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tractor/examples/debugging/multi_daemon_subactors.py

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import tractor
import trio
async def breakpoint_forever():
"Indefinitely re-enter debugger in child actor."
try:
while True:
yield 'yo'
await tractor.breakpoint()
except BaseException:
tractor.log.get_console_log().exception(
'Cancelled while trying to enter pause point!'
)
raise
async def name_error():
"Raise a ``NameError``"
2021-02-24 18:39:14 +00:00
getattr(doggypants) # noqa
async def main():
"""Test breakpoint in a streaming actor.
"""
async with tractor.open_nursery(
debug_mode=True,
# loglevel='cancel',
# loglevel='devx',
) as n:
p0 = await n.start_actor('bp_forever', enable_modules=[__name__])
p1 = await n.start_actor('name_error', enable_modules=[__name__])
# retreive results
async with p0.open_stream_from(breakpoint_forever) as stream:
# triggers the first name error
try:
await p1.run(name_error)
except tractor.RemoteActorError as rae:
assert rae.boxed_type is NameError
async for i in stream:
# a second time try the failing subactor and this tie
# let error propagate up to the parent/nursery.
await p1.run(name_error)
if __name__ == '__main__':
trio.run(main)