SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats

[sweettyler]

The error message comes from

File "/home/xxxx/mambaforge/lib/python3.10/site-packages/segyio/trace.py", line 290, in setitem
self.filehandle.puttr(self.wrapindex(i), xs)
SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats

The following is further explained in https://docs.python.org/3/c-api/arg.html#strings-and-buffers
"
Note For all # variants of formats (s#, y#, etc.), the macro PY_SSIZE_T_CLEAN must be defined before including Python.h. On Python 3.9 and older, the type of the length argument is Py_ssize_t if the PY_SSIZE_T_CLEAN macro is defined, or int otherwise.
"

[learnml2020]

I ran into the same problem when I tried to copy a.sgy to b.sgy use the line "dst.trace=src.trace"
the python version is 3.12.0
the segyio version 1.9.3

[ajmalkoti]

I ran into a similar problem with segyio ver. 1.9.3.
Reinstalling the segyio with the latest version (1.9.12) resolved the issue.