MicroPython libraries

Python standard libraries and micro-libraries

The libraries below are inherited from MicroPython. They are similar to the standard Python libraries with the same name. They implement a subset of or a variant of the corresponding standard Python library.

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, usually on non-Express builds: binascii, errno, json, re.

These libraries are not currently enabled in any CircuitPython build, but may be in the future: ctypes, hashlib, zlib.

• 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
• hashlib – hashing algorithms
• io – input/output streams
• json – JSON encoding and decoding
• re – simple regular expressions
• sys – system specific functions
• uasyncio — asynchronous I/O scheduler
• uctypes – access binary data in a structured way
• select – wait for events on a set of streams
• zlib – zlib decompression

Omitted functions in the string library

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

CircuitPython/MicroPython-specific libraries

Functionality specific to the CircuitPython/MicroPython implementation is available in the following libraries. These libraries may change significantly or be removed in future versions of CircuitPython.

• btree – simple BTree database
• framebuf — frame buffer manipulation
• micropython – access and control MicroPython internals