[BUG] threading.Thread.setDaemon has been deprecated in favor of setting daemon attribute directly in Python 3.10

[tirkarthi]

setuptools version

master branch

Python version

Python 3.10

OS

Linux

Additional environment information

No response

Description

threading.setDaemon has been deprecated in favor of setting daemon attribute directly in Python 3.10 . Ref : python/cpython#25174

Expected behavior

Set daemon attribute directly.

How to Reproduce

1. Run PYTHONWARNINGS=always python -m pytest setuptools/tests/test_easy_install.py -k test_setup_requires_honors_fetch_params with python from master branch.

Output

PYTHONWARNINGS=always python -m pytest setuptools/tests/test_easy_install.py -k test_setup_requires_honors_fetch_params
/root/py310-dev-venv/lib/python3.10/site-packages/pytest_virtualenv.py:5: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils import sysconfig
/root/py310-dev-venv/lib/python3.10/site-packages/pytest_shutil/workspace.py:23: PytestDeprecationWarning: @pytest.yield_fixture is deprecated.
Use @pytest.fixture instead; they are the same.
  @pytest.yield_fixture()
/root/py310-dev-venv/lib/python3.10/site-packages/pytest_shutil/run.py:6: DeprecationWarning: the imp module is deprecated in favour of importlib and slated for removal in Python 3.12; see the module's documentation for alternative uses
  import imp
/root/py310-dev-venv/lib/python3.10/site-packages/pytest_virtualenv.py:31: PytestDeprecationWarning: @pytest.yield_fixture is deprecated.
Use @pytest.fixture instead; they are the same.
  @yield_fixture(scope='function')
========================================================================= test session starts ==========================================================================
platform linux -- Python 3.10.0a7+, pytest-6.3.0.dev369+g9078c3ce2, py-1.10.0, pluggy-0.13.1
rootdir: /root/checked_repos_clone/setuptools, configfile: pytest.ini
plugins: flake8-1.0.7, virtualenv-1.7.0, shutil-1.7.0, cov-2.11.1
collected 48 items / 47 deselected / 1 selected                                                                                                                        

setuptools/tests/test_easy_install.py E                                                                                                                          [100%]

================================================================================ ERRORS ================================================================================
_____________________________________________ ERROR at setup of TestSetupRequires.test_setup_requires_honors_fetch_params ______________________________________________

/root/cpython/Lib/sre_parse.py:529: ResourceWarning: unclosed <socket.socket fd=11, family=AF_INET, type=SOCK_STREAM, proto=0, laddr=('0.0.0.0', 33357)>
  subpatternappend((LITERAL, _ord(this)))
ResourceWarning: Enable tracemalloc to get the object allocation traceback
    @pytest.fixture
    def mock_index():
        # set up a server which will simulate an alternate package index.
>       p_index = MockServer()

setuptools/tests/test_easy_install.py:434: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
setuptools/tests/server.py:68: in __init__
    self.setDaemon(True)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <MockServer(Thread-1, initial)>, daemonic = True

    def setDaemon(self, daemonic):
        """Set whether this thread is a daemon.
    
        This method is deprecated, use the .daemon property instead.
    
        """
        import warnings
>       warnings.warn('setDaemon() is deprecated, set the daemon attribute instead',
                      DeprecationWarning, stacklevel=2)
E       DeprecationWarning: setDaemon() is deprecated, set the daemon attribute instead

/root/cpython/Lib/threading.py:1184: DeprecationWarning
=================================================================== 47 deselected, 1 error in 0.52s ===================================================================

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