kevin-snippet

sudo defaults write /Library/Preferences/com.apple.windowserver DisplayResolutionEnabled -bool YES;
sudo defaults delete /Library/Preferences/com.apple.windowserver DisplayResolutionDisabled;

// by the way, you need to logout and log back in for this to take effect.  Or at least that's what
// Quartz Debug says.  Who knows, maybe it's lying?

// P.S. Go to [Apple menu --> System Preferences --> Displays --> Display --> Scaled] after logging
// back in, and you'll see a bunch of "HiDPI" resolutions in the list to choose from.

kevin-snippet

Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:
    print i**2