Adam Golinski talesa

Array

Now available here: https://github.com/y0ast/pytorch-snippets/tree/main/fast_mnist

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

	import inspect
	import ast

	def _args_from_usage_string_ast(s):
	tree = ast.parse(s)
	ast_args = tree.body[0].value.args
	args = [s[arg.col_offset:arg.end_col_offset] for arg in ast_args]
	return args

	"""Sampling parameters of a lorenz attractor.

	The forward pass integrates the lorenz attractor ODE system using
	tt.scan with a Runge-Kutta integrator. The predicted high-resolution
	timecourse is interpolated down so it can be compared to low-density
	observations.
	"""
	import abc
	import numpy
	import pymc3

	# Example Huffman coding implementation
	# Distributions are represented as dictionaries of { 'symbol': probability }
	# Codes are dictionaries too: { 'symbol': 'codeword' }

	def huffman(p):
	'''Return a Huffman code for an ensemble with distribution p.'''
	assert(sum(p.values()) == 1.0) # Ensure probabilities sum to 1

	# Base case of only two symbols, assign 0 or 1 arbitrarily
	if(len(p) == 2):

	# 0 is too far from ` ;)
	set -g base-index 1

	# Automatically set window title
	set-window-option -g automatic-rename on
	set-option -g set-titles on

	#set -g default-terminal screen-256color
	set -g status-keys vi
	set -g history-limit 10000