shadiakiki1986

# list latest 10 event names and the next token

aws cloudtrail lookup-events \
      --max-items 10 \
      --lookup-attributes AttributeKey=EventSource,AttributeValue=ec2.amazonaws.com \
      --lookup-attributes AttributeKey=ReadOnly,AttributeValue=false \
      --starting-token "eyJOZXh0VG9rZW4iOiBudWxsLCAiYm90b190cnVuY2F0ZV9hbW91bnQiOiAxMH0=" | \
      jq '.Events[].EventName,.NextToken'
      
"ModifyInstanceAttribute"

shadiakiki1986

General

These are steps to restore an elasticsearch snapshot from one machine to another

Steps

Copy zip of snapshot from s3

sudo mkdir /data

shadiakiki1986

Generating a graphviz dot file equivalent to the mol file of pred(3) in chemlambda v2: pred_3.mol (original name was erroneous)

The lambda calculus expression for pred(3) (predecessor(3) == 2) is PRED := λn.λf.λx.n (λg.λh.h (g f)) (λu.x) (λu.u) (ref wikipedia)

Writing the above expression as nodes in a graph leads to the below graph. The corresponding dot file was written manually and available further below in this gist. An annotated version of pred_3.mol to help compare it to pred_3.dot is available further below in this gist.

To generate the dot file automatically from lambda terms, check http://www.teamshadi.net/chemlambda-js/ (a fork from this jsfiddle ). Its current output for pred(3) matches with the manually specified graph below.

Version 4 (2019-04-11): shifted indeces back by 1 (e.g. L1 to L0) t

shadiakiki1986

The below is an ackermann function implementation in awk based on the one on rosettacode.org and modified for higher verbosity to illustrate the details of calculations behind the ackermann function's recursion.

For example, the following shows Ackermann(2,2)

> awk -v m=2 -v n=2 -f ackermann_illustrated.awk

shadiakiki1986

shadiakiki1986

Deprecated in favor of https://github.com/shadiakiki1986/dbxcli-sync

shadiakiki1986

license: gpl-3.0
height: 600

shadiakiki1986

These are my notes while installing jupyterhub on an AWS EC2 instance running Ubuntu 16.04

Prerequisites

• install python3, pip3
  • sudo apt-get update && sudo apt-get install python3 python3-pip

• - ~~~`pip3 install pew`~~~
  

shadiakiki1986

# Fiddle at
# https://pyfiddle.io/fiddle/a14865cf-38c9-48d6-b90a-f5bedc7a5b6e/?m=Saved%20fiddle
#
# reshape a matrix M x N into M x P x (N-P) while creating overlapping rows
# Useful for LSTM input

import numpy as np
import pandas as pd

def stride_group(group, lahead):

shadiakiki1986

My first shot at fixing this was in tasks.py file below.

But then that just gave a "unhandled error in deferred", so I went on to use CrawlRunner.

That showed no output at all anymore, and didn't run as expected.

Eventually, I just settled on CELERY_WORKER_MAX_TASKS_PER_CHILD=1=1 in settings.py

Note: CELERY_WORKER_MAX_TASKS_PER_CHILD=1 is for django. Celery without django probably drops the CELERY_ prefix