Logan Yang logancyang

Step 1: Server Credentials

This assumes you are now connected to the server via SSH.

sudo -s Enter root mode for admin access
groupadd devgroup Create new group to be later granted access to /var/www/html

Creating a new Root User

useradd -G root,devgroup masterdev Create new root user. Also add to the devgroup
passwd masterdev Change password for the new root user
At this point, you'll need to input your new root user's new password

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

	class Leaf {
	constructor() {
	this.pos = createVector(random(width), random(height));
	this.reached = false;
	}

	show() {
	fill(255, 255, 0);
	noStroke();
	ellipse(this.pos.x, this.pos.y, 8, 8);

	class Tensor:
	...
	def backward(self):
	# topological order all of the parents in the graph
	topo = []
	visited = set()
	def build_topo(v):
	if v not in visited:
	visited.add(v)
	for parent in v._prev:

	class Tensor:
	def __init__(self, data, _parents=(), _op=''):
	self.data = data
	self.grad = 0
	self._backward = lambda: None
	# A set that contains previous (parent) nodes that produced
	# the current node with operation _op
	self._prev = set(_parents)
	self._op = _op

	class Tensor:
	def __init__(self, data, _parents, _op):
	...
	def sigmoid(self):
	sigm = 1.0/(1 + np.exp(-self.data))
	out = Tensor(sigm, _parents=(self,), _op="σ")
	def _backward():
	self.grad = sigm * (1 - sigm)
	out._backward = _backward
	return out