Using Deep Neural Networks for NLP Applications – MAS

Really enjoyed visiting the Monetary Authority of Singapore (MAS) and talking on the applications of Deep Neural Networks for Natural Language Processing (NLP).

IMG_0993

During the talk, there were some great questions from the audience, one of them was “can a character level  model capture the unique structure of words and sentences? ” The answer is YES, and I hope that the demo, showing a three-layers 512-units LSTM model trained on publicly-available Regulatory and Supervisory Framework documents downloaded from the MAS website, predicting the next character and repeating it many times, helped to clarify the answer.

MAS Video Capture

Training the same model on Shakespeare’s works and running both models side by side was fun!  

LSTM

 

Install MongoDB Community Edition and PyMongo on OS X

  • Install Homebew, a free and open-source software package management system that simplifies the installation of software on Apple’s macOS operating system.

/usr/bin/ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)

  • Ensure that you’re running the newest version of Homebrew and that it has the newest list of formulae available from the main repository

brew update

  • To install the MongoDB binaries, issue the following command in a system shell:

brew install mongodb

  • Create a data directory (-p create nested directories, but only if they don’t exist already)

mkdir -p ./data/db

  • Before running mongodb for the first time, ensure that the user account running mongodb has read and write permissions for the directory

sudo chmod 765 data

  • Run MongoDB

mongod –dbpath data/db

  • To stop MongoDB, press Control+C in the terminal where the mongo instance is running

Install PyMongo

pip install pymongo

  • In a Python interactive shell:

import pymongo

from pymongo import MongoClient

RoboMongo

  • Create a Connection

client = MongoClient()

  • Access Database Objects

MongoDB creates new databases implicitly upon their first use.

db = client.test

  • Query for All Documents in a Collection

cursor = db.restaurants.find()

for document in cursor: print(document)

  • Query by a Top Level Field

cursor = db.restaurants.find({“borough”: “Manhattan”})

for document in cursor: print(document)

  • Query by a Field in an Embedded Document

cursor = db.restaurants.find({“address.zipcode”: “10075”})

for document in cursor: print(document)

  • Query by a Field in an Array

cursor = db.restaurants.find({“grades.grade”: “B”})

for document in cursor: print(document)

 

  • Insert a Document

Insert a document into a collection named restaurants. The operation will create the collection if the collection does not currently exist.

result = db.restaurants.insert_one(

{

“address”: {            “street”: “2 Avenue”,            “zipcode”: “10075”,            “building”: “1480”,            “coord”: [-73.9557413, 40.7720266]        },

“borough”: “Manhattan”,

“cuisine”: “Italian”,

“grades”: [

{                “date”: datetime.strptime(“2014-10-01”, “%Y-%m-%d“),                “grade”: “A”,                “score”: 11            },

{                “date”: datetime.strptime(“2014-01-16”, “%Y-%m-%d“),                “grade”: “B”,                “score”: 17            }        ],

“name”: “Vella”,

“restaurant_id”: “41704620”

})

result.inserted_id

 

Using Python server to run d3js code from local Windows directory

Some of the d3js code samples may produce errors in certain browsers when you try to run static files locally.
You can run python’s simplehttpserver while browsing the samples.

  1. Open up a new Command Prompt window:
    1. WinKey+R
    2. Input “cmd“.
    3. Enter
  2. Via the command line, navigate into the directory that you want served. For example, if your project folder is in your c:tmp folder, you could type:
    cd c:tmp
  3. To start the HTTP server type:
    python -m SimpleHTTPServer 8888 &
  4. To stop the HTTP server from the Command Prompt use the keyboard command Ctrl+C (⌃+C)
  5. Switch back to your web browser and visit the following URL: http://localhost:8888/