Python tornado.gen 模块，BadYieldError() 实例源码

def _run_callback(self, callback):
        """Runs a callback with error handling.

        For use in subclasses.
        """
        try:
            ret = callback()
            if ret is not None:
                from tornado import gen
                # Functions that return Futures typically swallow all
                # exceptions and store them in the Future.  If a Future
                # makes it out to the IOLoop, ensure its exception (if any)
                # gets logged too.
                try:
                    ret = gen.convert_yielded(ret)
                except gen.BadYieldError:
                    # It's not unusual for add_callback to be used with
                    # methods returning a non-None and non-yieldable
                    # result, which should just be ignored.
                    pass
                else:
                    self.add_future(ret, lambda f: f.result())
        except Exception:
            self.handle_callback_exception(callback)

def _run_callback(self, callback):
        """Runs a callback with error handling.

        For use in subclasses.
        """
        try:
            ret = callback()
            if ret is not None:
                from tornado import gen
                # Functions that return Futures typically swallow all
                # exceptions and store them in the Future.  If a Future
                # makes it out to the IOLoop, ensure its exception (if any)
                # gets logged too.
                try:
                    ret = gen.convert_yielded(ret)
                except gen.BadYieldError:
                    # It's not unusual for add_callback to be used with
                    # methods returning a non-None and non-yieldable
                    # result, which should just be ignored.
                    pass
                else:
                    self.add_future(ret, lambda f: f.result())
        except Exception:
            self.handle_callback_exception(callback)

def _run_callback(self, callback):
        """Runs a callback with error handling.

        For use in subclasses.
        """
        try:
            ret = callback()
            if ret is not None:
                from tornado import gen
                # Functions that return Futures typically swallow all
                # exceptions and store them in the Future.  If a Future
                # makes it out to the IOLoop, ensure its exception (if any)
                # gets logged too.
                try:
                    ret = gen.convert_yielded(ret)
                except gen.BadYieldError:
                    # It's not unusual for add_callback to be used with
                    # methods returning a non-None and non-yieldable
                    # result, which should just be ignored.
                    pass
                else:
                    self.add_future(ret, lambda f: f.result())
        except Exception:
            self.handle_callback_exception(callback)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_bogus_yield_tuple(self):
        @gen.engine
        def f():
            yield (1, 2)
        self.assertRaises(gen.BadYieldError, self.run_gen, f)

def test_yield_sem(self):
        # Ensure we catch a "with (yield sem)", which should be
        # "with (yield sem.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Semaphore()):
                pass

def test_yield_lock(self):
        # Ensure we catch a "with (yield lock)", which should be
        # "with (yield lock.acquire())".
        with self.assertRaises(gen.BadYieldError):
            with (yield locks.Lock()):
                pass

def test_sync_result(self):
        with self.assertRaises(gen.BadYieldError):
            self.io_loop.run_sync(lambda: 42)

def test_bogus_yield(self):
        @gen.engine
        def f():
            yield 42
        self.assertRaises(gen.BadYieldError, self.run_gen, f)