scripts/python/module/setup.py.in: try to actually catch warnings (e.g. DeprecationWarning) to use correct form of open() [networkupstools#3256]

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

scripts/python/module/setup.py.in

@@ -10,6 +10,15 @@ import sys
 
 here = os.path.abspath(os.path.dirname(__file__))
 
+HAVE_WARNINGS = False
+try:
+    import warnings
+    warnings.filterwarnings("error")
+    HAVE_WARNINGS = True
+except Exception as x:
+    # sys.stderr.write("WARNING: failed to import warnings or configure them: %s" % str(x))
+    pass
+
 try:
     # NOTE: Deprecated as of python3.14
     import codecs
@@ -30,6 +39,9 @@ except Exception as x:
     HAVE_CODECS = False
     USE_CODECS = False
 
+if HAVE_WARNINGS:
+    warnings.resetwarnings()
+
 # README.txt appears from README.adoc during package or CI build
 if USE_CODECS:
     with codecs.open(os.path.join(here, "README.txt"), encoding="utf-8") as fh: