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Fix process pool fallback on Python 3.10 #2631

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merged 3 commits into from Nov 20, 2021
Merged

Fix process pool fallback on Python 3.10 #2631

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095b003
Fix process pool fallback on Python 3.10
MatthewScholefield Nov 20, 2021
4e5fb56
Update CHANGES.md
MatthewScholefield Nov 20, 2021
0bfc53e
Update CHANGES.md
MatthewScholefield Nov 20, 2021
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6 changes: 6 additions & 0 deletions CHANGES.md
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@@ -1,5 +1,11 @@
# Change Log

## Unreleased

### _Black_

- Fixed Python 3.10 support on platforms without ProcessPoolExecutor (#2631)

## 21.11b1

### _Black_
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2 changes: 1 addition & 1 deletion src/black/__init__.py
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Expand Up @@ -687,7 +687,7 @@ def reformat_many(
worker_count = min(worker_count, 60)
try:
executor = ProcessPoolExecutor(max_workers=worker_count)
except (ImportError, OSError):
except (ImportError, NotImplementedError, OSError):
# we arrive here if the underlying system does not support multi-processing
# like in AWS Lambda or Termux, in which case we gracefully fallback to
# a ThreadPoolExecutor with just a single worker (more workers would not do us
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