micropython-lib
micropython-lib is a project to develop a non-monolothic standard library for "advanced" MicroPython fork (https://github.com/pfalcon/micropython). Each module or package is available as a separate distribution package from PyPI. Each module comes from one of the following sources (and thus each module has its own licensing terms):
- written from scratch specifically for MicroPython
- ported from CPython
- ported from some other Python implementation, e.g. PyPy
- some modules actually aren't implemented yet and are dummy
Note that the main target of micropython-lib is a "Unix" port of the aforementioned fork of MicroPython. Actual system requirements vary per module. Majority of modules are compatible with the upstream MicroPython, though some may require additional functionality/optimizations present in the "advanced" fork. Modules not related to I/O may also work without problems on bare-metal ports, not just on "Unix" port (e.g. pyboard).
Usage
micropython-lib packages are published on PyPI (Python Package Index), the standard Python community package repository: http://pypi.python.org/ . On PyPI, you can search for MicroPython related packages and read additional package information. By convention, all micropython-lib package names are prefixed with "micropython-" (the reverse is not true - some package starting with "micropython-" aren't part of micropython-lib and were released by 3rd parties).
Browse available packages via this URL. (Note: this may also include 3rd-party modules which are not part of micropython-lib.)
To install packages from PyPI for usage on your local system, use the
upip
tool, which is MicroPython's native package manager, similar to
pip
, which is used to install packages for CPython. upip
is bundled
with MicroPython "Unix" port (i.e. if you build "Unix" port, you
automatically have upip
tool). Following examples assume that
micropython
binary is available on your PATH
:
$ micropython -m upip install micropython-pystone
...
$ micropython
>>> import pystone
>>> pystone.main()
Pystone(1.2) time for 50000 passes = 0.534
This machine benchmarks at 93633 pystones/second
Run micropython -m upip --help
for more information about upip
.
CPython backports
While micropython-lib focuses on MicroPython, sometimes it may be beneficial
to run MicroPython code using CPython, e.g. to use code coverage, debugging,
etc. tools available for it. To facilitate such usage, micropython-lib also
provides reimplementations ("backports") of MicroPython modules which run on
CPython. This first of all applies to the builtin MicroPython "u" modules,
but as time goes on, backports of micropython-lib's own modules can be
provided. Backport modules are in the directories named cpython-*
of
this repository. On PyPI, these named
micropython-cpytion-*.
These modules should be installed with CPython's pip3 tool. Example session:
$ pip3 install --user micropython-cpython-uhashlib
...
$ python3
...
>>> import uhashlib
>>> uhashlib.sha1(b"test").hexdigest()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'sha1' object has no attribute 'hexdigest'
# MicroPython's uhashlib doesn't have hexdigest(), use ubinascii.hexlify(.digest())
>>> uhashlib.sha1(b"test").digest()
b'\xa9J\x8f\xe5\xcc\xb1\x9b\xa6\x1cL\x08s\xd3\x91\xe9\x87\x98/\xbb\xd3'
Development
To install modules during development, use make install
. By default, all
available packages will be installed. To install a specific module, add the
MOD=<module>
parameter to the end of the make install
command.
Contributing
micropython-lib is a community project and can be implemented "fully" only by contributions from interested parties. The contributions are expected to adhere to Contribution Guidelines.
Links
If you would like to trace evolution of MicroPython packaging support, you may find following links useful (note that they may contain outdated information):
Guidelines for packaging MicroPython modules for PyPI:
Credits
micropython-lib is developed and maintained by Paul Sokolovsky with the help of MicroPython community.