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Re: Obfuscated Python hack

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Tim Chase wrote:
> Stripping off the exec() call makes it pretty transparent that you're
> attempting (successfully on some platforms) to set the value of "4"
> to "5".

But you have to do that in *another* Python session, because
the first one is broken in interesing ways, e.g.

 >>> (lambda *fs: reduce(lambda f, g: lambda x: f(g(x)), fs))(*([lambda s: 
s[1::2]+s[-2::-2]]*54))('motcye;cye._n8fo_drs(d4+)vle=5  ua.8)(isedamr.ticspt 
spt rpi')
   File "<stdin>", line 1
SyntaxError: name 'fs' is local and global

 >>> lambda z: 42
   File "<stdin>", line 1
SyntaxError: name 'z' is local and global

I never knew that error message existed! Is it even possible
to get it from a non-broken Python?

To answer my own question, apparently yes:

 >>> def f(x):
...  global x
...
   File "<stdin>", line 1
SyntaxError: name 'x' is local and global

You learn something every day...

-- 
Greg

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Thread

Obfuscated Python hack Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-02 12:11 +0000
  Re: Obfuscated Python hack Tim Chase <python.list@tim.thechases.com> - 2014-06-02 07:27 -0500
    Re: Obfuscated Python hack Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-06-03 17:40 +1200
  Re: Obfuscated Python hack Chris Angelico <rosuav@gmail.com> - 2014-06-02 23:23 +1000
    Re: Obfuscated Python hack Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-02 15:38 +0000
      Re: Obfuscated Python hack Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-02 09:47 -0600
      Re: Obfuscated Python hack Chris Angelico <rosuav@gmail.com> - 2014-06-03 01:55 +1000
      Re: Obfuscated Python hack Chris Angelico <rosuav@gmail.com> - 2014-06-03 01:56 +1000

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