Python 3 drops the PRINT_ITEM instruction.Īnyone writing such a tool will have to come to grips with that or be happy with living in a single version of Python, for which 2.7 is probably the most popular choice. However the example in one of the comments from the Flare_bytecode_graph with its POP_TOP_IF_FALSE is 2.7. The bytecode in the example graph with its JUMP_IF_FALSE followed by some POP_TOPs and PRINT_NEWLINE instruction, reflect Python before 2.7. The Manyard framework, which is dedicated to Python3Ī challenge in writing a tool to extract the control flow of python bytecode is that there are so many Python bytecodes versions to choose from, about 25 or so by now (if you include pypy variants). While other projects have achieved this with varied success, Decompyle++ is unique in that it seeks to support byte-code from any version of Python.ĭecompyle++ includes both a byte-code disassembler (pycdas) and a decompiler (pycdc). Pycdc, which works better than uncompyle, and is simpler to use than pyReticĭecompyle++ aims to translate compiled Python byte-code back into valid and human-readable Python source code. It assists a reverse engineer in gaining sourcecode (.py's) back from bytecode (.pyc's), in particular it assists when the code that is being reversed has put some effort into trying to stop decompilation using standard toolsets. PyREtic is an extensible framework to assist in performing various reverse engineering tasks for Python language projects. PyREtic, that is more a powerful framework than a simple program 'uncompyle' is based on John Aycock's generic small languages compiler 'uncompyle' may also verify the equivalence of the generated source byīy compiling it and comparing both byte-codes. The generated source is very readable: docstrings, lists, tuples and hashes get pretty-printed. It accepts byte-code from Python version 2.7 only. 'uncompyle' converts Python byte-code back into equivalent Python There are several tools dedicated to Python's bytecode reversing:
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