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		<title>Bash on 春江暮客</title>
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				<title>Python 后台日志延迟输出：用 -u、flush 和 Bash pipefail 排查</title>
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				<description>复现 Python 管道输出缓冲，用 -u 或 flush=True 及时显示进度，并用 Bash pipefail 保留任务失败状态。</description>
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