Overall design

• Logo in the front on the chest
• Black on white or white on black?
• Catchy phrase on the back.

Phrases

The initial list has been taken and trimmed from http://us.pycon.org/TX2007/Slogans

• Python, it bytes
• from pycon import *
• from Pycon_India_2009 import *
• "Python: So easy your boss can use it." (source: Garry Hodgson)
• "Beauty against complexity"
• Or we could go with the original spirit of Python, and have a code snippet wherein all classes, methods, and variables are named "Bruce" (in various states of capitalization) to avoid confusion.
• "Kindergardners get it. Hackers get it. Next stop: middle management."
• "Python, the other ubiquitous scripting language."
• "def generate(ideas): yield results"
• "Python: the only language you never knew you couldn't live without."
• "Python: Produce impressive results and have fun too!"
• "Python: have fun programming (again)!"
• "Python: One obvious way to do things right."
• "Python: swallows livestock"
• "Python: will eat your dog."
• "Python: Explicitly powerful"

• "from future import *"

• "Python: programming for human beings." +1
• "'Python's syntax succeeds in combining the mistakes of Lisp and Fortran. I do not construe that as progress.' -- Larry Wall, May 12 2004"
• "Anybody else on the list got an opinion? Should I change the language or not?" -- Guido van Rossum, 28 Dec 1991
• "Python: even though everyone's using it now, somehow it's still the coolest."
• "Any sufficiently advanced technology is indistinguishable from Python."
• "Any sufficiently advanced algorithm is indistinguishable from Python."
• "Any optimized general and generic C library is indistinguishable from Python."
• "Isn't it nice when things just work? Use Python."
• "Python: a scripting language can run the world."
• "Python: and now for something completely excellent."

• "The future is now!"

• "Nudge, nudge, wink-wink, say no more..."
• "Python: scale the heights of computing"
• "Braces? We don't need no stinkin' braces!"
• "Python 3000: 200% more zeroes than Python 2.0!"
• "Python for Productivity"
• "Python: Let the Snake Tempt You" (back of T-Shirt: A winking snake with an apple balanced on its nose)
• "Python: Welcome to the Tree of Knowledge" (back of T-Shirt: hackers around a tree with snake + apple)
• "Python: The Full Monty" (back of T-Shirt: a list of all the standard lib modules for python 2.5)
• "Everything * is easy with Python!"
• "Don't believe the hype"
• "It's explicit."
• "This week there's only one place to do it"
• In really small letters: "readability counts"
• or "rdblty counts"
• "Python: fits your pocket, your hardware, your brain!" +1
• "4 out of 5 people who arrange and design shrubberies recommend Python"
• Snakes on a brain! (or "snakes on the brain")
• Python: The Science Behind the Art
• Python aint no constrictor
• You should have seen me smile, the day I lost my braces
• What does Pythonic mean ?
• Choose Python: or Someone is Going to Get Fired +1
• Python: It's whats for dinner.
• Get your daily dose of Python. Now with Iron.
• Manager swallows Python whole. News at 11:00.
• Python - the wafer-thin mint of programming.
• Python: I indent, therefore I code
• self.respect()

• Comprehension for all !

• Let's get partial!
• Who's afraid of PEP talk?
• Purely pragmatic and objectively functional
• more Turing complete than the competition
• Don't apply, cause that's been deprecated.
• Celebrating the immaculate conception of the shortcut conditional expression
• "This is your brain on Python" (accompanied by an illustration of a human brain with a huge smile on it) +1
• My code doesn't run...it slithers!
• Python: less code, more results +1
• Python: Taste programming again for the first time. +1
• If the implementation is easy to explain, it may be Python. +1
• Python: Rehab for the semicolon.
• My other programming language is (also) Python.
• The origin of suffering lies in the use of not-Python.
• I'm not really a Wizard. I just use Python. +1
• Any technology distinguishable from Python is insufficiently advanced.
• Remember the Alamo. Forget the braces.
• Parental advisory - explicit language.
• Easy as Py.
• Python: so eye-opening that I can't C anymore!
• if code not in python: raise hell

• import antigravity or something from http://xkcd.com/353/ . Would need author's permission.

• "Simple is better than Complex" +1
• No braces; Just Easy Spaces +1