Python threading._Event() Examples

The following are 18 code examples for showing how to use threading._Event(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

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Example 1
Project: vnpy_crypto   Author: birforce   File: tracker.py    License: MIT License 6 votes vote down vote up
def __init__(self, *towatch):
        """MessageTracker(*towatch)

        Create a message tracker to track a set of mesages.

        Parameters
        ----------
        *towatch : tuple of Event, MessageTracker, Message instances.
            This list of objects to track. This class can track the low-level
            Events used by the Message class, other MessageTrackers or 
            actual Messages.
        """
        self.events = set()
        self.peers = set()
        for obj in towatch:
            if isinstance(obj, Event):
                self.events.add(obj)
            elif isinstance(obj, MessageTracker):
                self.peers.add(obj)
            elif isinstance(obj, Frame):
                if not obj.tracker:
                    raise ValueError("Not a tracked message")
                self.peers.add(obj.tracker)
            else:
                raise TypeError("Require Events or Message Frames, not %s"%type(obj)) 
Example 2
Project: Computable   Author: ktraunmueller   File: tracker.py    License: MIT License 6 votes vote down vote up
def __init__(self, *towatch):
        """MessageTracker(*towatch)

        Create a message tracker to track a set of mesages.

        Parameters
        ----------
        *towatch : tuple of Event, MessageTracker, Message instances.
            This list of objects to track. This class can track the low-level
            Events used by the Message class, other MessageTrackers or 
            actual Messages.
        """
        self.events = set()
        self.peers = set()
        for obj in towatch:
            if isinstance(obj, Event):
                self.events.add(obj)
            elif isinstance(obj, MessageTracker):
                self.peers.add(obj)
            elif isinstance(obj, Frame):
                if not obj.tracker:
                    raise ValueError("Not a tracked message")
                self.peers.add(obj.tracker)
            else:
                raise TypeError("Require Events or Message Frames, not %s"%type(obj)) 
Example 3
Project: pySINDy   Author: luckystarufo   File: tracker.py    License: MIT License 6 votes vote down vote up
def __init__(self, *towatch):
        """MessageTracker(*towatch)

        Create a message tracker to track a set of mesages.

        Parameters
        ----------
        *towatch : tuple of Event, MessageTracker, Message instances.
            This list of objects to track. This class can track the low-level
            Events used by the Message class, other MessageTrackers or 
            actual Messages.
        """
        self.events = set()
        self.peers = set()
        for obj in towatch:
            if isinstance(obj, Event):
                self.events.add(obj)
            elif isinstance(obj, MessageTracker):
                self.peers.add(obj)
            elif isinstance(obj, Frame):
                if not obj.tracker:
                    raise ValueError("Not a tracked message")
                self.peers.add(obj.tracker)
            else:
                raise TypeError("Require Events or Message Frames, not %s"%type(obj)) 
Example 4
Project: Carnets   Author: holzschu   File: tracker.py    License: BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up
def __init__(self, *towatch):
        """MessageTracker(*towatch)

        Create a message tracker to track a set of mesages.

        Parameters
        ----------
        *towatch : tuple of Event, MessageTracker, Message instances.
            This list of objects to track. This class can track the low-level
            Events used by the Message class, other MessageTrackers or 
            actual Messages.
        """
        self.events = set()
        self.peers = set()
        for obj in towatch:
            if isinstance(obj, Event):
                self.events.add(obj)
            elif isinstance(obj, MessageTracker):
                self.peers.add(obj)
            elif isinstance(obj, Frame):
                if not obj.tracker:
                    raise ValueError("Not a tracked message")
                self.peers.add(obj.tracker)
            else:
                raise TypeError("Require Events or Message Frames, not %s"%type(obj)) 
Example 5
Project: oslo.utils   Author: openstack   File: test_eventletutils.py    License: Apache License 2.0 6 votes vote down vote up
def test_event_api_compat(self, mock_eventlet):
        with mock.patch('oslo_utils.eventletutils.is_monkey_patched',
                        return_value=True):
            e_event = eventletutils.Event()
        self.assertIsInstance(e_event, eventletutils.EventletEvent)

        t_event = eventletutils.Event()
        if six.PY3:
            t_event_cls = threading.Event
        else:
            t_event_cls = threading._Event
        self.assertIsInstance(t_event, t_event_cls)

        public_methods = [m for m in dir(t_event) if not m.startswith("_") and
                          callable(getattr(t_event, m))]

        for method in public_methods:
            self.assertTrue(hasattr(e_event, method))

        # Ensure set() allows multiple invocations, same as in
        # threading implementation.
        e_event.set()
        self.assertTrue(e_event.isSet())
        e_event.set()
        self.assertTrue(e_event.isSet()) 
Example 6
Project: ironpython2   Author: IronLanguages   File: test_multiprocessing.py    License: Apache License 2.0 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 7
Project: OpenMTC   Author: OpenMTC   File: __init__.py    License: Eclipse Public License 1.0 5 votes vote down vote up
def wait(self, timeout = None):
            super(_Event, self).wait(timeout = timeout)
            return self.is_set() 
Example 8
Project: BinderFilter   Author: dxwu   File: test_multiprocessing.py    License: MIT License 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 9
Project: oss-ftp   Author: aliyun   File: test_multiprocessing.py    License: MIT License 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 10
Project: gcblue   Author: gcblue   File: test_multiprocessing.py    License: BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 11
Project: CTFCrackTools-V2   Author: Acmesec   File: test_multiprocessing.py    License: GNU General Public License v3.0 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 12
Project: moviegrabber   Author: binhex   File: caching.py    License: GNU General Public License v3.0 5 votes vote down vote up
def __setitem__(self, key, value):
        """Set the cached value for the given key."""
        existing = self.get(key)
        dict.__setitem__(self, key, value)
        if isinstance(existing, threading._Event):
            # Set Event.result so other threads waiting on it have
            # immediate access without needing to poll the cache again.
            existing.result = value
            existing.set() 
Example 13
Project: mecode   Author: jminardi   File: test_printer.py    License: MIT License 5 votes vote down vote up
def test_ok_received(self):
        self.assertIsInstance(self.p._ok_received, Event)
        self.assertTrue(self.p._ok_received.is_set()) 
Example 14
Project: CTFCrackTools   Author: Acmesec   File: test_multiprocessing.py    License: GNU General Public License v3.0 5 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
#
# 
Example 15
Project: Fluid-Designer   Author: Microvellum   File: _test_multiprocessing.py    License: GNU General Public License v3.0 4 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
# Tests for Barrier - adapted from tests in test/lock_tests.py
#

# Many of the tests for threading.Barrier use a list as an atomic
# counter: a value is appended to increment the counter, and the
# length of the list gives the value.  We use the class DummyList
# for the same purpose. 
Example 16
Project: ironpython3   Author: IronLanguages   File: _test_multiprocessing.py    License: Apache License 2.0 4 votes vote down vote up
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
# Tests for Barrier - adapted from tests in test/lock_tests.py
#

# Many of the tests for threading.Barrier use a list as an atomic
# counter: a value is appended to increment the counter, and the
# length of the list gives the value.  We use the class DummyList
# for the same purpose. 
Example 17
def test_event(self):
        event = self.Event()
        wait = TimingWrapper(event.wait)

        # Removed temporarily, due to API shear, this does not
        # work with threading._Event objects. is_set == isSet
        self.assertEqual(event.is_set(), False)

        # Removed, threading.Event.wait() will return the value of the __flag
        # instead of None. API Shear with the semaphore backed mp.Event
        self.assertEqual(wait(0.0), False)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), False)
        self.assertTimingAlmostEqual(wait.elapsed, TIMEOUT1)

        event.set()

        # See note above on the API differences
        self.assertEqual(event.is_set(), True)
        self.assertEqual(wait(), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        self.assertEqual(wait(TIMEOUT1), True)
        self.assertTimingAlmostEqual(wait.elapsed, 0.0)
        # self.assertEqual(event.is_set(), True)

        event.clear()

        #self.assertEqual(event.is_set(), False)

        p = self.Process(target=self._test_event, args=(event,))
        p.daemon = True
        p.start()
        self.assertEqual(wait(), True)

#
# Tests for Barrier - adapted from tests in test/lock_tests.py
#

# Many of the tests for threading.Barrier use a list as an atomic
# counter: a value is appended to increment the counter, and the
# length of the list gives the value.  We use the class DummyList
# for the same purpose. 
Example 18
Project: moviegrabber   Author: binhex   File: caching.py    License: GNU General Public License v3.0 4 votes vote down vote up
def wait(self, key, timeout=5, debug=False):
        """Return the cached value for the given key, or None.
        
        If timeout is not None, and the value is already
        being calculated by another thread, wait until the given timeout has
        elapsed. If the value is available before the timeout expires, it is
        returned. If not, None is returned, and a sentinel placed in the cache
        to signal other threads to wait.
        
        If timeout is None, no waiting is performed nor sentinels used.
        """
        value = self.get(key)
        if isinstance(value, threading._Event):
            if timeout is None:
                # Ignore the other thread and recalc it ourselves.
                if debug:
                    cherrypy.log('No timeout', 'TOOLS.CACHING')
                return None
            
            # Wait until it's done or times out.
            if debug:
                cherrypy.log('Waiting up to %s seconds' % timeout, 'TOOLS.CACHING')
            value.wait(timeout)
            if value.result is not None:
                # The other thread finished its calculation. Use it.
                if debug:
                    cherrypy.log('Result!', 'TOOLS.CACHING')
                return value.result
            # Timed out. Stick an Event in the slot so other threads wait
            # on this one to finish calculating the value.
            if debug:
                cherrypy.log('Timed out', 'TOOLS.CACHING')
            e = threading.Event()
            e.result = None
            dict.__setitem__(self, key, e)
            
            return None
        elif value is None:
            # Stick an Event in the slot so other threads wait
            # on this one to finish calculating the value.
            if debug:
                cherrypy.log('Timed out', 'TOOLS.CACHING')
            e = threading.Event()
            e.result = None
            dict.__setitem__(self, key, e)
        return value