Huh, that’s convenient and really useful. When I do ridiculous import hacks, i usually just do it be importing a module, that trades the ast module to rewrite code, exec it and shim in an exit(). A preprocessor would be so much more ergonomic.

I used the ast rewriting stuff mostly before dicts were all ordered - replacing fist literals with an ordered dict call, which was actually useful.

I love how flexible python is. Most cursed thing I ever did was mutating strings in place, which led me eventually abusing mmap as well to write scripts that mutated themselves. Now I feel need to write lisp interpreter as a producer.