In Thoughts on building a library I introduced you to the concept of a personal library. In this part I will guide you through some issues I had with sorting and cataloging my library Categories After buying a ton of books over the last couple of years, I hadn’t figured out yet how to categorize…
When you finished reading part 1 of the introduction you might have wondered how to draw more than one line or curve into on plot. I will show you now. To make it a bit more interesting we generate two functions: sine and cosine. We generate our x-values with numpy’s linspace function import numpy as…
One of the things I always forget is date and time in Python. So message to myself: The strftime method is used for formatting (string_format_time) import datetime start_date = datetime.datetime.now() DATE_FORMAT = ‘%d/%m/%Y %H:%M’ print(start_date.strftime(DATE_FORMAT)) Her is a nice little Cheatsheet
Since Python 3.3 You can chain dictionaries which contain the same key in a prioritized order: from collections import ChainMap prio_1 = {“param_1”: “foo”} prio_2 = {“param_1”: “foobar”, “param_2”: “bar”} combined = ChainMap(prio_1, prio_2) print(combined[“param_1”]) # outputs ‘foo’ print(combined[“param_2”]) # outputs ‘bar’ The param_1 from the prio_1 dictionary is dominant, so it isn’t overwritten by…
Everyone is talking about error culture and that companies should embrace it. Jurgen Appelo sheds some light on this topic by bisecting the term “error” and introducing a tool to celebrate the right kind of errors. The grid The term “error” is broken down into mistake and failure. Mistake is a behavior, failure is an…
<=> is the NULL-safe equals operator SELECT * FROM reports WHERE NOT driver <=> user_id
This is part 2 of the 5 part series 15 Steps for successful Bootstrapping Time to Cash – When do I get my money? More important than “time to market” (when can I offer my product on the market) is “time to cash”: when do I get the money for my service? For a successful…
In my article My personal road map for learning data science in 2018 I wrote about how I try to tackle the data science knowledge sphere. Due to the fact that 2018 is slowly coming to an end I think it is time for a little wrap up. What are the things I learned about…
When you are working in an agile team e.g. Scrum you might have heard about the agile manifesto. Formulated in 2001 it influenced a lot of software developers and methodologies like Scrum. The Agile Manifesto consists of 4 values and 12 principles: Values Principles Our highest priority is to satisfy the customer through early and…