Read list of a dictionaries

My students wanted a quick example of how to read a list of a dictionaries in Python. So, here it is:


# Declare list of dictionaries.
cakes = [{'cake':"vanilla",'frosting':"chocolate"}

# Read the list of dictionaries.
for lkey, lvalue in enumerate(cakes):
  print lvalue['cake'] + " with " + lvalue['frosting'] + " frosting."

Naturally, a list can contain many things and you should ensure each value you read is a dictionary before trying (more...)

10 Things I Love About Tech- Python Edition

So since I already complained about what I hate about tech from a diversity and culture perspective, I felt I needed to explain all the things I love about tech and why I wouldn’t want to be anywhere else.

Everyone would expect me to start with databases or virtualization, but I thought I’d keep everyone on their toes and start with my favorite programming language- PYTHON!

1.Timed (more...)

Installing PIP for Python

If you’re on a Mac running macOS Sierra, you can install PIP to add packages. PIP stands for either of the following:

  • PIP installs Packages
  • PIP installs Python

You use the following to install the PIP utility:

sudo easy_install pip

It should return the following:

Searching for pip
Best match: pip 9.0.1
Processing pip-9.0.1.tar.gz
Writing /tmp/easy_install-ryxjDg/pip-9.0. (more...)

OBIEE Component Status Notifications

At Rittman Mead, we often hear requests for features or solutions generally not provided by Oracle. These requests range from commentary functionality to custom javascript visualizations. There are many ways to implement these functionalities, but organizations often lack the in-house resources to engineer an acceptable solution.

Rittman Mead has the capability to engineer any solution desired, and in many cases, has already developed a solution. Many of our accelerators currently offered, such as Chit Chat (more...)

Python variable not defined

While working with a programming example for my students, I ran into an interesting run-time error when I changed their approach to importing Python’s random module. Here’s the raised error message:

Traceback (most recent call last):
  File "", line 84, in 
    speed = [choice([-2,2]), choice([-2,2])]
NameError: name 'choice' is not defined

You raise the missing choice identifier when two things occur. The first thing requires you to use a standard import statement, like the (more...)

Install PyGame on Fedora

The PyGame library is a wonderful tool for building games with Python. It lets you accomplish a great deal by simply managing events. You need to understand how to use Python functions, modules, and events to build games with this Python library.

You can download and install the PyGame library with the yum utility like this:

yum install -y pygame

It should generate the following list when you install it as the root user:

Loaded  (more...)

Install EasyGUI on Fedora

The EasyGUI library is a nice tool for developing GUI applications. It doesn’t require you to know event-driven programming to write basic GUI applications because it’s based on Python functions.

You can download and install the EasyGUI library with yum utility like this:

yum install -y python-easygui

It should generate the following list:

Loaded plugins: langpacks, refresh-packagekit
mysql-connectors-community                                  | 2.5 kB  00:00     
mysql-tools-community                                       | 2.5 kB  00:00     
mysql56-community                                           | 2.5 kB  00:00     

Building Classrooms in the Cloud

Jumpbox Lab Server

Let’s face it: education without interaction is about as effective as shouting origami instructions at a lumberjack who is cutting down trees. Sure, your informative lessons will come in handy when the product of their work finally becomes paper, but it will be long forgotten and ultimately worthless by then. The only way a student is going to learn is if they can put (more...)

Basic Python Object

One of my students wanted a quick example of a Python object with getters and setters. So, I wrote a little example that I’ll share.

You define this file in a physical directory that is in your $PYTHONPATH, like this:

class Coordinate:
  def __init__ (self, x, y):
    self.x = x

Create a Python Module

Sometime formal programming documentation is less than clear. At least, it’s less than clear until you’ve written your first solution. The Modules section of the Python language is one of those that takes a few moments to digest.

Chapters 22 and 23 in Learning Python gives some additional details but not a clear step-by-step approach to implementing Python modules. This post is designed to present the steps to write, import, and call a Python module. (more...)

Fabric … Simple #GoldenGate Administration over SSH


For awhile now, I’ve been looking at different approaches for automating some of my GoldenGate monitor tasks. Yes, there are tools out there that provide a wide variety of ways for interaction and monitoring of Oracle GoldenGate. However, the problem with Oracle GoldenGate is that you have at least two parts of the equation when interacting or monitoring an environment, i.e. source and target. If you are so lucky to have a multi-master (more...)

A Neural Network Scoring Engine in PL/SQL

Topic: In this post, you will find an example of how to build and deploy a basic artificial neural network scoring engine using PL/SQL for recognizing handwritten digits. This post is intended for learning purposes, in particular for Oracle practitioners who want a hands-on introduction to neural networks.


Machine learning and neural networks in particular, are currently hot topics in data processing. Many tools and platform are now easily available to work and experiment  (more...)

“What do you mean there’s line breaks in the address?” said SQLLDR

I had a large-ish CSV to load and a problem: line breaks inside some of the delimited fields.

Like these two records:

one, two, "three beans", four
five, six, "seven
beans", "eight wonderful beans"

SQL Loader simply won’t handle this, as plenty of sad forum posts attest. The file needs pre-processing and here is a little python script to do it, adapted from Jmoreland91’s solution on Stack Overflow.

import sys, csv, os

Rename multiple exported Files after using SQL Developer’s Cart to export from Oracle database

If you’re searching for “export Oracle BLOB”, the article, by Jeff Smith, titled “Exporting Multiple BLOBs with Oracle SQL Developer” using Oracle SQL Developer” is usually at the top of the search result. The SQL Developer features the Shopping Cart without using scripts to export BLOBs out of database. I don’t want to go into detail as Jeff already explained well in his post what it is and how to use it. One (more...)

Multisessioning with Python

I'll admit that I pretty constantly have at least one window either open into SQL*Plus or at the command line ready to run a deployment script through it. But there's time when it is worth taking a step beyond.

One problem with the architecture of most SQL clients is they connect to a database, send off a SQL statement and do nothing until the database responds back with an answer. That's a great model when (more...)

Wanted: RDBMS superpower summary for app developers

At last night's WWCode Cincinnati panel, I recommended that developers talk to their DBA about what advanced capabilities their RDBMS can offer, so that they don't end up reimplementing functionality in the app that are already available (better and more efficiently) in the database itself. Devs can waste a lot of effort by thinking of databases as dumb, inert data boxes.

I was asked an excellent question: "Where can a dev quickly familiarize herself with (more...)

IoT Hackathon Part IV : Using Web Services to send Sensordata

In the previous 3 posts, building towards the eProseed IoT Hackathon, I described how to setup your Raspberry Pi, and how to use the GrovePi sensors. The used example is a small weather-station that read temperature and humidity and shows the readings on a display. That is all very nice, however, the data remains local on the Raspberry Pi so there is nothing that we can do with this information

Code Studio rocks; diversity does, too

If you want to quickly get some kids introduced to computer programming concepts, you could do a lot worse than using Code Studiofrom That's what I did the last couple weeks - took two hours to lightly shepherd the Dayton YWCA day camp through a programming intro.

It's really well-organized and easy to understand - frankly, it pretty much drives itself. It's based on block-dragging for turtle graphics and/or simple 2D games, (more...)

Generating Diceware Passwords in Python

Today I’m going back to a theme from a post last year and looking at generating passwords with my favourite programming language. A tweet from Simon Brunning pointed me to Micah Lee’s article at The Intercept and my first thought was to write a function to do this in Python. So here it is;

def generate_diceware_password(word_count=6):
    import random
    word_dict = {}
    passphrase = []
    with open('diceware.wordlist.andy.txt') as f:
        for line in f. (more...)


I've never had a tool I really liked that would extract a chunk of a large production database for testing purposes while respecting the database's foreign keys. This past week I finally got to write one: rdbms-subsetter.

rdbms-subsetter postgresql://user:passwd@host/source_db postgresql://user:passwd@host/excerpted_db 0.001

Getting it to respect referential integrity "upward" - guaranteeing every needed parent record would be included for each child row - took less than a day. Trying to get it to also guarantee (more...)