test_cursor.py 文件源码

def test_mogrify_leak_on_multiple_reference(self):
        # issue #81: reference leak when a parameter value is referenced
        # more than once from a dict.
        cur = self.conn.cursor()
        foo = (lambda x: x)('foo') * 10
        import sys
        nref1 = sys.getrefcount(foo)
        cur.mogrify("select %(foo)s, %(foo)s, %(foo)s", {'foo': foo})
        nref2 = sys.getrefcount(foo)
        self.assertEqual(nref1, nref2)