test_warnings.py 文件源码

def test_envvar_and_command_line(self):
        newenv = os.environ.copy()
        newenv["PYTHONWARNINGS"] = "ignore::DeprecationWarning"
        p = subprocess.Popen([sys.executable, "-W" "ignore::UnicodeWarning",
                "-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
                stdout=subprocess.PIPE, env=newenv)
        self.assertEqual(p.communicate()[0],
                "['ignore::UnicodeWarning', 'ignore::DeprecationWarning']")
        self.assertEqual(p.wait(), 0)