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bpo-31641: Allow arbitrary iterables in concurrent.futures.as_completed() (#3830)

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This was possible before.  GH-1560 introduced a regression after 3.6.2 got
released where only sequences were accepted now.  This commit addresses this
problem.
This commit is contained in:
Łukasz Langa 2017-09-29 14:33:34 -07:00 • committed by GitHub
parent 01c6a8859e
commit 574562c5dd
2 changed files with 6 additions and 3 deletions
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6
Lib/test/test_concurrent_futures.py
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@ -7,6 +7,7 @@ test.support.import_module('multiprocessing.synchronize')
from test.support.script_helper import assert_python_ok
import itertools
import os
import sys
import threading
@ -395,8 +396,11 @@ class AsCompletedTests:
def test_duplicate_futures(self):
# Issue 20367. Duplicate futures should not raise exceptions or give
# duplicate responses.
# Issue #31641: accept arbitrary iterables.
future1 = self.executor.submit(time.sleep, 2)
completed = [f for f in futures.as_completed([future1,future1])]
completed = [
f for f in futures.as_completed(itertools.repeat(future1, 3))
]
self.assertEqual(len(completed), 1)
def test_free_reference_yielded_future(self):