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bpo-32089: Use default action for ResourceWarning (#4584)

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In development and debug mode, use the "default" action, rather than
the "always" action, for ResourceWarning in the default warnings
filters.
This commit is contained in:
Victor Stinner 2017-11-27 12:11:55 +01:00 • committed by GitHub
parent c172fc5031
commit 21c7730761
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 10 additions and 21 deletions
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21
Lib/test/test_cmd_line.py
View file

@ -532,26 +532,26 @@ def test_xdev(self):
out = self.run_xdev("-c", code)
self.assertEqual(out,
"ignore::BytesWarning "
"always::ResourceWarning "
"default::ResourceWarning "
"default::Warning")
out = self.run_xdev("-b", "-c", code)
self.assertEqual(out,
"default::BytesWarning "
"always::ResourceWarning "
"default::ResourceWarning "
"default::Warning")
out = self.run_xdev("-bb", "-c", code)
self.assertEqual(out,
"error::BytesWarning "
"always::ResourceWarning "
"default::ResourceWarning "
"default::Warning")
out = self.run_xdev("-Werror", "-c", code)
self.assertEqual(out,
"error::Warning "
"ignore::BytesWarning "
"always::ResourceWarning "
"default::ResourceWarning "
"default::Warning")
try:
@ -573,19 +573,6 @@ def test_xdev(self):
out = self.run_xdev("-c", code)
self.assertEqual(out, "True")
# Make sure that ResourceWarning emitted twice at the same line number
# is logged twice
filename = support.TESTFN
self.addCleanup(support.unlink, filename)
with open(filename, "w", encoding="utf8") as fp:
print("def func(): open(__file__)", file=fp)
print("func()", file=fp)
print("func()", file=fp)
fp.flush()
out = self.run_xdev(filename)
self.assertEqual(out.count(':1: ResourceWarning: '), 2, out)
class IgnoreEnvironmentTest(unittest.TestCase):

2
Lib/warnings.py
View file

@ -540,7 +540,7 @@ def _filters_mutated():
# resource usage warnings are enabled by default in pydebug mode
if dev_mode or py_debug:
resource_action = "always"
resource_action = "default"
else:
resource_action = "ignore"
simplefilter(resource_action, category=ResourceWarning, append=1)

3
Misc/NEWS.d/next/Library/2017-11-27-11-29-34.bpo-32089.6ydDYv.rst Normal file
View file

@ -0,0 +1,3 @@
warnings: In development (-X dev) and debug mode (pydebug build), use the
"default" action for ResourceWarning, rather than the "always" action, in
the default warnings filters.

5
Python/_warnings.c
View file

@ -13,7 +13,6 @@ _Py_IDENTIFIER(argv);
_Py_IDENTIFIER(stderr);
_Py_IDENTIFIER(ignore);
_Py_IDENTIFIER(error);
_Py_IDENTIFIER(always);
_Py_static_string(PyId_default, "default");
static int
@ -1208,9 +1207,9 @@ init_filters(const _PyCoreConfig *config)
_Py_Identifier *resource_action;
/* resource usage warnings are enabled by default in pydebug mode */
#ifdef Py_DEBUG
resource_action = &PyId_always;
resource_action = &PyId_default;
#else
resource_action = (dev_mode ? &PyId_always : &PyId_ignore);
resource_action = (dev_mode ? &PyId_default: &PyId_ignore);
#endif
PyList_SET_ITEM(filters, pos++, create_filter(PyExc_ResourceWarning,
resource_action));