bpo-32088: Display Deprecation in debug mode (#4474)
When Python is build is debug mode (Py_DEBUG), DeprecationWarning,
PendingDeprecationWarning and ImportWarning warnings are now
displayed by default.
test_venv: run "-m pip" and "-m ensurepip._uninstall" with -W
ignore::DeprecationWarning since pip code is not part of Python.
diff --git a/Lib/warnings.py b/Lib/warnings.py
index a1f7746..48d5e16 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -508,10 +508,13 @@
# Module initialization
_processoptions(sys.warnoptions)
if not _warnings_defaults:
- silence = [ImportWarning, PendingDeprecationWarning]
- silence.append(DeprecationWarning)
- for cls in silence:
- simplefilter("ignore", category=cls)
+ py_debug = hasattr(sys, 'gettotalrefcount')
+ if not py_debug:
+ silence = [ImportWarning, PendingDeprecationWarning]
+ silence.append(DeprecationWarning)
+ for cls in silence:
+ simplefilter("ignore", category=cls)
+
bytes_warning = sys.flags.bytes_warning
if bytes_warning > 1:
bytes_action = "error"
@@ -520,8 +523,9 @@
else:
bytes_action = "ignore"
simplefilter(bytes_action, category=BytesWarning, append=1)
+
# resource usage warnings are enabled by default in pydebug mode
- if hasattr(sys, 'gettotalrefcount'):
+ if py_debug:
resource_action = "always"
else:
resource_action = "ignore"