And my recipe for setting up Python environment on Mac. — If you are interested for the recipe only, please scroll down to the recipe section. Struggle That is, there are numerous of times, and this even happened to myself when I was new, that multiple Pythons that came from different sources were mingled in the machine, waiting eagerly to teach someone…

A Clojure program to reverse translate numbers to phonewords. — The inspiration of this article came from the Cousera course, Functional Programming in Scala. I basically translate the Scala program in section 6 into the Clojure version you’re about to see. Kudos to Martin Odersky. You might have seen ads with interesting phone numbers like: 1–800-FLOWER, 1–800-FREE-411, or 1–800-GOT-JUNK. Those…

It not only seems that the lazy programmer gets the job, but also the lazy programs these days. I first encounter Python’s laziness in my discovery of Python’s usages of generators. This is especially true in modern Python, a.k.a. Python 3, where lots of functions return generators in favor of…

My story of finding a way to share the thing I love — Have you ever had the feeling that you got so passionate about something that you have to share it to everyone around you? You gotta force people to be passionate about it, am I right? I was so thrilled about Python two years ago, on the day I finally understood…

Lessons from learning on the job without much experience — Imaging you are given a brand new web project, some vague requirements, and a ton of freedom to choose the technical stacks, will you take it? My answer while a couple of months back was… “Hell yeah!” …

Sharing the recipe of composing namedtuple from namedtuples. The problem: One namedtuples is great, two better. But how do I combine the two namedtuples to get the best nametuple of all? For example, how to combine the Square class with Color class? Square = namedtuple('Square', 'x0 y0 x1 y1') Color =…

This article is also cross-shared to Dev.to and my blog. Special thanks to Luciano Ramalho. I learned most of the knowledge about descriptors from his workshop in PyBay 2017 Have you seen this code or maybe have written code like this? from sqlalchemy import Column, Integer, String class User(Base)…

This article is a summary of what I learned from Philip Guo’s CPython internals: A ten-hour codewalk through the Python interpreter source code. I highly recommend his course. He go through great materials in his videos. You can think of this article as a companion text version of his course…

This post is originally shared on my personal blog. If you have trouble reading the code examples, please make sure to check out my blog. I have syntax highlighting there. “Closure is a turtle carrying its shell,” My favorite explaination to closures, quote by Raymond Hettinger. With closures, lots of…