I am a Slovak-Canadian and I often type in the Slovak language. I do not own a Slovak keyboard and wanted to come up with a programming solution that allows me to automatically add Slovak accents to unaccented words I type using my regular English keyboard. There are solutions for Chrome browser or Firefox, but I wanted to have this option everywhere, in any program on any OS. Hence I decided to code it in Python. In this short article, I demonstrate how to use global keyboard hooks and SQLite database in Python to automatically add Slovak accents (diacritics) to text typed to any program running under Windows or Linux. This example can be easily used to adjust the program to any other foreign language. [Read more…]
Splunk Enterprise is presumably one of the best platforms for gaining real-time intelligence from data. The following short tutorial explains how to install Splunk server (on Windows or Linux server) and how to use Python to programmatically query Splunk and visualize Apache data by plotting them on a graph by using the Matplotlib library. In this post, show step by step, how to add Apache logs to Splunk, and illustrate how relatively easy is to use Python to query how much bandwidth was consumed by one of my websites (in the past week, in megabytes). [Read more…]
The following is a short article on the basics of creating graphical user interfaces (GUI) in Python by leveraging Tkinter (interface to the Tk GUI toolkit). We’ll cover fundamentals such as creating a brand new window, centring the window on the screen, sizing it to desired dimensions, as well as giving the window a title and configuring it with its own icon. We also cover the basics of placing a new label and button on the window and wiring a new function that changes the text of our label with each button click. [Read more…]
Tor is free software that prevents people from learning your location or browsing habits by letting you communicate anonymously on the Internet. This article outlines the process of installing TOR and shows how to communicate through the TOR network by using the Python programming language. [Read more…]
The following short article shows just how simple it is to use Python programming language in a data science project. In this example, we’ll first go to Statista.com (public dataset provider) and download the MS Excel dataset that contains the list of 100 largest companies in the world. The file that contains only two columns, the company name and their current market value. Our goal is to use Python to read the rows and cells inside the Excel file and use it to search the internet for some additional information, such as the company’s headquarters location and it’s map coordinates (latitude and longitude). You’ll see how easily this can be done by using Python web-scraping capabilities. We’ll also show how to write the newly found information back into the Excel sheet and use it to create an infographic that shows the headquarter location of 100 of the world’s top companies on the map.
Recently, I came across a post from 2001 which allowed downloading the entire collection of UTZOO NetNews Archive of earliest USENET posts. These were essentially the earliest available discussions posted to the Internet by folks working for various Universities connected to the Internet. Millions of posts created between Feb 1981 and June of 1991.
Until 2001, these early Usenet discussions were considered being lost, but miraculously Henry Spencer from the University of Toronto, Department of Zoology was backing it up onto magnetic tapes and kept them stored for all these years (apparently at the great cost).
H. Spencer had altogether 141 of these magnetic tapes, but there were of no use, so eventually, him and a couple of motivated people such as David Wiseman (who dragged 141 tapes back and forth in his a pickup truck), Lance Bailey, Bruce Jones, Bob Webber, Brewster Kahle, and Sue Thielen; embarked on a process of converting all of these tapes into regular format, accessible to everyone.
And that’s the copy I downloaded. What a treasure, right?
Well, not so fast, once I unzipped the data, I realized that the TGZ format contains literally millions of small text files (each post in its own file). While it was certainly nice to have, it wasn’t something that I or anyone else could read. Certainly not in a forum like discussion format, it wasn’t obvious which post is the one that starts the discussion or which ones are the replies to the thread. And forget about searching through these files, that was utterly not possible. Just to put things into perspective, it took me over 5 hours to just unzip the archives.
That said, it didn’t take long for me to decide to develop a Java-based converter that would attempt to convert the entire collection from millions of flat files into a fully searchable MySQL database. The following post talks about the process and also includes the Java code of the solution released as open source.
Recently I came across a situation where I needed to create a one-click web-based solution, that allows clients to open and edit PhotoShop, AutoCAD, WordPerfect, PDF, LibreOffice and other files hosted remotely from my WebDAV enabled Apache web server by using their own desktop tools. Essentially I needed a solution for opening and editing remotely hosted documents (located on my web server) through a simple HREF link on a web page. This link, when clicked, would automatically open the PSD file hosted on my server, but do so in the PhotoShop installed on the client’s Windows computer, allowing them to seamlessly open and edit such files, without any need to download and upload the files back and forth to my server. Initially, it seemed like an impossible, task, but then I realized that I should be able to create my very own custom browser URI scheme and some kind of a Windows-based client that handles opening of remote files in local installation Photoshop. After a bit of playing around with it, I got it working and created a solution capable of opening for remote editing not only PhotoShop files, but virtually any other remotely hosted file types in their associated applications, meaning in the software installed on the client’s desktop computer . The following article is how I went about it. [Read more…]
Tor is a free software that prevents people from learning your location or browsing habits by letting you communicate anonymously on the Internet. This article outlines the process of installing TOR on a Centos/RHEL 7 server and shows how to communicate programmatically through TOR network by using cURL in PHP. [Read more…]
With the recent fast adoption of Internet and cloud environments, the focus of software development shifted from building single user type applications, into a realm of constructing software capable of handling numerous local or remote users. The core benefit of multi-user applications lies in their capacity to tolerate synchronized access from simultaneous users. Other advantages often include the ability to support different types of desktop and mobile devices using a variety of operating systems. [Read more…]
I am not using NetBeans myself but had to work with it on one of the projects. Here is a short guide on how to clone Github project into NetBeans.
The Java recognizes the limited nature of abstract classes and interfaces and their inability to become an object or a traditional class. Nevertheless, it is the absence of the qualities above and the ability to use abstract classes in various objects that proves to be incredibly useful to developers. In this article, I briefly outline the possible application of abstract classes and interfaces as well as provide examples to highlight the contrast between them.
In this article, I illustrate the process of writing a simple Java program. [Read more…]
The following article explains why Java does not support operator overloading and looks at the exception of overloading strings in Java and outlines other concepts, such as method overloading.