Underscore

Obfuscating code by changing the variable names to underscores

Example

Input

# fib.py

from operator import add

class Fibber(object):

    @staticmethod
    def fib(n):
        a, b = 0, 1
        for i in xrange(n):
            a, b = b, add(a, b)
        return b

print Fibber.fib(10)

Output

# _fib.py

(___________, ____________, _____________) = (0, 1, 10)
(________, _________, __________) = (object, xrange, staticmethod)
from operator import add as _


class __(________):

    @__________
    def ___(____):
        (_____, ______) = (___________, ____________)
        for _______ in _________(____):
            (_____, ______) = (______, _(_____, ______))
        return ______
    (fib,) = (___,)
print __.fib(_____________)
(Fibber, add) = (__, _)

Installation

pip install underscore

Support for python2.6 and python2.7

Usage

Usage: _ [options] src [dest]

Options:
  -h, --help      show this help message and exit
  -o, --original  write out the original file as a comment to the compiled
                  code
  -v, --verbose

You can also compile through python

from underscore import _

_(filename, output_filename)

Development

Setup

python setup.py develop

Running Tests

make test

Tests

• tests/compile_test.py
  • This test makes sure that all argument combinations for the comandline tool works properly
• tests/diff_test.py
  • This test compiles python files in example/ into example/underscored then runs both version to check that their outputs are equivalent.
• tests/meta_test.py (Not ready yet)
  • This test will turn the source code into underscored code, then with the underscored code we will turn the source code into underscored code again.. and check that the source and output are the same.. I know mind blowing..

TODO

• Give out warnings if users are using exec as this may lead to incorrect behavior.
• Write the meta_test.py described above.
• Module doc-string to work