Hi, I'm trying to set binary tag using Python 3.12 and os.set_tagging , and looks like it's not working:

$ ls -T /u/user/tmp/BINARY.txt
- untagged    T=off /u/user/tmp/BINARY.txt

$ python -c "import os; print(os.set_tagging('/u/user/tmp/BINARY.txt', 65535))"
-1

$ ls -T /u/user/tmp/BINARY.txt
- untagged    T=off /u/user/tmp/BINARY.txt

but it's ok for iso-8859-1 and ebcdic ccsid:

$ python -c "import os; print(os.set_tagging('/u/user/tmp/BINARY.txt', 819))"
0
$ ls -T /u/user/tmp/BINARY.txt
t ISO8859-1   T=on  /u/user/tmp/BINARY.txt
$ python -c "import os; print(os.set_tagging('/u/user/tmp/BINARY.txt', 1047))"
0

$ ls -T /u/user/tmp/BINARY.txt
t IBM-1047    T=on  /u/user/tmp/BINARY.txt

Thanks,

Alexander

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Alexander Klochkov
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Hi Alexander, thanks for reporting this, we'll be investigating it. As a workaround, I'd recommend you use the zos_util package. You can obtain it in two ways:

1) Directly from the Python AI Toolkit for IBM z/OS
2) Install it from PyPI - you'll need a C compiler installed in your environment to build this package, and you may also find the following blog useful for Installing Packages with C Components on Python 3.12.

To use the package for your scenario, you can do the following:

import zos_util
zos_util.tag_binary('BINARY.TXT')

And you can find the documentation for this package here