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tractor/examples/debugging/multi_subactors.py

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import tractor
import trio
async def breakpoint_forever():
"Indefinitely re-enter debugger in child actor."
while True:
await trio.sleep(0.1)
await tractor.breakpoint()
async def name_error():
"Raise a ``NameError``"
getattr(doggypants)
async def spawn_error():
""""A nested nursery that triggers another ``NameError``.
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor(
name_error,
name='name_error_1',
)
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return await portal.result()
async def main():
"""The main ``tractor`` routine.
The process tree should look as approximately as follows:
-python examples/debugging/multi_subactors.py
|-python -m tractor._child --uid ('name_error', 'a7caf490 ...)
|-python -m tractor._child --uid ('bp_forever', '1f787a7e ...)
`-python -m tractor._child --uid ('spawn_error', '52ee14a5 ...)
`-python -m tractor._child --uid ('name_error', '3391222c ...)
"""
async with tractor.open_nursery() as n:
# Spawn both actors, don't bother with collecting results
# (would result in a different debugger outcome due to parent's
# cancellation).
await n.run_in_actor(breakpoint_forever)
await n.run_in_actor(name_error)
await n.run_in_actor(spawn_error)
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if __name__ == '__main__':
tractor.run(main, debug_mode=True)