Python Quines

时间：2006-10-17 来源：linxh

Quines

A quine is a self-printing program

http://www.aims.ac.za/~mackay/python/quine/quine.html

Here is A good page about Quines by David Madore.

Quines are named after the American mathematician and logician Willard van Orman Quine.

Douglas R. Hofstadter coined the name in his book Godel, Escher, Bach.

the verb to quine (invented by Douglas R. Hofstadter) means "to write (a sentence fragment) a first time, and then to write it a second time, but with quotation marks around it" (for example, if we quine "say", we get "say 'say'"). Thus, if we quine "quine", we get "quine 'quine'", so that the sentence "quine 'quine'" is a quine...

In this directory are ten quines I wrote to help me learn python. (One or two of them (X) are not quines; they are deliberately broken for teaching purposes.)

Also, another 8 quines in python that I found on the internet

My quines
quine.py - rather large and awkward, but quite clear
X quine2.py - not a quine, but very close; uses def and exec
quine3.py - uses def and exec
X quine4.py - teaching aid
quine4a.py - works
Xquine4b.py
quine4c.py - works
quine5.py - uses def and exec; follows on from 4c
quine6.py - uses two types of quotes
quine7.py - uses def and exec; more compact
quine8.py - more compact still
quine10.py - compact, with intron
quine11.py - all these use 3 types of quote and no slashes
quine12.py - includes she-bang; clearly laid out.
quine13b.py - uses lambda; a one-line quine
X quine13a.py - educational example to clarify 13b.
SE.py - does this one count? In emacs, under C-cC-c, the output matches exactly!

Other people's
Short1.py
Short2.py
Short3.py
Short4.py
SomeQuine.py
SheBang.py
Intuitive.py
Neat.py
Obfusc.py
Natural Language (txt)

Here are some python programs to illustrate the idea that programs are maps.
grandfather.py
-> writer.py
-> fibo_iter.py

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