September 21, 2020 Python Leave a comment

Using Machine Learning to Predict the Weather: Part 3

This is the final article on using machine learning in Python to make predictions of the mean temperature based off of meteorological weather data retrieved from Weather Underground as described in part one of this series. The topic of this final article will be to build a neural network regressor using Google’s Open Source TensorFlow library. For a general introduction into TensorFlow, as well a discussion of installation methods, please see Mihajlo Pavloski’s excellent post TensorFlow Neural Network Tutorial. Topics […]

September 21, 2020 Python Leave a comment

Formatting Strings with Python

Introduction Sooner or later string formatting becomes a necessary evil for most programmers. More so in the past before the thick client GUI era, but the need to have a specific string representation is still a common enough use case. My first introduction was back in college when I had an old-school prof that had a impure love for making us write Java console applications with neurotic specifications for outputting with the printf(…) function. One thing that held true then […]

September 21, 2020 Python Leave a comment

Python zlib Library Tutorial

What is Python zlib The Python zlib library provides a Python interface to the zlib C library, which is a higher-level abstraction for the DEFLATE lossless compression algorithm. The data format used by the library is specified in the RFC 1950 to 1952, which is available at http://www.ietf.org/rfc/rfc1950.txt. The zlib compression format is free to use, and is not covered by any patent, so you can safely use it in commercial products as well. It is a lossless compression format […]

September 21, 2020 Python Leave a comment

A SQLite Tutorial with Python

Introduction This tutorial will cover using SQLite in combination with Python’s sqlite3 interface. SQLite is a single file relational database bundled with most standard Python installs. SQLite is often the technology of choice for small applications, particularly those of embedded systems and devices like phones and tablets, smart appliances, and instruments. However, it is not uncommon to hear it being used for small to medium web and desktop applications. Creating a Database and Making a Connection Creating a new SQLite […]

September 21, 2020 Python Leave a comment

Scheduling Jobs with python-crontab

What is Crontab Cron is a software utility that allows us to schedule tasks on Unix-like systems. The name is derived from the Greek word “Chronos”, which means “time”. The tasks in Cron are defined in a crontab, which is a text file containing the commands to be executed. The syntax used in a crontab is described below in this article. Python presents us with the crontab module to manage scheduled jobs via Cron. The functions available in it allow […]

September 21, 2020 Python Leave a comment

K-Means Clustering with Scikit-Learn

Introduction K-means clustering is one of the most widely used unsupervised machine learning algorithms that forms clusters of data based on the similarity between data instances. For this particular algorithm to work, the number of clusters has to be defined beforehand. The K in the K-means refers to the number of clusters. The K-means algorithm starts by randomly choosing a centroid value for each cluster. After that the algorithm iteratively performs three steps: (i) Find the Euclidean distance between each […]

September 21, 2020 Python Leave a comment

Levenshtein Distance and Text Similarity in Python

Introduction Writing text is a creative process that is based on thoughts and ideas which come to our mind. The way that the text is written reflects our personality and is also very much influenced by the mood we are in, the way we organize our thoughts, the topic itself and by the people we are addressing it to – our readers. In the past it happened that two or more authors had the same idea, wrote it down separately, […]

September 21, 2020 Python Leave a comment

Accessing the Twitter API with Python

Introduction One thing that Python developers enjoy is surely the huge number of resources developed by its big community. Python-built application programming interfaces (APIs) are a common thing for web sites. It’s hard to imagine that any popular web service will not have created a Python API library to facilitate the access to its services. A few ideas of such APIs for some of the most popular web services could be found here. In fact, “Python wrapper” is a more […]

September 21, 2020 Python Leave a comment

Enhancing Python with Custom C Extensions

Introduction This article is going to highlight the features of CPython’s C API which is used to build C extensions for Python. I will be going over the the general workflow for taking a small library of fairly banal, toy example, C functions and exposing in to a Python wrapper. You might be wondering… Python is a fantastic high level language capable of just about anything, why would I want to deal with messy C code? And I would have […]

September 21, 2020 Python Leave a comment

Introduction to Neural Networks with Scikit-Learn

What is a Neural Network? Humans have an ability to identify patterns within the accessible information with an astonishingly high degree of accuracy. Whenever you see a car or a bicycle you can immediately recognize what they are. This is because we have learned over a period of time how a car and bicycle looks like and what their distinguishing features are. Artificial neural networks are computation systems that intend to imitate human learning capabilities via a complex architecture that […]

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