dietercastel

from PIL import Image
import PIL.ImageOps
#Using PIL/pillow (install with 'pip3 install pillow' ) 
name = 'RPS-g2.jpg'
outname = 'RPS-g2.png' #png extension
im = Image.open(name)
inv = PIL.ImageOps.invert(im) #invert opperation
inv.save(outname)

mbilokonsky

Thinking Like a Function

Part 1: What's a function?

As a software engineer, you probably think of a function as a unit of code that takes some arguments and returns some value, eg:

 function square(x) { 
   return x * x;
 }

lgg

• Original article
• Wayback machine

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Keepass file format explained

I’m currently working (I’m just at the beginning, and I’m quite slow) on a personal project that will use Keepass files (kdb and kdbx).
I tried to find some documentation about .kdb and .kdbx format, but I didn’t find anything, even in the Keepass official website. I you want to know how these file formats are structured, you must read Keepass’s source code. So I wrote this article that explains how Keepass file format are structured, maybe it will help someone.