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# We can monkey-patch in a thread, but things don't work as expected. from __future__ import print_function import sys import threading from gevent import monkey import gevent.testing as greentest class Test(greentest.TestCase): @greentest.ignores_leakcheck # can't be run multiple times def test_patch_in_thread(self): all_warnings = [] try: get_ident = threading.get_ident except AttributeError: get_ident = threading._get_ident def process_warnings(warnings): all_warnings.extend(warnings) monkey._process_warnings = process_warnings current = threading.current_thread() current_id = get_ident() def target(): tcurrent = threading.current_thread() monkey.patch_all() tcurrent2 = threading.current_thread() self.assertIsNot(tcurrent, current) # We get a dummy thread now self.assertIsNot(tcurrent, tcurrent2) thread = threading.Thread(target=target) thread.start() try: thread.join() except: # pylint:disable=bare-except # XXX: This can raise LoopExit in some cases. greentest.reraiseFlakyTestRaceCondition() self.assertNotIsInstance(current, threading._DummyThread) self.assertIsInstance(current, monkey.get_original('threading', 'Thread')) # We generated some warnings if sys.version_info >= (3, 4): self.assertEqual(all_warnings, ['Monkey-patching outside the main native thread. Some APIs will not be ' 'available. Expect a KeyError to be printed at shutdown.', 'Monkey-patching not on the main thread; threading.main_thread().join() ' 'will hang from a greenlet']) else: self.assertEqual(all_warnings, ['Monkey-patching outside the main native thread. Some APIs will not be ' 'available. Expect a KeyError to be printed at shutdown.']) # Manual clean up so we don't get a KeyError del threading._active[current_id] threading._active[(getattr(threading, 'get_ident', None) or threading._get_ident)()] = current if __name__ == '__main__': greentest.main()