• How to INSERT INTO with psycopg2

    The most famous library to connect PostgreSQL from Python might be psycopg2. psycopg2 is a simple and easy library for the people who want to manipulate SQL simply. The usage is basically pretty straightforward but I got stuck when I tried to a record into PostgreSQL via psycogpg2. Here I... [Read More]
  • Deleting unused files in Chef cookbook

    When you use Chef cookbook, a lot of files might be installed in you machine, configuration, script and so on. Chef provides very useful resource for putting a file called template. You can put any type of text file with this resource. [Read More]
  • Optimization for neural network

    The other day I read this article. This post was written about the variation of gradient descent algorithm. Gradient descent is an de facto standard algorithm for optimizing deep learning. Iterative optimization algorithm such as gradient descent plays an important role in deep learning because there is no way to... [Read More]
  • Spark in Production

    Finally the book I wrote at the first time in my life has been published today. It is the first chance to write a published book written on paper. I’m amazed at the fact that I can complete to write a book in English though I’m not an native English... [Read More]
  • Data for our future

    If I remember correctly, I wrote such a post several years ago. I wanted to say that it is not important to keep just grief for our future. I believe only data can contribute improvement our life in future, emotion can be a support for keeping that action though. The... [Read More]