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#!/usr/bin/env python
"""
Example of an Eliot action context spanning multiple threads.
"""
from threading import Thread
from sys import stdout
from eliot import to_file, preserve_context, start_action
to_file(stdout)
def add_in_thread(x, y):
with start_action(action_type="in_thread", x=x, y=y) as context:
context.add_success_fields(result=x+y)
with start_action(action_type="main_thread"):
# Preserve Eliot context and restore in new thread:
thread = Thread(target=preserve_context(add_in_thread),
kwargs={"x": 3, "y": 4})
thread.start()
# Wait for the thread to exit:
thread.join()
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