Datasheet

One unique feature of Python is that the indentation of code matters. Usually the recommendation is to indent code

with four spaces for every indent. In general, we recommend that too. However, one trick to storing more human-

readable code is to use a single tab character for indentation. This approach uses 1/4 of the space for indentation and

can be significant when we're counting bytes.

Mac OSX loves to add extra files.

Luckily you can disable some of the extra hidden files that Mac OSX adds by running a few commands to disable

search indexing and create zero byte placeholders. Follow the steps below to maximize the amount of space available

on OSX:

Prevent & Remove Mac OSX Hidden Files

First find the volume name for your board. With the board plugged in run this command in a terminal to list all the

volumes:

Look for a volume with a name like CIRCUITPY (the default for CircuitPython). The full path to the volume is

the /Volumes/CIRCUITPY path.

Now follow the steps from this question (https://adafru.it/u1c) to run these terminal commands that stop hidden files

from being created on the board:

Replace /Volumes/CIRCUITPY in the commands above with the full path to your board's volume if it's different. At this

point all the hidden files should be cleared from the board and some hidden files will be prevented from being created.

However there are still some cases where hidden files will be created by Mac OSX. In particular if you copy a file that

was downloaded from the internet it will have special metadata that Mac OSX stores as a hidden file. Luckily you can

run a copy command from the terminal to copy files without this hidden metadata file. See the steps below.

Copy Files on Mac OSX Without Creating Hidden Files

ls -l /Volumes

mdutil -i off /Volumes/CIRCUITPY

cd /Volumes/CIRCUITPY

rm -rf .{,_.}{fseventsd,Spotlight-V*,Trashes}

mkdir .fseventsd

touch .fseventsd/no_log .metadata_never_index .Trashes

cd -

https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-

circuitpython

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