Python

Docker Compose is a powerful tool that allows developers to define and manage multi-container applications. In this blog post, we will explore a Docker Compose file for developing Python applications. Specifically, we will analyze the following Docker Compose file: version: '3' services: mypthontool: image: python:3.9 volumes: - ./:/app/ tty: true Now all that is left to do is bring the container online with docker compose up -d and access the bash terminal in the container to run our code in a repeatable environment using docker exec -it <container name> /bin/bash. ...

Cryptocurrencies have been back on the popular agenda lately, thanks mostly to the surging value of Bitcoin. I have been interested, but not massively invested in cryptocurrency for many years. If I had the courage to buy and hold all those years ago, I might be writing to you from a beach – I assure you, this is not the case! I have been getting into InfluxDB lately and its fantastic ability to store heaps of time series data. Well, using python and Coinbase, I am going to show you how to collect bitcoin (and other crypto assets) price data and store it in InfluxDB… then we are going to make some neat panels in Grafana to help us realise our data. This is going to be a longer write up than most, so here is here are links to each section: ...

A quick GitHub gist for anyone looking to write to an InfluxDB server with Python3. This is a generic function that accepts three inputs; as an example, I am using temperature data in degrees Celsius. Turning DHT11 readings into beautiful graphs in Grafana Once you have your data in influxDB, a great way to visualise it is using Grafana. I hope to bring you more posts in the future about visualising your python data with Grafana. ...

I have covered this a number of times in the past and the posts have proved popular and useful to many. So, here is my guide for updating to the latest version of Python 3 (3.9) on Debian 10 Buster. To clarify the purpose of this guide, Debian 10 ships with Python 2 (2.7) and Python 3 (3.7) installed at my time of writing. For those wishing to upgrade from python 3.7.X to 3.8.X or 3.9.X, this is the guide for you. If you are trying to configure python 3.7 as your default interpreter when you call ‘python‘, try this: CHANGING THE DEFAULT PYTHON VERSION IN DEBIAN. This method involves using the ‘update-alternatives‘ command. We will be using a similar method in this guide, however this time we only do so to give 3.9.X a higher priority to 3.7.X, rather than uninstalling older versions. ...

Compound stonks only go up! I have a growing interest in finance and analytics, so it felt like a great idea to start creating my own set of financial tools with Python. This article will explain how I created a simple but effective script for calculating compound interest with Python. I wrote this in Python 3 (as all new Python projects should be from now onwards), but the library dependencies are very lightweight, making this something that could easily be re-written from Python 2. ...

A quick Google of the above only seemed to give me answers for the inverse, calling a python script from a bash shell and handing it variables. At least, the first 3 results showed this and I’m probably not alone when it comes to scrolling down past the StackOverflow articles. So I am had to go it alone and the way that I figured out how to call a bash command with variables in Python (3), is a total hack… But it works. This is commonly referred to as ‘getting the job done’ code. ...

This is my lean and effective way to monitor your public IP address with Python, specifically Python3. The script – code and GitHub link below – runs on a continuous loop, which I covered in a previous post: here. NOTE: this code is reliant on the dig system command – so this essentially only work on a unix based system. I was running this on a Debian install. import os import subprocess import re import time print("start monitor vpn monitor check") expected_IP: "0.0.0.0" # ENTER YOUR EXPECTED PUBLIC IPv4 ADDRESS HERE current_IP: subprocess.check_output("dig +short myip.opendns.com @resolver1.opendns.com", shell=True) try: while True: if expected_IP in str(current_IP): print("IPs Match - Things are normal") else: print("Current IP: " + str(current_IP) + "\nIP NOT AS EXPECTED!") #Code to complete actions called here time.sleep(60) # Change this timer to reduce/increase time between checks (seconds) except KeyboardInterrupt: print("\nHard Exit Initiated. Goodbye!") https://github.com/Tombo1001/PyIPmonitor ...

Here is a quick guide on how to create an infinite loop in python using a ‘while true’ statement. There are number of reason that you might want to implement this; a great use case would be outputting a fluctuating variable to the terminal such as a temperature reading from a sensor. loops that make your brain hurt A ‘while true’ statement allows us to run a sequence of code until a particular condition is met. In order to make that sequence of code run in an infinite loop, we can set the condition to be one that is impossible to reach. Better still, we can simply omit the condition altogether to ensure that the while true loop never ends. ...

Note: Python 2.7 EOL has now passed. This article is kept for historical reference — if you’re still running Python 2.7 in production, the migration guidance here remains relevant, but the urgency framing is dated. 1st January 2020 marked the official end of python 2.7 development, including feature support and security fixes. Python 2.7 was over 9 years old in development years, making it the longest supported version to date. The code freeze is no in place, with the final release – 2.7.18 – scheduled for an April 2020 release. So yes there will be one more version to come down the tubes but it’s probably best that the new python project you were thinking of starting is written in 3.7 or above. ...

They say that the long tail page titles are best for SEO, well this one certainly should be up there with the best of them. In this post, I am going to explain how easy it is to control Kasa a HS100 / HS110 with IFTTT and python webhooks. Using this basic code, you expand into building a very powerful home automation system which fits your needs and take your Kasa home automation to the next level. ...