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-rw-r--r--docs/library/index.rst23
1 files changed, 21 insertions, 2 deletions
diff --git a/docs/library/index.rst b/docs/library/index.rst
index 8a93b8c4d0..eb6a466255 100644
--- a/docs/library/index.rst
+++ b/docs/library/index.rst
@@ -4,6 +4,11 @@ Micro Python libraries
Python standard libraries
-------------------------
+The following standard Python libraries are built in to Micro Python.
+
+For additional libraries, please download them from the `micropython-lib repository
+<https://github.com/micropython/micropython-lib>`_.
+
.. toctree::
:maxdepth: 1
@@ -12,11 +17,23 @@ Python standard libraries
math.rst
os.rst
select.rst
+ struct.rst
sys.rst
time.rst
-Micro Python reduced libraries
-------------------------------
+Python micro-libraries
+----------------------
+
+The following standard Python libraries have been "micro-ified" to fit in with
+the philosophy of Micro Python. They provide the core functionality of that
+module and are intended to be a drop-in replacement for the standard Python
+library.
+
+The modules are available by their u-name, and also by their non-u-name. The
+non-u-name can be overridden by a file of that name in your package path.
+For example, ``import json`` will first search for a file ``json.py`` or
+directory ``json`` and load that package if it is found. If nothing is found,
+it will fallback to loading the built-in ``ujson`` module.
.. toctree::
:maxdepth: 1
@@ -28,6 +45,8 @@ Micro Python reduced libraries
Libraries specific to the pyboard
---------------------------------
+The following libraries are specific to the pyboard.
+
.. toctree::
:maxdepth: 2