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Separate Lock Instantiation from `with` Call


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LowMerge Without ReviewNo

This codemod separates creating a threading lock instance from calling it as a context manager. Calling with threading.Lock() does not have the effect you would expect. The lock is not acquired. Instead, to correctly acquire a lock, create the instance separately, before calling it as a context manager.

The change will apply to any of these threading classes: Lock, RLock, Condition, Semaphore, and BoundedSemaphore.

The change looks like this:

  import threading
- with threading.Lock():
+ lock = threading.Lock()
+ with lock:

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Why is this codemod marked as Merge Without Review?

We believe this replacement is safe and should not result in any issues.

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