callback log_failed_attempt added

README.md

@@ -8,6 +8,10 @@ Stuff I frequently use in various unrelated projects that deal with web requests
 
 Makes it more convenient to run awaitable objects in concurrent batches.
 
+### log_failed_attempt
+
+Prototypical `callback` argument for the `attempt` decorator.
+
 ## Decorators
 
 ### @in_async_session

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = webutils-df
-version = 0.1.1
+version = 0.1.2
 author = Daniil F.
 author_email = mail@placeholder123.to
 description = Miscellaneous web utilities

src/webutils_df/__init__.py

@@ -1,5 +1,6 @@
 from .util import (
     in_async_session,
     attempt,
+    log_failed_attempt,
     gather_in_batches
 )

src/webutils_df/util.py

@@ -147,6 +147,12 @@ def attempt(_func: AsyncFunction = None, *,
     return decorator if _func is None else decorator(_func)
 
 
+async def log_failed_attempt(f: Callable, e: Exception, n: int, delay: float, args: tuple, kwargs: dict) -> None:
+    """Intended to be the prototypical `callback` argument for the `attempt` decorator above."""
+    arg_str = f"{', '.join(repr(arg) for arg in args)}, {', '.join(f'{k}={repr(v)}' for k, v in kwargs.items())}"
+    logger.warning(f"Attempt {n} at {f.__name__}({arg_str}) failed with {repr(e)}; retrying after {delay} seconds.")
+
+
 async def gather_in_batches(batch_size: int, *aws: Awaitable, return_exceptions: bool = False) -> list:
     """
     Simple extension of the `asyncio.gather` function to make it easy to run awaitable objects in concurrent batches.