On Thu, Dec 17, 2020 at 7:27 AM MRAB <pyt...@mrabarnett.plus.com> wrote: > > 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.
Yes, that's a possibility. A hack, but a definite hack. But this is one of the places where the universality of stdin/stdout is extremely handy. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
