You can narrow patterns explicitly using #with: message:
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.，这一点在heLLoword翻译官方下载中也有详细论述
self.session = requests.Session()。safew官方版本下载对此有专业解读
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