Jupyter for SRE
Jupyter is a tool that came out of the data science community. In science, being able to replicate experiments is of the utmost importance -- so a tool where you can "show your work" is helpful. However, being able to show your work -- have colleagues validate what you have done, repeat …read more
Write Python like an expert
Interesting text encodings (and the people who love them)
(Thanks to Tom Prince and Nelson Elhage for suggestions for improvement.)
Nowadays, almost all text will be encoded in UTF-8 -- for good reasons, it is a well thought out encoding. Some of it will be in Latin 1, AKA ISO-8859-1, which is popular in the western world. Less of it …read more
Exploration Driven Development
"It's ok to mess up your own room."
Sometime there is a problem where the design is obvious -- at least to you. Maybe it's simple. Maybe you've solved one like that many times. In those cases, just go ahead -- use Test-Driven-Development, lint your code as you're writing, and push a …read more
Brute Forcing AES
Thanks to Paul Kehrer for reviewing! Any mistakes or oversights that are left are my responsibility.
AES's maximum key size is 256 bits (there are also 128 and 192 bit versions available). Is that enough? Well, if there is a cryptographic flaw in AES (i.e., a way to recover …read more
Announcing NColony 17.9.0
SSH to EC2
Image Editing with Jupyter
With the news about MS Paint going away from the default MS install, it might be timely to look at other ways to edit images. The most common edit I need to do is to crop images -- and this is what we will use as an example.
My favorite image …read more