Decompile Python 2.7 .pyc
Question:
I’ve searched up and down, but can’t find a de-compiler that will work for Python 2.7 .pyc. Does anybody know of one that will work for Python 2.7? Thanks
Answers:
Ned Batchelder has posted a short script that will unmarshal a .pyc file and disassemble any code objects within, so you’ll be able to see the Python bytecode.
It looks like with newer versions of Python, you’ll need to comment out the lines that set modtime and print it (but don’t comment the line that sets moddate).
Turning that back into Python source would be somewhat more difficult, although theoretically possible. I assume all these programs that work for older versions of Python do that.
UPDATE (2019-04-22) – It sounds like you want to use uncompyle6 nowadays rather than the answers I had mentioned originally.
This sounds like it works: http://code.google.com/p/unpyc/
Issue 8 says it supports 2.7: http://code.google.com/p/unpyc/updates/list
UPDATE (2013-09-03) – As noted in the comments and in other answers, you should look at https://github.com/wibiti/uncompyle2 or https://github.com/gstarnberger/uncompyle instead of unpyc.
In case anyone is still struggling with this, as I was all morning today, I have found a solution that works for me:
Installation instructions:
git clone https://github.com/gstarnberger/uncompyle.git
cd uncompyle/
sudo ./setup.py install
Once the program is installed (note: it will be installed to your system-wide-accessible Python packages, so it should be in your $PATH), you can recover your Python files like so:
uncompyler.py thank_goodness_this_still_exists.pyc > recovered_file.py
The decompiler adds some noise mostly in the form of comments, however I’ve found it to be surprisingly clean and faithful to my original code. You will have to remove a little line of text beginning with +++ near the end of the recovered file to be able to run your code.
Decompyle++ (pycdc) appears to work for a range of python versions: https://github.com/zrax/pycdc
For example:
git clone https://github.com/zrax/pycdc
cd pycdc
make
./bin/pycdc Example.pyc > Example.py
Here is a great tool to decompile pyc files.
It was coded by me and supports python 1.0 – 3.3
Its based on uncompyle2 and decompyle++
I’ve searched up and down, but can’t find a de-compiler that will work for Python 2.7 .pyc. Does anybody know of one that will work for Python 2.7? Thanks
Ned Batchelder has posted a short script that will unmarshal a .pyc file and disassemble any code objects within, so you’ll be able to see the Python bytecode.
It looks like with newer versions of Python, you’ll need to comment out the lines that set modtime and print it (but don’t comment the line that sets moddate).
Turning that back into Python source would be somewhat more difficult, although theoretically possible. I assume all these programs that work for older versions of Python do that.
UPDATE (2019-04-22) – It sounds like you want to use uncompyle6 nowadays rather than the answers I had mentioned originally.
This sounds like it works: http://code.google.com/p/unpyc/
Issue 8 says it supports 2.7: http://code.google.com/p/unpyc/updates/list
UPDATE (2013-09-03) – As noted in the comments and in other answers, you should look at https://github.com/wibiti/uncompyle2 or https://github.com/gstarnberger/uncompyle instead of unpyc.
In case anyone is still struggling with this, as I was all morning today, I have found a solution that works for me:
Installation instructions:
git clone https://github.com/gstarnberger/uncompyle.git
cd uncompyle/
sudo ./setup.py install
Once the program is installed (note: it will be installed to your system-wide-accessible Python packages, so it should be in your $PATH), you can recover your Python files like so:
uncompyler.py thank_goodness_this_still_exists.pyc > recovered_file.py
The decompiler adds some noise mostly in the form of comments, however I’ve found it to be surprisingly clean and faithful to my original code. You will have to remove a little line of text beginning with +++ near the end of the recovered file to be able to run your code.
Decompyle++ (pycdc) appears to work for a range of python versions: https://github.com/zrax/pycdc
For example:
git clone https://github.com/zrax/pycdc
cd pycdc
make
./bin/pycdc Example.pyc > Example.py
Here is a great tool to decompile pyc files.
It was coded by me and supports python 1.0 – 3.3
Its based on uncompyle2 and decompyle++