Hide `_invoke()` tb, move actor error to exceptions mod

tractor/_actor.py

@@ -41,10 +41,6 @@ from . import _mp_fixup_main
 log = get_logger('tractor')
 
 
-class ActorFailure(Exception):
-    "General actor failure"
-
-
 async def _invoke(
 
     actor: 'Actor',
@@ -56,8 +52,10 @@ async def _invoke(
         Union[trio.CancelScope, BaseException]
     ] = trio.TASK_STATUS_IGNORED,
 ):
-    """Invoke local func and deliver result(s) over provided channel.
+    '''Invoke local func and deliver result(s) over provided channel.
-    """
+
+    '''
+    __tracebackhide__ = True
     treat_as_gen = False
 
     # possible a traceback (not sure what typing is for this..)

tractor/_exceptions.py

@@ -12,6 +12,10 @@ import trio
 _this_mod = importlib.import_module(__name__)
 
 
+class ActorFailure(Exception):
+    "General actor failure"
+
+
 class RemoteActorError(Exception):
     # TODO: local recontruction of remote exception deats
     "Remote actor exception bundled locally"
@@ -40,6 +44,7 @@ class InternalActorError(RemoteActorError):
 class TransportClosed(trio.ClosedResourceError):
     "Underlying channel transport was closed prior to use"
 
+
 class ContextCancelled(RemoteActorError):
     "Inter-actor task context cancelled itself on the callee side."
 
@@ -58,7 +63,7 @@ class NoRuntime(RuntimeError):
 
 def pack_error(
     exc: BaseException,
-    tb = None,
+    tb=None,
 
 ) -> Dict[str, Any]:
     """Create an "error message" for tranmission over

tractor/_spawn.py

@@ -29,8 +29,9 @@ from ._state import (
 
 from .log import get_logger
 from ._portal import Portal
-from ._actor import Actor, ActorFailure
+from ._actor import Actor
 from ._entry import _mp_main
+from ._exceptions import ActorFailure
 
 
 log = get_logger('tractor')