On 2020-12-16 19:16, Chris Angelico wrote:
On Thu, Dec 17, 2020 at 6:06 AM Chris Green <c...@isbd.net> wrote:
Some time ago (in July) I asked some questions here
about problems migrating some code from Python 2 to Python 3.
The specific problem that finally prevented me from managing to get it
to work was a (Linux) .so file that had been built for Python 2 and,
as I don't have the source, I can't build for Python 3.
I need to have another go at fixing this as otherwise the code that I
need to manage my printer will stop working as I update my Ubuntu
systems.
The specific error I'm getting is as follows:-
File "/usr/libexec/okimfputl.new/guicom.py", line 66, in <module> import
pyscand
ImportError: /usr/libexec/okimfpdrv/pyscand.so: undefined symbol:
_Py_ZeroStruct
I know this is because the extension module is compiled for Python 2
and _Py_ZeroStruct is only available in Python 2. I don't have the C
code for the module.
Is there *any* other way around this, like a 'compatibility module' to
use Python 2 .so files in Python 3 or anything like it? I have all
the Python code and have (up to hitting this problem) converted it to
Python 3.
Basically no. The error you're seeing is a nice noisy one, but even if
you got past that, there'll be a LOT of incompatibilities.
Unfortunately, a quick google search for 'pyscand' showed up....
places where you've asked this question, suggesting that nobody else
uses this library. It looks like you're going to have to take a big
step back and figure out what the library is doing for you, and
reimplement that somehow. :(
Good luck.
Alternatively, run something in Python 2.7 that can import it and talk
to the main Python 3 code, at least until you have a long-term solution.
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