Metadata-Version: 1.1
Name: uncompyle6
Version: 2.16.0
Summary: Python cross-version byte-code decompiler
Home-page: https://github.com/rocky/python-uncompyle6/
Author: Rocky Bernstein, Hartmut Goebel, John Aycock, and others
Author-email: rb@dustyfeet.com
License: MIT
Description: |buildstatus|
        
        uncompyle6
        ==========
        
        A native Python cross-version decompiler and fragment decompiler.
        The successor to decompyle, uncompyle, and uncompyle2.
        
        
        Introduction
        ------------
        
        *uncompyle6* translates Python bytecode back into equivalent Python
        source code. It accepts bytecodes from Python version 1.5, and 2.1 to
        3.7 or so, including PyPy bytecode and Dropbox's Python 2.5 bytecode.
        
        Why this?
        ---------
        
        Ok, I'll say it: this software is amazing. It is more than your
        normal hacky decompiler. Using compiler_ technology, the program
        creates a parse tree of the program from the instructions; nodes at
        the upper levels that look a little like what might come from a Python
        AST. So we can really classify and understand what's going on in
        sections of Python bytecode.
        
        Building on this, another thing that makes this different from other
        CPython bytecode decompilers is the ability to deparse just
        *fragments* of source code and give source-code information around a
        given bytecode offset.
        
        I use the tree fragments to deparse fragments of code inside my
        trepan_ debuggers_. For that, bytecode offsets are recorded and
        associated with fragments of the source code. This purpose, although
        compatible with the original intention, is yet a little bit different.
        See this_ for more information.
        
        Python fragment deparsing given an instruction offset is useful in
        showing stack traces and can be encorporated into any program that
        wants to show a location in more detail than just a line number at
        runtime.  This code can be also used when source-code information does
        not exist and there is just bytecode. Again, my debuggers make use of
        this.
        
        There were (and still are) a number of decompyle, uncompyle,
        uncompyle2, uncompyle3 forks around. Almost all of them come basically
        from the same code base, and (almost?) all of them are no longer
        actively maintained. One was really good at decompiling Python 1.5-2.3
        or so, another really good at Python 2.7, but that only. Another
        handles Python 3.2 only; another patched that and handled only 3.3.
        You get the idea. This code pulls all of these forks together and
        *moves forward*. There is some serious refactoring and cleanup in this
        code base over those old forks.
        
        This project has the most complete support for Python 3.3 and above
        and the best all-around Python support.
        
        We are serious about testing, and use automated processes to find
        bugs. In the issue trackers for other decompilers, you will find a
        number of bugs we've found along the way. Very few to none of them are
        fixed in the other decompilers.
        
        Requirements
        ------------
        
        The code here can be run on Python versions 2.6 or later, PyPy 3-2.4,
        or PyPy-5.0.1.  Python versions 2.4-2.7 are supported in the
        python-2.4 branch.  The bytecode files it can read have been tested on
        Python bytecodes from versions 1.5, 2.1-2.7, and 3.0-3.6 and the
        above-mentioned PyPy versions.
        
        Installation
        ------------
        
        This uses setup.py, so it follows the standard Python routine:
        
        ::
        
            pip install -e .  # set up to run from source tree
                              # Or if you want to install instead
            python setup.py install # may need sudo
        
        A GNU makefile is also provided so :code:`make install` (possibly as root or
        sudo) will do the steps above.
        
        Testing
        -------
        
        ::
        
           make check
        
        A GNU makefile has been added to smooth over setting running the right
        command, and running tests from fastest to slowest.
        
        If you have remake_ installed, you can see the list of all tasks
        including tests via :code:`remake --tasks`
        
        
        Usage
        -----
        
        Run
        
        ::
        
        $ uncompyle6 *compiled-python-file-pyc-or-pyo*
        
        For usage help:
        
        ::
        
           $ uncompyle6 -h
        
        If you want strong verification of the correctness of the
        decompilation process, add the `--verify` option. But there are
        situations where this will indicate a failure, although the generated
        program is semantically equivalent. Using option `--weak-verify` will
        tell you if there is something definitely wrong. Generally, large
        swaths of code are decompiled correctly, if not the entire program.
        
        You can also cross compare the results with pycdc_ . Since they work
        differently, bugs here often aren't in that, and vice versa.
        
        
        Known Bugs/Restrictions
        -----------------------
        
        The biggest known and possibly fixable (but hard) problem has to do
        with handling control flow. (Python has probably the most diverse and
        screwy set of compound statements I've ever seen; there
        are "else" clauses on loops and try blocks that I suspect many
        programmers don't know about.)
        
        All of the Python decompilers that I have looked at have problems
        decompiling Python's control flow. In some cases we can detect an
        erroneous decompilation and report that.
        
        *Verification* is the process of decompiling bytecode, compiling with
        a Python for that bytecode version, and then comparing the bytecode
        produced by the decompiled/compiled program. Some allowance is made
        for inessential differences. But other semantically equivalent
        differences are not caught. For example ``1 and 0`` is decompiled to
        the equivalent ``0``; remnants of the first true evaluation (1) is
        lost when Python compiles this. When Python next compiles ``0`` the
        resulting code is simpler.
        
        *Weak Verification*
        on the other hand doesn't check bytecode for equivalence but does
        check to see if the resulting decompiled source is a valid Python
        program by running the Python interpreter. Because the Python language
        has changed so much, for best results you should use the same Python
        Version in checking as used in the bytecode.
        
        Finally, we have automated running the standard Python tests after
        first compiling and decompiling the test program. Results here are a
        bit weak (if not better than most other Python decompilers). But over
        time this will probably get better.
        
        Python support is strongest in Python 2 for 2.7 and drops off as you
        get further away from that. Support is also probably pretty good for
        python 2.3-2.4 since a lot of the goodness of early the version of the
        decompiler from that era has been preserved (and Python compilation in
        that era was minimal)
        
        There is some work to do on the lower end Python versions which is
        more difficult for us to handle since we don't have a Python
        interpreter for versions 1.5, 1.6, and 2.0.
        
        In the Python 3 series, Python support is is strongest around 3.4 or
        3.3 and drops off as you move further away from those versions. Python
        3.6 changes things drastically by using word codes rather than byte
        codes. As a result, the jump offset field in a jump instruction
        argument has been reduced. This makes the `EXTENDED_ARG` instructions
        are now more prevalent in jump instruction; previously they had been
        rare.  Perhaps to compensate for the additional `EXTENDED_ARG`
        instructions, additional jump optimization has been added. So in sum
        handling control flow by ad hoc means as is currently done is worse.
        
        Also, between Python 3.5, 3.6 and 3.7 there have been major changes to the
        `MAKE_FUNCTION` and `CALL_FUNCTION` instructions.
        
        Currently not all Python magic numbers are supported. Specifically in
        some versions of Python, notably Python 3.6, the magic number has
        changes several times within a version. We support only the released
        magic. There are also customized Python interpreters, notably Dropbox,
        which use their own magic and encrypt bytcode. With the exception of
        the Dropbox's old Python 2.5 interpreter this kind of thing is not
        handled.
        
        We also don't handle PJOrion_ obfuscated code. For that try: PJOrion
        Deobfuscator_ to unscramble the bytecode to get valid bytecode before
        trying this tool. This program can't decompile Microsoft Windows EXE
        files created by Py2EXE_, although we can probably decompile the code
        after you extract the bytecode properly. For situations like this, you
        might want to consider a decompilation service like `Crazy Compilers
        <http://www.crazy-compilers.com/decompyle/>`_.  Handling
        pathologically long lists of expressions or statements is slow.
        
        
        There is lots to do, so please dig in and help.
        
        See Also
        --------
        
        * https://github.com/zrax/pycdc : supports all versions of Python and is written in C++. Support for later Python 3 versions is a bit lacking though.
        * https://code.google.com/archive/p/unpyc3/ : supports Python 3.2 only. The above projects use a different decompiling technique than what is used here.
        * https://github.com/figment/unpyc3/ : fork of above, but supports Python 3.3 only. Includes some fixes like supporting function annotations
        * The HISTORY_ file.
        * `How to report a bug <https://github.com/rocky/python-uncompyle6/blob/master/HOW-TO-REPORT-A-BUG.md>`_
        * https://github.com/rocky/python-xdis : Cross Python version disassembler
        * https://github.com/rocky/python-xasm : Cross Python version assembler
        * https://github.com/rocky/python-uncompyle6/wiki : Wiki Documents which describe the code and aspects of it in more detail
        
        
        .. _trepan: https://pypi.python.org/pypi/trepan2
        .. _compiler: https://pypi.python.org/pypi/spark_parser
        .. _HISTORY: https://github.com/rocky/python-uncompyle6/blob/master/HISTORY.md
        .. _debuggers: https://pypi.python.org/pypi/trepan3k
        .. _remake: https://bashdb.sf.net/remake
        .. _pycdc: https://github.com/zrax/pycdc
        .. _this: https://github.com/rocky/python-uncompyle6/wiki/Deparsing-technology-and-its-use-in-exact-location-reporting
        .. |buildstatus| image:: https://travis-ci.org/rocky/python-uncompyle6.svg
        		 :target: https://travis-ci.org/rocky/python-uncompyle6
        .. _PJOrion: http://www.koreanrandom.com/forum/topic/15280-pjorion-%D1%80%D0%B5%D0%B4%D0%B0%D0%BA%D1%82%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5-%D0%BA%D0%BE%D0%BC%D0%BF%D0%B8%D0%BB%D1%8F%D1%86%D0%B8%D1%8F-%D0%B4%D0%B5%D0%BA%D0%BE%D0%BC%D0%BF%D0%B8%D0%BB%D1%8F%D1%86%D0%B8%D1%8F-%D0%BE%D0%B1%D1%84
        .. _Deobfuscator: https://github.com/extremecoders-re/PjOrion-Deobfuscator
        .. _Py2EXE: https://en.wikipedia.org/wiki/Py2exe
        
        
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.4
Classifier: Programming Language :: Python :: 2.5
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3.1
Classifier: Programming Language :: Python :: 3.2
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Debuggers
Classifier: Topic :: Software Development :: Libraries :: Python Modules
