Using the REPL

Display built-in modules / libraries

Adafruit CircuitPython 6.2.0-beta.2 on 2021-02-11; Adafruit Trinket M0 with samd21e18
>>> help("modules")
__main__          digitalio         pulseio           supervisor
analogio          gc                pwmio             sys
array             math              random            time
board             microcontroller   rotaryio          touchio
builtins          micropython       rtc               usb_hid
busio             neopixel_write    storage           usb_midi
collections       os                struct
Plus any modules on the filesystem

Use REPL fast with copy-paste multi-one-liners

(yes, semicolons are legal in Python)

# load most common libraries
import time; import board; from digitalio import DigitalInOut,Pull; import analogio; import touchio

# print out board pins and objects (like 'I2C' and 'display')
import board; dir(board)

# print out microcontroller pins (chip pins, not the same as board pins)
import microcontroller; dir(

# release configured / built-in display
import displayio; displayio.release_displays()

# turn off auto-reload when CIRCUITPY drive is touched
import supervisor; supervisor.disable_autoreload()

# make all neopixels purple
import board; import neopixel; leds = neopixel.NeoPixel(board.D3, 8, brightness=0.2); leds.fill(0xff00ff)

This guide was first published on Apr 02, 2022. It was last updated on Apr 02, 2022.

This page (Hacks) was last updated on Mar 31, 2022.

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