making python loggers output all messages to stdout in addition to log file

Okay, let's dive into setting up Python loggers to output messages to both stdout (standard output) and a log file. This is a common requirement for applications that need persistent logging and real-time monitoring. I'll provide a comprehensive guide with explanations and code examples.

**Understanding the Basics of Python Logging**

Before we start configuring our loggers, it's important to grasp the fundamental concepts:

* **Loggers:** The primary interface for your application to write log messages. You usually have one logger per module or component. Think of it as the entry point for your logging activity.

* **Handlers:** Determine *where* the log messages go. Examples include:
* `StreamHandler`: Sends log messages to streams like `stdout` or `stderr`.
* `FileHandler`: Writes log messages to a file.
* `RotatingFileHandler`: Rotates log files based on size or time.
* `SMTPHandler`: Sends log messages via email.

* **Formatters:** Control the *layout* of the log messages. You define the format (e.g., timestamp, log level, message) using placeholders.

* **Log Levels:** Indicate the severity of a log message. Standard levels include:
* `DEBUG`: Detailed information, typically useful only for developers.
* `INFO`: Confirmation that things are working as expected.
* `WARNING`: An indication that something unexpected happened, or indicative of some problem in the near future (e.g. 'disk space low'). The software is still working as expected.
* `ERROR`: More serious problem, the software has not been able to perform some function.
* `CRITICAL`: A very serious problem, indicating that the program itself may be unable to continue running.

**The Goal: Logging to Stdout and a File**

We want our Python logger to:

1. Write log messages to the console (stdout).
2. Simultaneously write the same messages to a log file.
3. Be able to configure the log level and format for both destinations indepe ...

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