Python sys.getrefcount方法代碼示例

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_leak_in_structured_dtype_comparison(self):
        # gh-6250
        recordtype = np.dtype([('a', np.float64),
                               ('b', np.int32),
                               ('d', (str, 5))])

        # Simple case
        a = np.zeros(2, dtype=recordtype)
        for i in range(100):
            a == a
        assert_(sys.getrefcount(a) < 10)

        # The case in the bug report.
        before = sys.getrefcount(a)
        u, v = a[0], a[1]
        u == v
        del u, v
        gc.collect()
        after = sys.getrefcount(a)
        assert_equal(before, after) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _assert_valid_refcount(op):
    """
    Check that ufuncs don't mishandle refcount of object `1`.
    Used in a few regression tests.
    """
    if not HAS_REFCOUNT:
        return True
    import numpy as np, gc

    b = np.arange(100*100).reshape(100, 100)
    c = b
    i = 1

    gc.disable()
    try:
        rc = sys.getrefcount(i)
        for j in range(15):
            d = op(b, c)
        assert_(sys.getrefcount(i) >= rc)
    finally:
        gc.enable()
    del d  # for pyflakes 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _check_single_index(self, arr, index):
        """Check a single index item getting and simple setting.

        Parameters
        ----------
        arr : ndarray
            Array to be indexed, must be an arange.
        index : indexing object
            Index being tested. Must be a single index and not a tuple
            of indexing objects (see also `_check_multi_index`).
        """
        try:
            mimic_get, no_copy = self._get_multi_index(arr, (index,))
        except Exception as e:
            if HAS_REFCOUNT:
                prev_refcount = sys.getrefcount(arr)
            assert_raises(type(e), arr.__getitem__, index)
            assert_raises(type(e), arr.__setitem__, index, 0)
            if HAS_REFCOUNT:
                assert_equal(prev_refcount, sys.getrefcount(arr))
            return

        self._compare_index_result(arr, index, mimic_get, no_copy) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_structured_object_indexing(self, shape, index, items_changed,
                                        dt, pat, count, singleton):
        """Structured object reference counting for advanced indexing."""
        zero = 0
        one = 1

        arr = np.zeros(shape, dt)

        gc.collect()
        before_zero = sys.getrefcount(zero)
        before_one = sys.getrefcount(one)
        # Test item getting:
        part = arr[index]
        after_zero = sys.getrefcount(zero)
        assert after_zero - before_zero == count * items_changed
        del part
        # Test item setting:
        arr[index] = one
        gc.collect()
        after_zero = sys.getrefcount(zero)
        after_one = sys.getrefcount(one)
        assert before_zero - after_zero == count * items_changed
        assert after_one - before_one == count * items_changed 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_structured_object_take_and_repeat(self, dt, pat, count, singleton):
        """Structured object reference counting for specialized functions.
        The older functions such as take and repeat use different code paths
        then item setting (when writing this).
        """
        indices = [0, 1]

        arr = np.array([pat] * 3, dt)
        gc.collect()
        before = sys.getrefcount(singleton)
        res = arr.take(indices)
        after = sys.getrefcount(singleton)
        assert after - before == count * 2
        new = res.repeat(10)
        gc.collect()
        after_repeat = sys.getrefcount(singleton)
        assert after_repeat - after == count * 2 * 10 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_unpacker_hook_refcnt(self):
        if not hasattr(sys, 'getrefcount'):
            pytest.skip('no sys.getrefcount()')
        result = []

        def hook(x):
            result.append(x)
            return x

        basecnt = sys.getrefcount(hook)

        up = Unpacker(object_hook=hook, list_hook=hook)

        assert sys.getrefcount(hook) >= basecnt + 2

        up.feed(packb([{}]))
        up.feed(packb([{}]))
        assert up.unpack() == [{}]
        assert up.unpack() == [{}]
        assert result == [{}, [{}], {}, [{}]]

        del up

        assert sys.getrefcount(hook) == basecnt 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_1(self):
        from sys import getrefcount as grc

        f = dll._testfunc_callback_i_if
        f.restype = ctypes.c_int
        f.argtypes = [ctypes.c_int, MyCallback]

        def callback(value):
            #print "called back with", value
            return value

        self.assertEqual(grc(callback), 2)
        cb = MyCallback(callback)

        self.assertGreater(grc(callback), 2)
        result = f(-10, cb)
        self.assertEqual(result, -18)
        cb = None

        gc.collect()

        self.assertEqual(grc(callback), 2) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test__POINTER_c_char(self):
        class X(Structure):
            _fields_ = [("str", POINTER(c_char))]
        x = X()

        # NULL pointer access
        self.assertRaises(ValueError, getattr, x.str, "contents")
        b = c_buffer("Hello, World")
        from sys import getrefcount as grc
        self.assertEqual(grc(b), 2)
        x.str = b
        self.assertEqual(grc(b), 3)

        # POINTER(c_char) and Python string is NOT compatible
        # POINTER(c_char) and c_buffer() is compatible
        for i in range(len(b)):
            self.assertEqual(b[i], x.str[i])

        self.assertRaises(TypeError, setattr, x, "str", "Hello, World") 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_attributes_writable(self):
        if not self.rw_type:
            self.skipTest("no writable type to test")
        m = self.check_attributes_with_type(self.rw_type)
        self.assertEqual(m.readonly, False)

    # Disabled: unicode uses the old buffer API in 2.x

    #def test_getbuffer(self):
        ## Test PyObject_GetBuffer() on a memoryview object.
        #for tp in self._types:
            #b = tp(self._source)
            #oldrefcount = sys.getrefcount(b)
            #m = self._view(b)
            #oldviewrefcount = sys.getrefcount(m)
            #s = unicode(m, "utf-8")
            #self._check_contents(tp, b, s.encode("utf-8"))
            #self.assertEqual(sys.getrefcount(m), oldviewrefcount)
            #m = None
            #self.assertEqual(sys.getrefcount(b), oldrefcount) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _assert_valid_refcount(op):
    """
    Check that ufuncs don't mishandle refcount of object `1`.
    Used in a few regression tests.
    """
    import numpy as np

    b = np.arange(100*100).reshape(100, 100)
    c = b
    i = 1

    rc = sys.getrefcount(i)
    for j in range(15):
        d = op(b, c)
    assert_(sys.getrefcount(i) >= rc)
    del d  # for pyflakes 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _check_multi_index(self, arr, index):
        """Check a multi index item getting and simple setting.

        Parameters
        ----------
        arr : ndarray
            Array to be indexed, must be a reshaped arange.
        index : tuple of indexing objects
            Index being tested.
        """
        # Test item getting
        try:
            mimic_get, no_copy = self._get_multi_index(arr, index)
        except Exception:
            prev_refcount = sys.getrefcount(arr)
            assert_raises(Exception, arr.__getitem__, index)
            assert_raises(Exception, arr.__setitem__, index, 0)
            assert_equal(prev_refcount, sys.getrefcount(arr))
            return

        self._compare_index_result(arr, index, mimic_get, no_copy) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _check_single_index(self, arr, index):
        """Check a single index item getting and simple setting.

        Parameters
        ----------
        arr : ndarray
            Array to be indexed, must be an arange.
        index : indexing object
            Index being tested. Must be a single index and not a tuple
            of indexing objects (see also `_check_multi_index`).
        """
        try:
            mimic_get, no_copy = self._get_multi_index(arr, (index,))
        except Exception:
            prev_refcount = sys.getrefcount(arr)
            assert_raises(Exception, arr.__getitem__, index)
            assert_raises(Exception, arr.__setitem__, index, 0)
            assert_equal(prev_refcount, sys.getrefcount(arr))
            return

        self._compare_index_result(arr, index, mimic_get, no_copy) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def test_leak_in_structured_dtype_comparison(self):
        # gh-6250
        recordtype = np.dtype([('a', np.float64),
                               ('b', np.int32),
                               ('d', (np.str, 5))])

        # Simple case
        a = np.zeros(2, dtype=recordtype)
        for i in range(100):
            a == a
        assert_(sys.getrefcount(a) < 10)

        # The case in the bug report.
        before = sys.getrefcount(a)
        u, v = a[0], a[1]
        u == v
        del u, v
        gc.collect()
        after = sys.getrefcount(a)
        assert_equal(before, after) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _check_multi_index(self, arr, index):
        """Check a multi index item getting and simple setting.

        Parameters
        ----------
        arr : ndarray
            Array to be indexed, must be a reshaped arange.
        index : tuple of indexing objects
            Index being tested.
        """
        # Test item getting
        try:
            mimic_get, no_copy = self._get_multi_index(arr, index)
        except Exception as e:
            if HAS_REFCOUNT:
                prev_refcount = sys.getrefcount(arr)
            assert_raises(Exception, arr.__getitem__, index)
            assert_raises(Exception, arr.__setitem__, index, 0)
            if HAS_REFCOUNT:
                assert_equal(prev_refcount, sys.getrefcount(arr))
            return

        self._compare_index_result(arr, index, mimic_get, no_copy) 

# 需要導入模塊: import sys [as 別名]
# 或者: from sys import getrefcount [as 別名]
def _check_single_index(self, arr, index):
        """Check a single index item getting and simple setting.

        Parameters
        ----------
        arr : ndarray
            Array to be indexed, must be an arange.
        index : indexing object
            Index being tested. Must be a single index and not a tuple
            of indexing objects (see also `_check_multi_index`).
        """
        try:
            mimic_get, no_copy = self._get_multi_index(arr, (index,))
        except Exception as e:
            if HAS_REFCOUNT:
                prev_refcount = sys.getrefcount(arr)
            assert_raises(Exception, arr.__getitem__, index)
            assert_raises(Exception, arr.__setitem__, index, 0)
            if HAS_REFCOUNT:
                assert_equal(prev_refcount, sys.getrefcount(arr))
            return

        self._compare_index_result(arr, index, mimic_get, no_copy)