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.. _micropython_lib:
MicroPython libraries
=====================
.. warning::
Important summary of this section
* MicroPython implements a subset of Python functionality for each module.
* To ease extensibility, MicroPython versions of standard Python modules
usually have ``u`` ("micro") prefix.
* Any particular MicroPython variant or port may miss any feature/function
described in this general documentation (due to resource constraints or
other limitations).
This chapter describes modules (function and class libraries) which are built
into MicroPython. There are a few categories of such modules:
* Modules which implement a subset of standard Python functionality and are not
intended to be extended by the user.
* Modules which implement a subset of Python functionality, with a provision
for extension by the user (via Python code).
* Modules which implement MicroPython extensions to the Python standard libraries.
* Modules specific to a particular `MicroPython port` and thus not portable.
Note about the availability of the modules and their contents: This documentation
in general aspires to describe all modules and functions/classes which are
implemented in MicroPython project. However, MicroPython is highly configurable, and
each port to a particular board/embedded system makes available only a subset
of MicroPython libraries. For officially supported ports, there is an effort
to either filter out non-applicable items, or mark individual descriptions
with "Availability:" clauses describing which ports provide a given feature.
With that in mind, please still be warned that some functions/classes
in a module (or even the entire module) described in this documentation **may be
unavailable** in a particular build of MicroPython on a particular system. The
best place to find general information of the availability/non-availability
of a particular feature is the "General Information" section which contains
information pertaining to a specific `MicroPython port`.
Beyond the built-in libraries described in this documentation, many more
modules from the Python standard library, as well as further MicroPython
extensions to it, can be found in `micropython-lib`.
Python standard libraries and micro-libraries
---------------------------------------------
The following standard Python libraries have been "micro-ified" to fit in with
the philosophy of MicroPython. They provide the core functionality of that
module and are intended to be a drop-in replacement for the standard Python
library. Some modules below use a standard Python name, but prefixed with "u",
e.g. ``ujson`` instead of ``json``. This is to signify that such a module is
micro-library, i.e. implements only a subset of CPython module functionality.
By naming them differently, a user has a choice to write a Python-level module
to extend functionality for better compatibility with CPython (indeed, this is
what done by the `micropython-lib` project mentioned above).
On some embedded platforms, where it may be cumbersome to add Python-level
wrapper modules to achieve naming compatibility with CPython, micro-modules
are available both 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 library path (``sys.path``).
For example, ``import json`` will first search for a file ``json.py`` (or package
directory ``json``) and load that module if it is found. If nothing is found,
it will fallback to loading the built-in ``ujson`` module.
.. toctree::
:maxdepth: 1
builtins.rst
array.rst
cmath.rst
gc.rst
math.rst
sys.rst
ubinascii.rst
ucollections.rst
uerrno.rst
uhashlib.rst
uheapq.rst
uio.rst
ujson.rst
uos.rst
ure.rst
uselect.rst
usocket.rst
ussl.rst
ustruct.rst
utime.rst
uzlib.rst
_thread.rst
MicroPython-specific libraries
------------------------------
Functionality specific to the MicroPython implementation is available in
the following libraries.
.. toctree::
:maxdepth: 1
btree.rst
framebuf.rst
machine.rst
micropython.rst
network.rst
ucryptolib.rst
uctypes.rst
Libraries specific to the pyboard
---------------------------------
The following libraries are specific to the pyboard.
.. toctree::
:maxdepth: 2
pyb.rst
lcd160cr.rst
Libraries specific to the WiPy
------------------------------
The following libraries are specific to the WiPy.
.. toctree::
:maxdepth: 2
wipy.rst
Libraries specific to the ESP8266
---------------------------------
The following libraries are specific to the ESP8266.
.. toctree::
:maxdepth: 2
esp.rst
|
