Chances are, you have probably heard what a quine is. In case you haven't, it's a program that prints its own source code, and it's quite enlightening to have a go at writing it on your own. (In case you'd like to see one, check out quine_simple.py in this repository.)
What you might not know, that in any Turing-complete programming language and any one-argument function f in that language, it's possible to produce a program P that acts exactly as f on P's source code. This repository is an implementation of such a program tranformation for Python 3, implemented in make_quine.py. The implementation expects the source file to be a valid Python 3 program having a function f of one argument, and will produce a program P running f on P's source. In this case, a regular quine can be implemented by invoking make_quine.py on the following simple program:
def f(x):
print(x, end='')Since function.py with the exact same source as above is provided in the repository, you can test that it works by running
python3 make_quine.py < function.py > gen_quine.py
diff gen_quine.py <(python3 gen_quine.py)