New submission from Łukasz Langa <luk...@langa.pl>:
bpo-27144 introduced a regression for `as_completed()`: it used to accept
arbitrary iterables but now requires sequences, otherwise raising an exception
like:
Traceback (most recent call last):
File "sandcastle/worker/sandcastle_worker.py", line 1266, in get_work_item
File "jupiter/jupiter_client.py", line 166, in acquireWork
File "jupiter/jupiter_client.py", line 241, in _acquire_multiple_async
File "jupiter/jupiter_client.py", line 336, in _wait_for_responses
File
"/usr/local/fbcode/gcc-5-glibc-2.23/lib/python3.6/concurrent/futures/_base.py",
line 217, in as_completed
total_futures = len(fs)
TypeError: object of type 'map' has no len()
Since `as_completed()` is a very popular function, we need to revert the
behavior here.
----------
assignee: lukasz.langa
keywords: 3.6regression
messages: 303355
nosy: grzgrzgrz3, lukasz.langa, ned.deily, pitrou
priority: release blocker
severity: normal
stage: patch review
status: open
title: concurrent.futures.as_completed() no longer accepts arbitrary iterables
type: behavior
versions: Python 3.6, Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue31641>
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