Question

Say I am in the python interpreter and define a function as follows:

def h(a):
  return a

If I want to look at the bytecode (not a disassembly using dis), I can typically use h.func_code.co_code. Is there any other way to look at the bytecode?

For example, in the interpreter, if I just type h without making it a function call, I get the address of the function. Can I use that address to get the bytecode? Is there some other way?

Some additional info from the comments:

The app is written in python and packed using something like Py2App, cx_freeze, or py2exe. I played some tricks on the executable and now, when launched, the executable dumps me to a python command line. From there, I manually typed my function h into the interepeter.

Other attributes of h.func_code are present such as co_varnames, co_argcount, etc, but co_code is not.

If I type in h.func_code.co_code into the interpreter, I get 'code' object has no attribute 'co_code'.

UPDATE: From the comments again. As far as I can tell the opcodes have been remapped for the python interpreter that was shipped with the app.

Answer 1

If you have defined your own def h(): pass dummy function, and that function does not have a .func_code.co_code value, then most likely the included python interpreter is a custom compiled version where the co_code slot has been cleared.

The work-around is simple, copy the Contents/Resources zipfiles (in all subdirs) elsewhere, add those to your PYTHONPATH and import the code into your own interpreter.