This module decompiles Python bytecodes to the source code.
This is a preliminary release - look at the code at the bottom
of the source to see how it works.
The code can decompile Python 1.5.2 or
2.0 bytecodes, optimized or not, and returns a dictionary mapping
line numbers to lines.
There's a number of known problems, and probably quite a lot of
The known problems include:
- it does not put global statements in the code.
- chained assignment does not work (e.g. "a = b = 1"). It gets
decompiled to "a = 1; b = 1" which is sometimes OK, and sometimes not
(if the RHS has side effects).
- tuple arguments in function definitions (e.g. "def f(a, (b, c))") get
decompiled to equivalent
code that uses an invalid identifier. Fixing this by hand should be fairly
- List comprehensions don't work. This would be really difficult to
get right, but it may be possible (the code handles assert, which is kind of
tricky in the same way).
- The import statement "import spam.ham", valid in 2.0, gets decompiled
incorrectly as "import spam.ham as spam"
- The new "print >> file ..." expression will evaluate "file" once for
every item in the argument list.
The code is licensed under the MIT licence, basically allowing you
to do almost anything with the code.
The source code: decompile.py
Last Updated: 21 January 2005