Simple 2D graphics on OSX

What's a simple way to do simple 2D graphics on OSX?

Simple, as in "10 HGR2: HPLOT ...", not 'simple' as in 600-line framework wrappers &| D0InG 1T tH3 CyB3RsPaC3 W@Y dRaGgInG 3D gUi W1Dg3tS aR0U|\|D iN @N INt3rFaC3 BuIlD3R.

Suggestions using the supplied interpreted languages are fine (Perl, Python, etc.)

Strictly, English doesn't "usually" imply the exclusive or.  There are two or constructs:

The first:  A or B
The second:  Either A or B

The first implies a standard boolean or.  The second implies an exclusive or.  Unfortunately for those who don't enjor ambiguity in the language, the word "either" is significantly underused.