64 lines
1.6 KiB
Python
64 lines
1.6 KiB
Python
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import inspect
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import asyncio
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from typing import Any, Callable, Coroutine, TypeVar
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from typing_extensions import ParamSpec
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P = ParamSpec("P")
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R = TypeVar("R")
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def async_to_sync(func: Callable[P, Coroutine[Any, Any, R]]) -> Callable[P, R]:
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"""A function decorator that converts an async function to a sync function.
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This should generally not be used in production code paths.
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"""
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def sync_wrapper(*args, **kwargs): # type: ignore
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loop = None
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try:
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loop = asyncio.get_event_loop()
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except RuntimeError:
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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if loop.is_running():
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return func(*args, **kwargs)
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result = loop.run_until_complete(func(*args, **kwargs))
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def convert_result(result: Any) -> Any:
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if isinstance(result, list):
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return [convert_result(r) for r in result]
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if isinstance(result, object):
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return async_class_to_sync(result)
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if callable(result):
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return async_to_sync(result)
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return result
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return convert_result(result)
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return sync_wrapper
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T = TypeVar("T")
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def async_class_to_sync(cls: T) -> T:
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"""A decorator that converts a class with async methods to a class with sync methods.
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This should generally not be used in production code paths.
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"""
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for attr, value in inspect.getmembers(cls):
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if (
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callable(value)
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and inspect.iscoroutinefunction(value)
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and not attr.startswith("__")
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):
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setattr(cls, attr, async_to_sync(value))
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return cls
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