[docs]Add a note on configure logging
Usage Notes
=====================
-Logging
+Configure logging
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By default, `toppra` does not configure any of the `toppra...`
-loggers. Thus no log messages will be printed by default.
+loggers. Thus no log messages will be printed by default. A simple
+logger that only print to the console can be setup easily.
+.. code-block:: python
+ :linenos:
+ import toppra as ta
+ ta.setup_logging("INFO")
How many grid-points should be used?
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