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Python ThreadPoolExecutor (non-)graceful shutdown
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#!/usr/bin/env python3 | |
import concurrent.futures.thread | |
import sys | |
import time | |
from concurrent.futures import ThreadPoolExecutor, as_completed | |
def remove_file(path): | |
print('Removing file %s' % path) | |
time.sleep(10) # Pretending that I'm removing the file... | |
print('%s is removed' % path) | |
not_graceful = sys.argv[1:] and sys.argv[1] == '--not-graceful' | |
if not_graceful: | |
print('I will _not_ be shut down gracefully...') | |
else: | |
print('I will be shut down gracefully... (default behavior)') | |
with ThreadPoolExecutor(1) as executor: | |
futures = [executor.submit(remove_file, path) for path in 'abcd'] | |
try: | |
for future in as_completed(futures): | |
future.result() | |
except KeyboardInterrupt: | |
if not_graceful: | |
executor._threads.clear() | |
concurrent.futures.thread._threads_queues.clear() | |
raise |
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