Chris Smith smitty1eGH

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

brew install jq

A "Best of the Best Practices" (BOBP) guide to developing in Python.

	# Count total EBS based storage in AWS
	aws ec2 describe-volumes \| jq "[.Volumes[].Size] \| add"
	# Count total EBS storage with a tag filter
	aws ec2 describe-volumes --filters "Name=tag:Name,Values=CloudEndure Volume qjenc" \| jq "[.Volumes[].Size] \| add"
	# Describe instances concisely
	aws ec2 describe-instances \| jq '[.Reservations \| .[] \| .Instances \| .[] \| {InstanceId: .InstanceId, State: .State, SubnetId: .SubnetId, VpcId: .VpcId, Name: (.Tags[]\|select(.Key=="Name")\|.Value)}]'
	# Wait until $instance_id is running and then immediately stop it again
	aws ec2 wait instance-running --instance-id $instance_id && aws ec2 stop-instances --instance-id $instance_id

	# Get 10th instance in the account

	#!/bin/env python
	"""
	A simple example of using Python sockets for a client HTTPS connection.
	"""

	import ssl
	import socket

	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.connect(('github.com', 443))

	(defun aj-toggle-fold ()
	"Toggle fold all lines larger than indentation on current line"
	(interactive)
	(let ((col 1))
	(save-excursion
	(back-to-indentation)
	(setq col (+ 1 (current-column)))
	(set-selective-display
	(if selective-display nil (or col 1))))))
	(global-set-key [(M C i)] 'aj-toggle-fold)