`trace_request_ctx` incorrect expected to be a mapping class, it can be any object.

[mabrowning]

This works with aiohttp:

import asyncio
import aiohttp
import time
from types import SimpleNamespace

def request_tracer():
    async def on_request_start(session, context, params):
        context.trace_request_ctx.request_start = time.perf_counter()

    async def on_headers_sent(session, context, params):
        context.trace_request_ctx.headers_sent = time.perf_counter()

    async def on_request_end(session, context, params):
        context.trace_request_ctx.request_end = time.perf_counter()

    trace_config = aiohttp.TraceConfig()

    trace_config.on_request_start.append(on_request_start)
    trace_config.on_request_headers_sent.append(on_headers_sent)
    trace_config.on_request_end.append(on_request_end)
    return trace_config


async def make_request(session, url):
    trace_times = SimpleNamespace(
        request_start=0,
        headers_sent=0,
        request_end=0,
    )
    async with session.get(url, trace_request_ctx=trace_times) as response:
        await response.text()
    return trace_times

async def main(): 
    async with aiohttp.ClientSession( 
        trace_configs=[request_tracer()]
    ) as session: 
        print(await make_request(session, "https://google.com/"))

asyncio.run(main())

e.g. printing

namespace(request_start=2316235.097936708, headers_sent=2316235.647196083, request_end=2316235.74696975)

But when I substitute in aiohttp_retry:

from aiohttp_retry import RetryClient 

async def main_with_retry(): 
    async with aiohttp.ClientSession( 
        trace_configs=[request_tracer()]
    ) as session: 
        session = RetryClient(client_session=session)
        print(await make_request(session, "https://google.com/"))
asyncio.run(main_with_retry())

I get an exception:

Traceback (most recent call last):
  File "<python-input-4>", line 9, in <module>
    asyncio.run(main_with_retry())
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "lib/python3.13/asyncio/runners.py", line 194, in run
    return runner.run(main)
           ~~~~~~~~~~^^^^^^
  File "lib/python3.13/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "lib/python3.13/asyncio/base_events.py", line 721, in run_until_complete
    return future.result()
           ~~~~~~~~~~~~~^^
  File "<python-input-4>", line 8, in main_with_retry
    print(await make_request(session, "https://google.com/"))
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<python-input-3>", line 30, in make_request
    async with session.get(url, trace_request_ctx=trace_times) as response:
               ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "lib/python3.13/site-packages/aiohttp_retry/client.py", line 158, in __aenter__
    return await self._do_request()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "lib/python3.13/site-packages/aiohttp_retry/client.py", line 123, in _do_request
    trace_request_ctx={
                      ^
    ...<2 lines>...
    },
    ^
TypeError: 'types.SimpleNamespace' object is not a mapping