an asynchronous function

错误发生在 LocalProvider.get_areas 方法中，具体是在尝试在列表推导式中使用 await 调用：

songs=[
    AreaSong(
        id=s.id if (s := await maimai_songs.by_title(song["title"])) else None,
        # ...
    )
    for song in item["songs"]
]

可能的原因
试着让ai分析了一下，得到的回答如下：

问题在于 Python 不允许在同步上下文（如列表推导式）中使用 await 关键字。虽然 get_areas 是异步函数，但内部的列表推导式仍然是同步执行上下文。
具体来说：
- Python 3.10 不允许在列表推导式中使用 await
- 这会导致语法错误，因为编译器无法正确处理这种结构
- 错误发生在模块导入阶段，因此会阻止整个模块加载

ai给出的解决方案是把返回值的列表推导式改为显式的异步循环，我按照ai给出的方案修改了包代码确实可以正常运行了
@TrueRou TrueRou added the bug Something isn't working label Jun 12, 2025
@TrueRou TrueRou self-assigned this Jun 12, 2025
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TrueRou commented Jun 12, 2025

附加原Issues: python/cpython#77527

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