How to use the aiorun._DO_NOT_CANCEL_COROS function in aiorun
To help you get started, we’ve selected a few aiorun examples, based on popular ways it is used in public projects.
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cjrh / aiorun / tests / test_posix.py View on Github 
def direct_cancel():
"""Reach inside, find the one task that is marked "do not cancel"
for shutdown, and then cancel it directly. This should raise
CancelledError at the location of the caller for
`shutdown_waits_for()`."""
tasks = all_tasks()
for t in tasks: # pragma: no cover
if t._coro in _DO_NOT_CANCEL_COROS:
t.cancel()
return
