Streamlining Git Workflows for Developers and Operators
Managing code in a collaborative environment can be challenging, especially when multiple team members contribute to the same project. In this post, we’ll explore three […]
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Tracking Orders with Interactive Brokers API: The Importance of reqOpenOrders and Client ID
When working with the Interactive Brokers (IB) API, one of the most essential components for effective order tracking is understanding the role of client ID […]
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Building a Simple and Consistent Log Structure for Python Programs with Log Rotation
Logging is an essential part of any robust Python application. It provides insights into how your program runs, tracks errors, and helps with debugging. In […]
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Setting Up a Mail Server with Postfix: A Step-by-Step Guide
When setting up a mail server on Linux, Postfix is one of the most popular choices for a mail transfer agent (MTA). Whether you’re sending […]
Continue reading »How to Prevent SSH Inactivity Timeouts: A Complete Guide
SSH sessions timing out due to inactivity can be frustrating, especially when you’re running long processes or working intermittently. Fortunately, you can configure both the […]
Continue reading »How to Add “Open Folder in VS Code” to Nemo’s Right-Click Menu on Linux Mint
If you’re a developer working in Linux Mint, chances are you use Visual Studio Code (VS Code) as your go-to editor. It’s powerful, lightweight, and […]
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Filling Missing Data in Time Series Using Python and Pandas
Handling missing data in a time series is a common challenge when working with datasets, especially in domains like finance or IoT, where data might […]
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How to Build and Test a Reusable Python Package: A Black-Scholes Options Calculator Example
Creating reusable Python packages can greatly enhance your productivity and code management. In this blog post, we’ll walk through building a reusable package for a […]
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The Evolution of Stock Exchanges: From Floor Trading to Electronic Trading
Introduction The global financial markets are supported by a vast network of stock exchanges, each with its unique history, regulatory environment, and technological advancements. There […]
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Understanding IBAPI’s Session/ClientID and OrderID in a Multi-Host, Multi-Account Environment
Posted on June 17, 2024, by Peter Andersson Introduction Managing the client and order ID in a straightforward environment with a single IBAPI application and […]
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How to use all your cores in your super Linux PC
My new hardcore PC har 24 cores. Twentyfour! Most of them sits idle when I run my code. It’s a bloody waste! Also, it is […]
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Python versions
Overview of major enhancements in each version Python 3.6 (released December 2016) Formatted string literals (f-strings): name = “World” print(f”Hello, {name}!”) Underscores in Numeric Literals: […]
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Efficiently Using bump2version with Python and Git
Versioning your software is crucial for tracking changes, debugging, and ensuring compatibility. When working with Python projects in Git, one popular tool to help automate […]
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Unveiling ChatGPT: A Game-Changing AI Conversation Partner
Artificial intelligence (AI) has been transforming our world at an unprecedented pace. One of the most promising advancements in this field is ChatGPT by OpenAI. […]
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SSH – Secure Shell Tips and Tricks in 2023
What you need to know There are several benefits of using SSH (Secure Shell) for remote access and file transfer: Overall, SSH is a powerful […]
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Machine Learning – the foundation of AI
Machine learning is a field of artificial intelligence that enables machines to learn from data and make predictions or decisions based on that learning. This […]
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Roll the dice! Monte Carlo Simulations in Python
Monte Carlo simulations are a powerful tool used to model a wide range of phenomena in finance, engineering, physics, and other fields. They are based […]
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High Performance Python
Python is a high-level programming language known for its ease of use and readability. However, its interpreted nature often leads to performance issues when compared […]
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Setting up Python logging efficiently
The Python logging framework has been around for a long time, and with such a mature framework, it’s quite natural that the number of features […]
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Running a Python Flask application under Apache
When developing a Flask application, you normally run it from the terminal using flask run or in the code app.run() But when the app is […]
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Python modules and packages
“In the summertime, when the weather is hot…” It’s time to write a note about modules and packages in Python. A module is a python […]
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Building a Telegram client in Python
Telegram is an application for encrypted chats that has gained enormous popularity. Fully open source, it has a complete API both for endpoints (TDLIB) and […]
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About Genetic Algorithms
What is a Genetic Algorithm good for? Genetic Algorithms are most commonly used in optimization problems wherein we have to maximize or minimize a given objective […]
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About Volatility
Volatility is one of the most important attributes of any tradeable instrument. It indicates how volatile, or ‘risky’ if you will, the price is. But […]
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Howto setup a Python Flask application as a system service on Linux
With Flask you can have your backend coded in minutes, and with for example a Linode server you can get a $10/month-server up and running […]
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A simple JWT example with NodeJS and Python (part 2)
A continuation of https://blogg.fsh.se/2022/06/06/a-simple-jwt-example-with-nodejs-and-python-part-1/ This article describes the creation of a simple React client logging into the backend using JWT. The React client Keep track […]
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Setting up Rabbit MQ Server
Here are some quick notes that I refer to when installing Rabbit MQ server on Linux. Installation Read and follow: https://www.rabbitmq.com/download.html Quickstart Make sure the […]
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A simple JWT example with NodeJS and Python (part 1)
The following example is built using a Python Flask backend, a CURL-script to test it, and a simple React frontend that logs in, gets an […]
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How to “forget” a file tracked in Git
I often do this: I hurry creating a git repository, do a quick “git add .” and commits. Afterworth, after a few more commits, I […]
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Adding a million rows from CSV file to a Mysql database table using Python and Pandas!
Do you have a lot of CSV files, with sometimes many rows of data that you need to import to a Mysql database? You could […]
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Where do you add initialization code in a Spring Boot application.
Some people think Spring and Spring Boot adds to much “magic” to a Java app, and to some extend I agree. Have they gone too […]
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Using annotated Spring Boot entities in a Library
When I moved a bunch of classes from a rather large Spring Boot application into a separate library (se more about that process here), I […]
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Why Windows Suck
Why it sucks? The TL;DR is “It’s not Linux”. I really want to like Windows. And God knows I have tried. A couple of times […]
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Installing a certificate using LetsEncrypt on a Ubuntu server with Apache (New version 2022-08-15)
Running webservers on own hardware I develop a lot of websites, and I run them on my own hardware (a Ubuntu Server). When developing (on […]
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PATH
How the system path is set is quite complicated, depending on your system and shell setup. But for the most common one (Linux Mint/Bash in […]
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Massuploading pictures using ActiveStorage
ActiveStorage is a gem, I really think so. Before AS, whenevener I needed to attach a “blob” (image or other document) to a model it […]
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Detecting colors in a webcam feed
A friend asked me to help debug an app that tried to detect three different colors. It was written in Python and used three precreated […]
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Fantasy Football analysis using python and pandas
[iframe height=1000px src=”https://blogg.fsh.se/jupyter_notebooks/fantasy_football.html”]
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Great color themes for your Linux terminal
The major difference between Linux and Windows is the quality of the terminal. I would say the comparison is like comparing a with a But […]
Continue reading »Creating a Desktop shortcut in Linux Mint
In ~/Desktop, create a file named Eclipse.desktop with content: [Desktop Entry] Version=x.y Name=ProgramName Comment=This is my comment Exec=/home/peter/Documents/exec.sh Icon=/home/peter/Pictures/icon.png Terminal=false Type=Application Categories=Utility;Application; if you need […]
Continue reading »The amazing power of Python and the Pandas framework!
This code connects to a Mysql database, reads ths content of a table and imports it into a Dataframe. From there you can twist and […]
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Avoiding relative imports in a React app
Even with a moderately large React app, you try to structure your modules and end up here in the end: import ../../../components/dialogs/enter.jsx WTF?? Good luck […]
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Ruby and Rails development environment
How do you setup VS Code, which is a great code editor, for Ruby development? Well you start by installing these gems: gem install solargraph […]
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Removing Mysql completely!
It’s not as straightforward as you might think to completely remove MySQL from your linux box. Here are the details: Use apt to uninstall and […]
Continue reading »Writing a websocket server using Ruby
I just found this amazing article about the finer details of Websockets, and how to implement a WS server using Ruby. I just had to […]
Continue reading »A few console.log gems you didn’t know about
Top 10 javascript console tips! Tip #0 console.assert() Tip #1 console.trace() Tip #2 console.time() && console.timeEnd() Tip #3 console.memory Tip #4 console.profile(‘profileName’) & console.profileEnd(‘profileName’) Tip […]
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Adding Redux to your React project
Installation Add the necessary modules yarn add react-redux yarn add redux Fix the component import {connect} from ‘react-redux’; // definition of DummyComponent here… const mapStateToProps […]
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Configuring the Spring Boot Actuator
The Actuator is a great tool. The documentation and history of changed configuration and implementation is however a big big mess. To cut a LONG […]
Continue reading »A simple but complete Highcharts example
This is how you can test the excellent Highcharts library. Make sure you have JQuery added first. <link rel=”stylesheet” href=”https://cdnjs.cloudflare.com/ajax/libs/highstock/6.0.2/css/highcharts.css” integrity=”sha256-ji+33kRPEXS0+FM/AbApEs8n5kT2UBiGyk36zs1F9gE=” crossorigin=”anonymous” /> Also include […]
Continue reading »Rubys magic language
This is a piece of code I keep to remind me of the magic in Ruby. class Main # you can dynamically define methods with […]
Continue reading »TWS API Resources
If you, like me, often code applications against the TWS API from Interactive Brokers, you will have good use of the following resources: The official […]
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Awesome Ruby
Yes it’s awesome, I know! But even more so, is the list of tools, gems and frameworks that are available for Ruby programmers. Here is […]
Continue reading »Setting up Python for development
Perfecting your Python development setup by RealPython Perfect Your Python Development Setup (Learning Path) – Real Python Optimize your Python development setup with this learning […]
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Managing multiple Python versions with multiple virtual environments
Since I was used to use rvm to handle multiple ruby versions, and a .ruby-version file which automatically switched version for me, of course I […]
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