html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/datasette/issues/2078#issuecomment-1563308919,https://api.github.com/repos/simonw/datasette/issues/2078,1563308919,IC_kwDOBm6k_c5dLjN3,9599,2023-05-25T18:08:34Z,2023-05-25T18:08:34Z,OWNER,"After much fiddling this seems to work:
```python
import asyncio, types

def is_async_callable(obj):
    if not callable(obj):
        raise ValueError(""Object is not callable"")

    if isinstance(obj, types.FunctionType):
        return asyncio.iscoroutinefunction(obj)
        
    if hasattr(obj, '__call__'):
        return asyncio.iscoroutinefunction(obj.__call__)

    raise ValueError(""Not a function and has no __call__ attribute"")
```
Tested like so:
```python
class AsyncClass:
    async def __call__(self):
        pass

class NotAsyncClass:
    def __call__(self):
        pass

class ClassNoCall:
    pass
    
async def async_func():
    pass

def non_async_func():
    pass

for thing in (AsyncClass(), NotAsyncClass(), ClassNoCall(), async_func, non_async_func):
    try:
        print(thing, is_async_callable(thing))
    except Exception as ex:
        print(thing, ex)
```
```
<__main__.AsyncClass object at 0x106c32150> True
<__main__.NotAsyncClass object at 0x106c32390> False
<__main__.ClassNoCall object at 0x106c32750> Object is not callable
<function async_func at 0x1073d5120> True
<function non_async_func at 0x1073d5080> False
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1726236847,