examples/debugging/multi_subactors.py

@@ -38,7 +38,6 @@ async def main():
     """
     async with tractor.open_nursery(
         debug_mode=True,
-        # loglevel='runtime',
     ) as n:
 
         # Spawn both actors, don't bother with collecting results

examples/debugging/subactor_breakpoint.py

@@ -3,20 +3,17 @@ import tractor
 
 
 async def breakpoint_forever():
-    '''
+    """Indefinitely re-enter debugger in child actor.
-    Indefinitely re-enter debugger in child actor.
+    """
-
-    '''
     while True:
         await trio.sleep(0.1)
-        await tractor.pause()
+        await tractor.breakpoint()
 
 
 async def main():
 
     async with tractor.open_nursery(
         debug_mode=True,
-        loglevel='cancel',
     ) as n:
 
         portal = await n.run_in_actor(

tests/test_context_stream_semantics.py

@@ -246,10 +246,10 @@ def test_simple_context(
             trio.run(main)
         except error_parent:
             pass
-        except BaseExceptionGroup as beg:
+        except trio.MultiError as me:
             # XXX: on windows it seems we may have to expect the group error
             from tractor._exceptions import is_multi_cancelled
-            assert is_multi_cancelled(beg)
+            assert is_multi_cancelled(me)
     else:
         trio.run(main)
 

tests/test_legacy_one_way_streaming.py

@@ -38,13 +38,10 @@ async def async_gen_stream(sequence):
     assert cs.cancelled_caught
 
 
-# TODO: deprecated either remove entirely
-# or re-impl in terms of `MsgStream` one-sides
-# wrapper, but at least remove `Portal.open_stream_from()`
 @tractor.stream
 async def context_stream(
     ctx: tractor.Context,
-    sequence: list[int],
+    sequence
 ):
     for i in sequence:
         await ctx.send_yield(i)

tractor/_child.py

@@ -36,7 +36,6 @@ def parse_ipaddr(arg):
 
 
 if __name__ == "__main__":
-    __tracebackhide__: bool = True
 
     parser = argparse.ArgumentParser()
     parser.add_argument("--uid", type=parse_uid)

tractor/_context.py

@@ -47,7 +47,6 @@ import trio
 from ._exceptions import (
     ContextCancelled,
     InternalError,
-    MsgTypeError,
     RemoteActorError,
     StreamOverrun,
     pack_from_raise,
@@ -60,14 +59,12 @@ from .msg import (
     MsgType,
     MsgCodec,
     NamespacePath,
-    PayloadT,
     Return,
     Started,
     Stop,
     Yield,
     current_codec,
     pretty_struct,
-    types as msgtypes,
 )
 from ._ipc import Channel
 from ._streaming import MsgStream
@@ -91,10 +88,7 @@ async def _drain_to_final_msg(
     hide_tb: bool = True,
     msg_limit: int = 6,
 
-) -> tuple[
+) -> list[dict]:
-    Return|None,
-    list[MsgType]
-]:
     '''
     Drain IPC msgs delivered to the underlying rx-mem-chan
     `Context._recv_chan` from the runtime in search for a final
@@ -115,7 +109,6 @@ async def _drain_to_final_msg(
     # basically ignoring) any bi-dir-stream msgs still in transit
     # from the far end.
     pre_result_drained: list[MsgType] = []
-    return_msg: Return|None = None
     while not (
         ctx.maybe_error
         and not ctx._final_result_is_set()
@@ -176,6 +169,8 @@ async def _drain_to_final_msg(
             # pray to the `trio` gawds that we're corrent with this
             # msg: dict = await ctx._recv_chan.receive()
             msg: MsgType = await ctx._recv_chan.receive()
+            # always capture unexpected/non-result msgs
+            pre_result_drained.append(msg)
 
         # NOTE: we get here if the far end was
         # `ContextCancelled` in 2 cases:
@@ -212,13 +207,11 @@ async def _drain_to_final_msg(
                 # if ctx._recv_chan:
                 #     await ctx._recv_chan.aclose()
                 # TODO: ^ we don't need it right?
-                return_msg = msg
                 break
 
             # far end task is still streaming to us so discard
             # and report depending on local ctx state.
             case Yield():
-                pre_result_drained.append(msg)
                 if (
                     (ctx._stream.closed
                      and (reason := 'stream was already closed')
@@ -243,10 +236,7 @@ async def _drain_to_final_msg(
 
                         f'{pformat(msg)}\n'
                     )
-                    return (
+                    return pre_result_drained
-                        return_msg,
-                        pre_result_drained,
-                    )
 
                 # drain up to the `msg_limit` hoping to get
                 # a final result or error/ctxc.
@@ -270,7 +260,6 @@ async def _drain_to_final_msg(
             # -[ ] should be a runtime error if a stream is open right?
             # Stop()
             case Stop():
-                pre_result_drained.append(msg)
                 log.cancel(
                     'Remote stream terminated due to "stop" msg:\n\n'
                     f'{pformat(msg)}\n'
@@ -280,6 +269,7 @@ async def _drain_to_final_msg(
             # remote error msg, likely already handled inside
             # `Context._deliver_msg()`
             case Error():
+
                 # TODO: can we replace this with `ctx.maybe_raise()`?
                 # -[ ]  would this be handier for this case maybe?
                 #     async with maybe_raise_on_exit() as raises:
@@ -346,7 +336,6 @@ async def _drain_to_final_msg(
             # XXX should pretty much never get here unless someone
             # overrides the default `MsgType` spec.
             case _:
-                pre_result_drained.append(msg)
                 # It's definitely an internal error if any other
                 # msg type without a`'cid'` field arrives here!
                 if not msg.cid:
@@ -363,10 +352,7 @@ async def _drain_to_final_msg(
             f'{ctx.outcome}\n'
         )
 
-    return (
+    return pre_result_drained
-        return_msg,
-        pre_result_drained,
-    )
 
 
 class Unresolved:
@@ -733,36 +719,21 @@ class Context:
         Return string indicating which task this instance is wrapping.
 
         '''
-        return 'parent' if self._portal else 'child'
+        return 'caller' if self._portal else 'callee'
 
-    @staticmethod
-    def peer_side(side: str) -> str:
-        match side:
-            case 'child':
-                return 'parent'
-            case 'parent':
-                return 'child'
-
-    # TODO: remove stat!
-    # -[ ] re-implement the `.experiemental._pubsub` stuff
-    #     with `MsgStream` and that should be last usage?
-    # -[ ] remove from `tests/legacy_one_way_streaming.py`!
     async def send_yield(
         self,
         data: Any,
+
     ) -> None:
-        '''
-        Deprecated method for what now is implemented in `MsgStream`.
 
-        We need to rework / remove some stuff tho, see above.
-
-        '''
         warnings.warn(
             "`Context.send_yield()` is now deprecated. "
             "Use ``MessageStream.send()``. ",
             DeprecationWarning,
             stacklevel=2,
         )
+        # await self.chan.send({'yield': data, 'cid': self.cid})
         await self.chan.send(
             Yield(
                 cid=self.cid,
@@ -771,11 +742,12 @@ class Context:
         )
 
     async def send_stop(self) -> None:
-        '''
+        # await pause()
-        Terminate a `MsgStream` dialog-phase by sending the IPC
+        # await self.chan.send({
-        equiv of a `StopIteration`.
+        #     # Stop(
-
+        #     'stop': True,
-        '''
+        #     'cid': self.cid
+        # })
         await self.chan.send(
             Stop(cid=self.cid)
         )
@@ -871,7 +843,6 @@ class Context:
 
         # self-cancel (ack) or,
         # peer propagated remote cancellation.
-        msgtyperr: bool = False
         if isinstance(error, ContextCancelled):
 
             whom: str = (
@@ -883,16 +854,6 @@ class Context:
                 f'{error}'
             )
 
-        elif isinstance(error, MsgTypeError):
-            msgtyperr = True
-            peer_side: str = self.peer_side(self.side)
-            log.error(
-                f'IPC dialog error due to msg-type caused by {peer_side!r} side\n\n'
-
-                f'{error}\n'
-                f'{pformat(self)}\n'
-            )
-
         else:
             log.error(
                 f'Remote context error:\n\n'
@@ -933,9 +894,9 @@ class Context:
             # if `._cancel_called` then `.cancel_acked and .cancel_called`
             # always should be set.
             and not self._is_self_cancelled()
+
             and not cs.cancel_called
             and not cs.cancelled_caught
-            and not msgtyperr
         ):
             # TODO: it'd sure be handy to inject our own
             # `trio.Cancelled` subtype here ;)
@@ -1040,7 +1001,7 @@ class Context:
         # when the runtime finally receives it during teardown
         # (normally in `.result()` called from
         # `Portal.open_context().__aexit__()`)
-        if side == 'parent':
+        if side == 'caller':
             if not self._portal:
                 raise InternalError(
                     'No portal found!?\n'
@@ -1462,10 +1423,7 @@ class Context:
             # wait for a final context result/error by "draining"
             # (by more or less ignoring) any bi-dir-stream "yield"
             # msgs still in transit from the far end.
-            (
+            drained_msgs: list[dict] = await _drain_to_final_msg(
-                return_msg,
-                drained_msgs,
-            ) = await _drain_to_final_msg(
                 ctx=self,
                 hide_tb=hide_tb,
             )
@@ -1483,10 +1441,7 @@ class Context:
 
             log.cancel(
                 'Ctx drained pre-result msgs:\n'
-                f'{pformat(drained_msgs)}\n\n'
+                f'{pformat(drained_msgs)}'
-
-                f'Final return msg:\n'
-                f'{return_msg}\n'
             )
 
         self.maybe_raise(
@@ -1653,13 +1608,7 @@ class Context:
 
     async def started(
         self,
-
+        value: Any | None = None
-        # TODO: how to type this so that it's the
-        # same as the payload type? Is this enough?
-        value: PayloadT|None = None,
-
-        strict_parity: bool = False,
-        complain_no_parity: bool = True,
 
     ) -> None:
         '''
@@ -1680,7 +1629,7 @@ class Context:
                 f'called `.started()` twice on context with {self.chan.uid}'
             )
 
-        started_msg = Started(
+        started = Started(
             cid=self.cid,
             pld=value,
         )
@@ -1701,54 +1650,28 @@ class Context:
         # https://zguide.zeromq.org/docs/chapter7/#The-Cheap-or-Nasty-Pattern
         #
         codec: MsgCodec = current_codec()
-        msg_bytes: bytes = codec.encode(started_msg)
+        msg_bytes: bytes = codec.encode(started)
         try:
             # be a "cheap" dialog (see above!)
-            if (
+            rt_started = codec.decode(msg_bytes)
-                strict_parity
+            if rt_started != started:
-                or
-                complain_no_parity
-            ):
-                rt_started: Started = codec.decode(msg_bytes)
 
-                # XXX something is prolly totes cucked with the
+                # TODO: break these methods out from the struct subtype?
-                # codec state!
+                diff = pretty_struct.Struct.__sub__(rt_started, started)
-                if isinstance(rt_started, dict):
-                    rt_started = msgtypes.from_dict_msg(
-                        dict_msg=rt_started,
-                    )
-                    raise RuntimeError(
-                        'Failed to roundtrip `Started` msg?\n'
-                        f'{pformat(rt_started)}\n'
-                    )
 
-                if rt_started != started_msg:
+                complaint: str = (
-                    # TODO: break these methods out from the struct subtype?
+                    'Started value does not match after codec rountrip?\n\n'
+                    f'{diff}'
+                )
+                # TODO: rn this will pretty much always fail with
+                # any other sequence type embeded in the
+                # payload...
+                if self._strict_started:
+                    raise ValueError(complaint)
+                else:
+                    log.warning(complaint)
 
-                    diff = pretty_struct.Struct.__sub__(
+            await self.chan.send(rt_started)
-                        rt_started,
-                        started_msg,
-                    )
-                    complaint: str = (
-                        'Started value does not match after codec rountrip?\n\n'
-                        f'{diff}'
-                    )
-
-                    # TODO: rn this will pretty much always fail with
-                    # any other sequence type embeded in the
-                    # payload...
-                    if (
-                        self._strict_started
-                        or
-                        strict_parity
-                    ):
-                        raise ValueError(complaint)
-                    else:
-                        log.warning(complaint)
-
-                # started_msg = rt_started
-
-            await self.chan.send(started_msg)
 
         # raise any msg type error NO MATTER WHAT!
         except msgspec.ValidationError as verr:
@@ -1759,7 +1682,7 @@ class Context:
                 src_validation_error=verr,
                 verb_header='Trying to send payload'
                 # > 'invalid `Started IPC msgs\n'
-            ) from verr
+            )
 
         self._started_called = True
 
@@ -1860,17 +1783,13 @@ class Context:
             else:
                 log_meth = log.runtime
 
-            side: str = self.side
-
-            peer_side: str = self.peer_side(side)
-
             log_meth(
-                f'Delivering IPC ctx error from {peer_side!r} to {side!r} task\n\n'
+                f'Delivering error-msg to caller\n\n'
 
-                f'<= peer {peer_side!r}: {from_uid}\n'
+                f'<= peer: {from_uid}\n'
                 f'  |_ {nsf}()\n\n'
 
-                f'=> {side!r} cid: {cid}\n'
+                f'=> cid: {cid}\n'
                 f'  |_{self._task}\n\n'
 
                 f'{pformat(re)}\n'
@@ -1885,7 +1804,6 @@ class Context:
             self._maybe_cancel_and_set_remote_error(re)
 
         # XXX only case where returning early is fine!
-        structfmt = pretty_struct.Struct.pformat
         if self._in_overrun:
             log.warning(
                 f'Queueing OVERRUN msg on caller task:\n'
@@ -1895,7 +1813,7 @@ class Context:
                 f'=> cid: {cid}\n'
                 f'  |_{self._task}\n\n'
 
-                f'{structfmt(msg)}\n'
+                f'{pformat(msg)}\n'
             )
             self._overflow_q.append(msg)
             return False
@@ -1909,7 +1827,7 @@ class Context:
                 f'=> {self._task}\n'
                 f'  |_cid={self.cid}\n\n'
 
-                f'{structfmt(msg)}\n'
+                f'{pformat(msg)}\n'
             )
 
             # NOTE: if an error is deteced we should always still
@@ -2129,9 +2047,6 @@ async def open_context_from_portal(
         # place..
         allow_overruns=allow_overruns,
     )
-    # ASAP, so that `Context.side: str` can be determined for
-    # logging / tracing / debug!
-    ctx._portal: Portal = portal
 
     assert ctx._remote_func_type == 'context'
     msg: Started = await ctx._recv_chan.receive()
@@ -2150,9 +2065,10 @@ async def open_context_from_portal(
             msg=msg,
             src_err=src_error,
             log=log,
-            expect_msg=Started,
+            expect_key='started',
         )
 
+    ctx._portal: Portal = portal
     uid: tuple = portal.channel.uid
     cid: str = ctx.cid
 

tractor/_entry.py

@@ -106,7 +106,6 @@ def _trio_main(
     Entry point for a `trio_run_in_process` subactor.
 
     '''
-    __tracebackhide__: bool = True
     _state._current_actor = actor
     trio_main = partial(
         async_main,

tractor/_exceptions.py

@@ -43,12 +43,9 @@ from tractor.msg import (
     MsgType,
     Stop,
     Yield,
+    pretty_struct,
     types as msgtypes,
 )
-from tractor.msg.pretty_struct import (
-    iter_fields,
-    Struct,
-)
 
 if TYPE_CHECKING:
     from ._context import Context
@@ -85,7 +82,7 @@ class InternalError(RuntimeError):
 _ipcmsg_keys: list[str] = [
     fi.name
     for fi, k, v
-    in iter_fields(Error)
+    in pretty_struct.iter_fields(Error)
 
 ]
 
@@ -324,7 +321,7 @@ class RemoteActorError(Exception):
             assert self.boxed_type is boxed_type
 
     @property
-    def ipc_msg(self) -> Struct:
+    def ipc_msg(self) -> pretty_struct.Struct:
         '''
         Re-render the underlying `._ipc_msg: Msg` as
         a `pretty_struct.Struct` for introspection such that the
@@ -337,12 +334,12 @@ class RemoteActorError(Exception):
         msg_type: MsgType = type(self._ipc_msg)
         fields: dict[str, Any] = {
             k: v for _, k, v in
-            iter_fields(self._ipc_msg)
+            pretty_struct.iter_fields(self._ipc_msg)
         }
         return defstruct(
             msg_type.__name__,
             fields=fields.keys(),
-            bases=(msg_type, Struct),
+            bases=(msg_type, pretty_struct.Struct),
         )(**fields)
 
     @property
@@ -644,11 +641,11 @@ class MsgTypeError(
 
     '''
     reprol_fields: list[str] = [
-        'expected_msg_type',
+        'payload_msg',
     ]
     extra_body_fields: list[str] = [
         'cid',
-        'expected_msg',
+        'payload_msg',
     ]
 
     @property
@@ -664,7 +661,9 @@ class MsgTypeError(
         return self.msgdata.get('_msg_dict')
 
     @property
-    def expected_msg(self) -> MsgType|None:
+    def payload_msg(
+        self,
+    ) -> MsgType|None:
         '''
         Attempt to construct what would have been the original
         `MsgType`-with-payload subtype (i.e. an instance from the set
@@ -675,17 +674,9 @@ class MsgTypeError(
         if msg_dict := self.msg_dict.copy():
             return msgtypes.from_dict_msg(
                 dict_msg=msg_dict,
-                # use_pretty=True,
-                # ^-TODO-^ would luv to use this BUT then the
-                # `field_prefix` in `pformat_boxed_tb()` cucks it
-                # all up.. XD
             )
         return None
 
-    @property
-    def expected_msg_type(self) -> Type[MsgType]|None:
-        return type(self.expected_msg)
-
     @property
     def cid(self) -> str:
         # pre-packed using `.from_decode()` constructor
@@ -938,6 +929,7 @@ def _raise_from_no_key_in_msg(
     src_err: KeyError,
     log: StackLevelAdapter,  # caller specific `log` obj
 
+    expect_key: str = 'yield',
     expect_msg: str = Yield,
     stream: MsgStream | None = None,
 
@@ -1052,7 +1044,7 @@ def _raise_from_no_key_in_msg(
     # is activated above.
     _type: str = 'Stream' if stream else 'Context'
     raise MessagingError(
-        f"{_type} was expecting a {expect_msg} message"
+        f"{_type} was expecting a '{expect_key.upper()}' message"
         " BUT received a non-error msg:\n"
         f'{pformat(msg)}'
     ) from src_err

tractor/_ipc.py

@@ -130,8 +130,6 @@ def _mk_msg_type_err(
 
 ) -> MsgTypeError:
 
-    import textwrap
-
     # `Channel.send()` case
     if src_validation_error is None:  # send-side
 
@@ -211,24 +209,10 @@ def _mk_msg_type_err(
         msg, _, maybe_field = msgspec_msg.rpartition('$.')
         obj = object()
         if (field_val := msg_dict.get(maybe_field, obj)) is not obj:
-            field_name_expr: str = (
-                f' |_{maybe_field}: {codec.pld_spec_str} = '
-            )
-            fmt_val_lines: list[str] = pformat(field_val).splitlines()
-            fmt_val: str = (
-                f'{fmt_val_lines[0]}\n'
-                +
-                textwrap.indent(
-                    '\n'.join(fmt_val_lines[1:]),
-                    prefix=' '*len(field_name_expr),
-                )
-            )
             message += (
                 f'{msg.rstrip("`")}\n\n'
-                f'<{msg_type.__qualname__}(\n'
+                f'{msg_type}\n'
-                # f'{".".join([msg_type.__module__, msg_type.__qualname__])}\n'
+                f' |_.{maybe_field}: {codec.pld_spec_str} = {field_val!r}\n'
-                f'{field_name_expr}{fmt_val}\n'
-                f')>'
             )
 
         msgtyperr = MsgTypeError.from_decode(
@@ -354,7 +338,7 @@ class MsgpackTCPStream(MsgTransport):
                     # self._task = task
                     self._codec = codec
                     log.runtime(
-                        f'Using new codec in {self}.recv()\n'
+                        'Using new codec in {self}.recv()\n'
                         f'codec: {self._codec}\n\n'
                         f'msg_bytes: {msg_bytes}\n'
                     )
@@ -436,7 +420,7 @@ class MsgpackTCPStream(MsgTransport):
             if self._codec.pld_spec != codec.pld_spec:
                 self._codec = codec
                 log.runtime(
-                    f'Using new codec in {self}.send()\n'
+                    'Using new codec in {self}.send()\n'
                     f'codec: {self._codec}\n\n'
                     f'msg: {msg}\n'
                 )

tractor/_root.py

@@ -79,7 +79,6 @@ async def open_root_actor(
 
     # enables the multi-process debugger support
     debug_mode: bool = False,
-    maybe_enable_greenback: bool = False,  # `.pause_from_sync()/breakpoint()` support
 
     # internal logging
     loglevel: str|None = None,
@@ -108,16 +107,14 @@ async def open_root_actor(
     )
     if (
         debug_mode
-        and maybe_enable_greenback
+        and
-        and await _debug.maybe_init_greenback(
+        await _debug.maybe_init_greenback(
             raise_not_found=False,
         )
     ):
         os.environ['PYTHONBREAKPOINT'] = (
             'tractor.devx._debug.pause_from_sync'
         )
-        _state._runtime_vars['use_greenback'] = True
-
     else:
         # TODO: disable `breakpoint()` by default (without
         # `greenback`) since it will break any multi-actor
@@ -388,20 +385,14 @@ async def open_root_actor(
         _state._last_actor_terminated = actor
 
         # restore built-in `breakpoint()` hook state
-        if (
+        if debug_mode:
-            debug_mode
-            and
-            maybe_enable_greenback
-        ):
             if builtin_bp_handler is not None:
                 sys.breakpointhook = builtin_bp_handler
-
             if orig_bp_path is not None:
                 os.environ['PYTHONBREAKPOINT'] = orig_bp_path
-
             else:
                 # clear env back to having no entry
-                os.environ.pop('PYTHONBREAKPOINT', None)
+                os.environ.pop('PYTHONBREAKPOINT')
 
         logger.runtime("Root actor terminated")
 

tractor/_rpc.py

@@ -41,6 +41,7 @@ from trio import (
     TaskStatus,
 )
 
+from .msg import NamespacePath
 from ._ipc import Channel
 from ._context import (
     Context,
@@ -60,11 +61,6 @@ from .devx import (
 )
 from . import _state
 from .log import get_logger
-from .msg import (
-    current_codec,
-    MsgCodec,
-    NamespacePath,
-)
 from tractor.msg.types import (
     CancelAck,
     Error,
@@ -102,7 +98,6 @@ async def _invoke_non_context(
         Context | BaseException
     ] = trio.TASK_STATUS_IGNORED,
 ):
-    __tracebackhide__: bool = True
 
     # TODO: can we unify this with the `context=True` impl below?
     if inspect.isasyncgen(coro):
@@ -403,11 +398,7 @@ async def _invoke(
     __tracebackhide__: bool = hide_tb
     treat_as_gen: bool = False
 
-    if (
+    if _state.debug_mode():
-        _state.debug_mode()
-        and
-        _state._runtime_vars['use_greenback']
-    ):
         # XXX for .pause_from_sync()` usage we need to make sure
         # `greenback` is boostrapped in the subactor!
         await _debug.maybe_init_greenback()
@@ -521,22 +512,10 @@ async def _invoke(
         #     wrapper that calls `Context.started()` and then does
         #     the `await coro()`?
 
-        # ------ - ------
+        # a "context" endpoint type is the most general and
-        # a "context" endpoint is the most general and
+        # "least sugary" type of RPC ep with support for
-        # "least sugary" type of RPC with support for
         # bi-dir streaming B)
-        #
+        # StartAck
-        # the concurrency relation is simlar to a task nursery
-        # wherein a "parent" task (the one that enters
-        # `trio.open_nursery()` in some actor "opens" (via
-        # `Portal.open_context()`) an IPC ctx to another peer
-        # (which is maybe a sub-) actor who then schedules (aka
-        # `trio.Nursery.start()`s) a new "child" task to execute
-        # the `@context` annotated func; that is this func we're
-        # running directly below!
-        # ------ - ------
-        #
-        # StartAck: respond immediately with endpoint info
         await chan.send(
             StartAck(
                 cid=cid,
@@ -545,11 +524,11 @@ async def _invoke(
         )
 
         # TODO: should we also use an `.open_context()` equiv
-        # for this child side by factoring the impl from
+        # for this callee side by factoring the impl from
         # `Portal.open_context()` into a common helper?
         #
         # NOTE: there are many different ctx state details
-        # in a child side instance according to current impl:
+        # in a callee side instance according to current impl:
         # - `.cancelled_caught` can never be `True`.
         #  -> the below scope is never exposed to the
         #     `@context` marked RPC function.
@@ -575,7 +554,7 @@ async def _invoke(
 
             # NOTE: this happens IFF `ctx._scope.cancel()` is
             # called by any of,
-            # - *this* child task manually calling `ctx.cancel()`.
+            # - *this* callee task manually calling `ctx.cancel()`.
             # - the runtime calling `ctx._deliver_msg()` which
             #   itself calls `ctx._maybe_cancel_and_set_remote_error()`
             #   which cancels the scope presuming the input error
@@ -652,11 +631,10 @@ async def _invoke(
                         # f'  |_{ctx}'
                     )
 
-                    # task-contex was either cancelled by request
+                    # task-contex was either cancelled by request using
-                    # using ``Portal.cancel_actor()`` or
+                    # ``Portal.cancel_actor()`` or ``Context.cancel()``
-                    # ``Context.cancel()`` on the far end, or it
+                    # on the far end, or it was cancelled by the local
-                    # was cancelled by the local child (or callee)
+                    # (callee) task, so relay this cancel signal to the
-                    # task, so relay this cancel signal to the
                     # other side.
                     ctxc = ContextCancelled(
                         message=msg,
@@ -677,7 +655,7 @@ async def _invoke(
 
         ) as scope_error:
 
-            # always set this (child) side's exception as the
+            # always set this (callee) side's exception as the
             # local error on the context
             ctx._local_error: BaseException = scope_error
 
@@ -1046,8 +1024,9 @@ async def process_messages(
                                 trio.Event(),
                             )
 
-                    # runtime-scoped remote error (since no `.cid`)
+                    # XXX remote (runtime scoped) error or uknown
-                    case Error():
+                    # msg (type).
+                    case Error() | _:
                         # NOTE: this is the non-rpc error case,
                         # that is, an error **not** raised inside
                         # a call to ``_invoke()`` (i.e. no cid was
@@ -1055,6 +1034,10 @@ async def process_messages(
                         # this error to all local channel
                         # consumers (normally portals) by marking
                         # the channel as errored
+                        log.exception(
+                            f'Unhandled IPC msg:\n\n'
+                            f'{msg}\n'
+                        )
                         # assert chan.uid
                         chan._exc: Exception = unpack_error(
                             msg,
@@ -1062,17 +1045,6 @@ async def process_messages(
                         )
                         raise chan._exc
 
-                    # unknown/invalid msg type?
-                    case _:
-                        codec: MsgCodec = current_codec()
-                        message: str = (
-                            f'Unhandled IPC msg for codec?\n\n'
-                            f'|_{codec}\n\n'
-                            f'{msg}\n'
-                        )
-                        log.exception(message)
-                        raise RuntimeError(message)
-
                 log.runtime(
                     'Waiting on next IPC msg from\n'
                     f'peer: {chan.uid}\n'

tractor/_spawn.py

@@ -513,7 +513,7 @@ async def trio_proc(
         # })
 
         # track subactor in current nursery
-        curr_actor: Actor = current_actor()
+        curr_actor = current_actor()
         curr_actor._actoruid2nursery[subactor.uid] = actor_nursery
 
         # resume caller at next checkpoint now that child is up

tractor/_streaming.py

@@ -44,7 +44,6 @@ from .trionics import (
     BroadcastReceiver,
 )
 from tractor.msg import (
-    Return,
     Stop,
     Yield,
 )
@@ -83,7 +82,7 @@ class MsgStream(trio.abc.Channel):
         self,
         ctx: Context,  # typing: ignore # noqa
         rx_chan: trio.MemoryReceiveChannel,
-        _broadcaster: BroadcastReceiver|None = None,
+        _broadcaster: BroadcastReceiver | None = None,
 
     ) -> None:
         self._ctx = ctx
@@ -97,26 +96,36 @@ class MsgStream(trio.abc.Channel):
     # delegate directly to underlying mem channel
     def receive_nowait(
         self,
-        allow_msgs: list[str] = Yield,
+        allow_msg_keys: list[str] = ['yield'],
     ):
+        # msg: dict = self._rx_chan.receive_nowait()
         msg: Yield|Stop = self._rx_chan.receive_nowait()
-        # TODO: replace msg equiv of this or does the `.pld`
+        for (
-        # interface read already satisfy it? I think so, yes?
+            i,
-        try:
+            key,
-            return msg.pld
+        ) in enumerate(allow_msg_keys):
-        except AttributeError as attrerr:
+            try:
-            _raise_from_no_key_in_msg(
+                # return msg[key]
-                ctx=self._ctx,
+                return msg.pld
-                msg=msg,
+            # except KeyError as kerr:
-                src_err=attrerr,
+            except AttributeError as attrerr:
-                log=log,
+                if i < (len(allow_msg_keys) - 1):
-                stream=self,
+                    continue
-            )
+
+                _raise_from_no_key_in_msg(
+                    ctx=self._ctx,
+                    msg=msg,
+                    # src_err=kerr,
+                    src_err=attrerr,
+                    log=log,
+                    expect_key=key,
+                    stream=self,
+                )
 
     async def receive(
         self,
 
-        hide_tb: bool = False,
+        hide_tb: bool = True,
     ):
         '''
         Receive a single msg from the IPC transport, the next in
@@ -148,9 +157,10 @@ class MsgStream(trio.abc.Channel):
         try:
             try:
                 msg: Yield = await self._rx_chan.receive()
+                # return msg['yield']
                 return msg.pld
 
-            # TODO: implement with match: instead?
+            # except KeyError as kerr:
             except AttributeError as attrerr:
                 # src_err = kerr
                 src_err = attrerr
@@ -160,8 +170,10 @@ class MsgStream(trio.abc.Channel):
                 _raise_from_no_key_in_msg(
                     ctx=self._ctx,
                     msg=msg,
+                    # src_err=kerr,
                     src_err=attrerr,
                     log=log,
+                    expect_key='yield',
                     stream=self,
                 )
 
@@ -292,7 +304,7 @@ class MsgStream(trio.abc.Channel):
         while not drained:
             try:
                 maybe_final_msg = self.receive_nowait(
-                    allow_msgs=[Yield, Return],
+                    allow_msg_keys=['yield', 'return'],
                 )
                 if maybe_final_msg:
                     log.debug(

tractor/_supervise.py

@@ -119,11 +119,11 @@ class ActorNursery:
         name: str,
         *,
         bind_addrs: list[tuple[str, int]] = [_default_bind_addr],
-        rpc_module_paths: list[str]|None = None,
+        rpc_module_paths: list[str] | None = None,
-        enable_modules: list[str]|None = None,
+        enable_modules: list[str] | None = None,
-        loglevel: str|None = None,  # set log level per subactor
+        loglevel: str | None = None,  # set log level per subactor
-        nursery: trio.Nursery|None = None,
+        nursery: trio.Nursery | None = None,
-        debug_mode: bool|None = None,
+        debug_mode: bool | None = None,
         infect_asyncio: bool = False,
     ) -> Portal:
         '''

tractor/msg/_codec.py

@@ -420,7 +420,7 @@ def mk_codec(
 
 # instance of the default `msgspec.msgpack` codec settings, i.e.
 # no custom structs, hooks or other special types.
-_def_msgspec_codec: MsgCodec = mk_codec(ipc_pld_spec=Any)
+_def_msgspec_codec: MsgCodec = mk_codec(ipc_msg_spec=Any)
 
 # The built-in IPC `Msg` spec.
 # Our composing "shuttle" protocol which allows `tractor`-app code

tractor/msg/types.py

@@ -451,8 +451,7 @@ def from_dict_msg(
     dict_msg: dict,
 
     msgT: MsgType|None = None,
-    tag_field: str = 'msg_type',
+    tag_field: str = 'msg_type'
-    use_pretty: bool = False,
 
 ) -> MsgType:
     '''
@@ -469,19 +468,6 @@ def from_dict_msg(
     # XXX ensure tag field is removed
     msgT_name: str = dict_msg.pop(msg_type_tag_field)
     msgT: MsgType = _msg_table[msgT_name]
-    if use_pretty:
-        msgT = defstruct(
-            name=msgT_name,
-            fields=[
-                (key, fi.type)
-                for fi, key, _
-                in pretty_struct.iter_fields(msgT)
-            ],
-            bases=(
-                pretty_struct.Struct,
-                msgT,
-            ),
-        )
     return msgT(**dict_msg)
 
 # TODO: should be make a msg version of `ContextCancelled?`