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desantis / blocktoimg.py
Created September 16, 2018 09:18 — forked from laanwj/blocktoimg.py
tools to write (block) data to png files and vice versa
#!/usr/bin/env python3
# Distributed under the MIT software license
import binascii, struct, sys, io, argparse
from PIL import Image
IMG_WIDTH = 512 # could be made adaptive...
MIN_HEIGHT = 4 # minimum height of image; twitter won't let us upload anything smaller
BYTES_PER_PIXEL = 4 # RGBA, 8 bit
def div_roundup(x,y):
@laanwj
laanwj / gitian.md
Last active September 23, 2020 15:35
gitian buildling on debian 9.5

Some changes are needed to build on debian because of the switch of the guest OS to bionic.

lxc that comes with debian is not high enough version to support bionic (the minimum is 2.1.1), so need to build from scratch.

debootstrap that comes with debian will give the following error:

    $ bin/make-base-vm --lxc --suite bionic --arch amd64                                                                                              
 E: No such script: /usr/share/debootstrap/scripts/bionic
@0xjac
0xjac / private_fork.md
Last active December 22, 2024 15:47
Create a private fork of a public repository

The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

  1. Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)

git clone --bare git@github.com:usi-systems/easytrace.git

import asyncio
END = b'Bye-bye!\n'
@asyncio.coroutine
def echo_client():
reader, writer = yield from asyncio.open_connection('localhost', 8000)
writer.write(b'Hello, world\n')
writer.write(b'What a fine day it is.\n')
writer.write(END)