programming

I made this color contrast checker. You can specify colors either by entering hex triplets (e.g. #00ffdd) or using your browser’s built-in color-selecting widget. It will compute the contrast ratio and determine if the color contrast meets the WCAG 2.1 accessibility success criterion 1.4.3 (AA) or 1.4.6 (AAA). Color contrast checker Source code (Codeberg) (MIT License)

Earlier this week I posted about this treemap I made. (Interactive version) Today, I have placed the code to produce this treemap in a Codeberg repo. It’s not the most beautiful code in the world. (If I were really ambitious, I’d turn it into a proper library.)

This is a treemap of every county (or county equivalent) in the United States, where the area of each rectangle is proportional to the population of the corresponding county. Counties that are part of the same core-based statistical area are grouped together. (These have a thicker green border.) Moreover, core-based statistical areas that belong to the same combined statistical area are grouped together. (CSAs have an even-thicker red border.) For example, the red rectangle in the upper-left corner represents the New York-Newark, NY-NJ-CT-PA CSA:

It’s like a off-by-one error on your wedding day. >>> from plusonedecorator import plus_one >>> @plus_one ... def cost(quantity: int, marginal_cost: float) -> float: ... """Compute the cost of production.""" ... return quantity * marginal_cost ... >>> cost(1000, 0.25) 251.0 >>> @plus_one ... def invite(name: str, pronoun: str) -> str: ... """Decide to invite someone to your wedding.""" ... return f"Let's be sure to invite {name} and {pronoun}." ... >>> invite("Emilia", "her") "Let's be sure to invite Emilia and her plus one.

I’m like a pâtissier, except I decorate functions instead of cakes, and I decorate with U+1F4A9 instead of frosting. >>> from aholedecorator import a_hole >>> @a_hole ... def hello(name: str = "friend") -> str: ... return f"Hello {name}, I hope you are well." ... >>> hello() 'Hello friend, I hope you are well.' >>> hello() Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/chris/Documents/projects/gists/a_hole_decorator/aholedecorator.py", line 70, in new_func raise AHoleError(choice(_MESSAGES)) aholedecorator.

Recently, I’ve been exploring the type hints functionality in Python. The other day, I ran across what I think is a bug (already known) in mypy. Here is a minimal working example of the issue I came across: 1 2 3 4 from fractions import Fraction my_value = 1 + sum([Fraction(k + 1, 5 ** k) for k in range(5)]) print(f"The result is {my_value}.") This program runs as you would expect.

Here’s another fun thing I made. GitHub repo

I spent way too much time working on this. Enjoy!

I’ve created a GitHub repository based on the New York Times’ COVID-19 database. The New York Times has been compiling COVID-19 data from various state health departments. They have published the data as a GitHub repository. There are two files of interest in their repository: us-states.csv and us-counties.csv. In these CSV files, each row represents the number of (confirmed) cases and deaths in a particular geographical area as of a particular date.