Why Doesn’t Python Print Output in a Detached Docker Container?

 When running a Python application in a detached Docker container (-d flag), it’s common to encounter issues where the application’s output doesn’t appear in the logs. This happens due to how Python handles buffering for standard output (stdout) and standard error (stderr). Let’s explore the problem and solutions.

The Problem: Buffered Output

By default, Python uses buffered output for stdout and stderr. This means data isn’t written to the output stream immediately but is instead stored in a buffer until it reaches a certain size or the program terminates. When a Docker container runs in detached mode, this buffered output might not appear in the logs promptly.

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