MicroPython & Pyboard

MicroPython is a lean implementation of Python 3 that includes a small subset of the Python standard library and is optimized to run on microcontrollers

Adafruit.com What is MicroPython?   Page   Video Python for microcontrollers
Adafruit.com What is CircuitPython Circuit Python adds hardware support (microcontrollers) to Python
Nicholas H. Tollervey MU CircuitPython Editor Downloads your code.py app to the board. Built-in serial monitor for REPL
Adafruit.com Circuit Python on Raspberry Pi  
Adafruit.com CircuitPython for Microcontrollers CircuitPython is Adafruit's open source derivative of MicroPython
CircuitPython.org CircuitPython.org Getting started with CircuitPython, code.py, dynamic code/file changes
Dave Astels CircuitPython: Python on Hardware Video
Adafruit Learning CircuitPython Essentials Each section will present you with a piece of code designed to work with different boards
Adafruit.com Circuit Python Essentials (Code) Adafruit Learning System Guides (py code)
Adafruit.com CircuitPython Core Modules Core modules (libraries) like time, math, touchio, PWMOut, etc.
chiark.greenend.org.uk Putty Download Using Putty instead of MU's serial console to your CircuitPython board
Adafruit.com CircuitPython Tutorials CircuitPython & Circuit Playground Express tutorials: 16 videos