logger doc

docs/source/main_classes/logging.mdx

@@ -33,14 +33,37 @@ TRANSFORMERS_VERBOSITY=error ./myprogram.py
 ```
 
 Additionally, some `warnings` can be disabled by setting the environment variable
-`TRANSFORMERS_NO_ADVISORY_WARNINGS` to a true value, like *1*. This will disable any warning that is logged using
+`TRANSFORMERS_NO_ADVISORY_WARNINGS` to a true value, like _1_. This will disable any warning that is logged using
 [`logger.warning_advice`]. For example:
 
-
 ```bash
 TRANSFORMERS_NO_ADVISORY_WARNINGS=1 ./myprogram.py
 ```
 
+It follows an usage example:
+
+```python
+from transformers.utils import logging
+
+logging.set_verbosity_info()
+logger = logging.get_logger(__name__)
+logger.info("INFO")
+logger.warning("WARN")
+```
+
+Above, a `logger` instance is created from `logging.get_logger(__name__)`. If you want to use `logging` in a script, you shouldn't pass `__name__` to `logging.get_logger`. For example:
+
+```python
+from transformers.utils import logging
+
+if __name__ == "__main__":
+  logging.set_verbosity_info()
+  # leave it empy or use a string
+  logger = logging.get_logger()
+  logger.info("INFO")
+  logger.warning("WARN")
+```
+
 All the methods of this logging module are documented below, the main ones are
 [`logging.get_verbosity`] to get the current level of verbosity in the logger and
 [`logging.set_verbosity`] to set the verbosity to the level of your choice. In order (from the least
@@ -54,7 +77,7 @@ verbose to the most verbose), those levels (with their corresponding int values
 - `transformers.logging.INFO` (int value, 20): reports error, warnings and basic information.
 - `transformers.logging.DEBUG` (int value, 10): report all information.
 
-By default, `tqdm` progress bars will be displayed during model download. [`logging.disable_progress_bar`] and [`logging.enable_progress_bar`] can be used to suppress or unsuppress this behavior. 
+By default, `tqdm` progress bars will be displayed during model download. [`logging.disable_progress_bar`] and [`logging.enable_progress_bar`] can be used to suppress or unsuppress this behavior.
 
 ## Base setters