Standard Libraries

Python standard libraries

The libraries below implement a subset of the corresponding standard Python (CPython) library. They are implemented in C, not Python.

CircuitPython’s long-term goal is that code written in CircuitPython using Python standard libraries will be runnable on CPython without changes.

These libraries are not enabled on CircuitPython builds with limited flash memory: binascii, errno, json, re.

These libraries are not currently enabled in any CircuitPython build, but may be in the future: platform

• builtins – builtin functions and exceptions
• heapq – heap queue algorithm
• array – arrays of numeric data
• binascii – binary/ASCII conversions
• collections – collection and container types
• errno – system error codes
• gc – control the garbage collector
• io – input/output streams
• json – JSON encoding and decoding
• platform – access to underlying platform’s identifying data
• re – simple regular expressions
• sys – system specific functions
• select – wait for events on a set of streams

Omitted string functions

A few string operations are not enabled on small builds due to limited flash memory: string.center(), string.partition(), string.splitlines(), string.reversed().

CircuitPython/MicroPython-specific libraries

Functionality specific to the CircuitPython/MicroPython implementations is available in the following libraries.

• micropython – MicroPython extensions and internals