chumicro-compat 0.1.0

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chumicro-compat

Cross-runtime compatibility polyfills for CPython, MicroPython, and CircuitPython.

Provides lightweight reimplementations of CPython standard-library features that are missing or incomplete on microcontroller runtimes. On CPython, re-exports the real C implementations for zero overhead.

Installation

# CPython (pip)
pip install chumicro-compat

# CircuitPython (circup)
circup bundle-add ChuMicro/chumicro-bundle
circup install chumicro-compat

# MicroPython (mip)
mpremote mip install github:ChuMicro/chumicro-bundle/chumicro_compat

For experimental (pre-release) versions from the develop branch:

pip install chumicro-compat-experimental
circup install chumicro-compat-experimental
mpremote mip install github:ChuMicro/chumicro-bundle/chumicro_compat_experimental

Quick example

from chumicro_compat.functools import partial


def set_led(pin, brightness):
    print(f"pin {pin} → {brightness}%")


# Freeze the pin, vary the brightness later.
set_status_led = partial(set_led, 13)
set_status_led(50)   # pin 13 → 50%
set_status_led(100)  # pin 13 → 100%

What's included

functools

Symbol	Description
partial(func, *args, **keywords)	Freeze positional and keyword arguments to a callable
partial.func	The original wrapped callable
partial.args	Frozen positional arguments (tuple)
partial.keywords	Frozen keyword arguments (dict)

Platform support

Runtime	Implementation
CPython	Re-exports the C-implemented functools.partial directly
MicroPython	Pure-Python polyfill with __slots__
CircuitPython	Pure-Python polyfill with __slots__

The public API (.func, .args, .keywords, __call__, __repr__) is identical across all runtimes.

Docs

• User guide — what's polyfilled and why, usage patterns
• API reference — full API documentation

Examples

Example	What it shows
partial_basic.py	Freeze one argument to a function
partial_keyword_override.py	Freeze keyword args, override at call time
partial_callback.py	Wire a callback with frozen context (embedded pattern)