Raise exception instances, not exception classes.

Raising raw exception classes works, but is old deprecated syntax, and
may bite us later.

Change-Id: I03f41da267ce5cbfc5ea98c531acc9a9b13e082a

nova/scheduler/host_manager.py

@@ -66,19 +66,19 @@ class ReadOnlyDict(UserDict.IterableUserDict):
         self.update(source)
 
     def __setitem__(self, key, item):
-        raise TypeError
+        raise TypeError()
 
     def __delitem__(self, key):
-        raise TypeError
+        raise TypeError()
 
     def clear(self):
-        raise TypeError
+        raise TypeError()
 
     def pop(self, key, *args):
-        raise TypeError
+        raise TypeError()
 
     def popitem(self):
-        raise TypeError
+        raise TypeError()
 
     def update(self, source=None):
         if source is None:
@@ -88,7 +88,7 @@ class ReadOnlyDict(UserDict.IterableUserDict):
         elif isinstance(source, type({})):
             self.data = source
         else:
-            raise TypeError
+            raise TypeError()
 
 
 class HostState(object):

nova/tests/api/openstack/compute/contrib/test_coverage_ext.py

@@ -47,7 +47,7 @@ class FakeCoverage(object):
 
     def stop(self):
         if not self.started:
-            raise AssertionError
+            raise AssertionError()
         self.started = False
 
     def report(self, file):

nova/tests/compute/test_compute.py

@@ -7462,7 +7462,7 @@ class ComputeAPITestCase(BaseTestCase):
 
         def fake_libvirt_driver_detach_volume_fails(*args, **kwargs):
             called['fake_libvirt_driver_detach_volume_fails'] = True
-            raise AttributeError
+            raise AttributeError()
 
         def fake_roll_detaching(*args, **kwargs):
             called['fake_roll_detaching'] = True

nova/tests/fake_ldap.py

@@ -217,19 +217,19 @@ class FakeLDAP(object):
     def simple_bind_s(self, dn, password):
         """This method is ignored, but provided for compatibility."""
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
         pass
 
     def unbind_s(self):
         """This method is ignored, but provided for compatibility."""
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
         pass
 
     def add_s(self, dn, attr):
         """Add an object with the specified attributes at dn."""
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
 
         key = "%s%s" % (self.__prefix, dn)
         value_dict = dict([(k, _to_json(v)) for k, v in attr])
@@ -238,7 +238,7 @@ class FakeLDAP(object):
     def delete_s(self, dn):
         """Remove the ldap object at specified dn."""
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
 
         Store.instance().delete("%s%s" % (self.__prefix, dn))
 
@@ -252,7 +252,7 @@ class FakeLDAP(object):
 
         """
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
 
         store = Store.instance()
         key = "%s%s" % (self.__prefix, dn)
@@ -292,7 +292,7 @@ class FakeLDAP(object):
 
         """
         if server_fail:
-            raise SERVER_DOWN
+            raise SERVER_DOWN()
 
         if scope != SCOPE_BASE and scope != SCOPE_SUBTREE:
             raise NotImplementedError(str(scope))

nova/tests/test_utils.py

@@ -325,7 +325,7 @@ class GenericUtilsTestCase(test.TestCase):
     def test_read_file_as_root(self):
         def fake_execute(*args, **kwargs):
             if args[1] == 'bad':
-                raise processutils.ProcessExecutionError
+                raise processutils.ProcessExecutionError()
             return 'fakecontents', None
 
         self.stubs.Set(utils, 'execute', fake_execute)

nova/virt/libvirt/imagebackend.py

@@ -175,13 +175,13 @@ class Image(object):
         return can_fallocate
 
     def snapshot_create(self):
-        raise NotImplementedError
+        raise NotImplementedError()
 
     def snapshot_extract(self, target, out_format):
-        raise NotImplementedError
+        raise NotImplementedError()
 
     def snapshot_delete(self):
-        raise NotImplementedError
+        raise NotImplementedError()
 
 
 class Raw(Image):

nova/virt/vmwareapi/read_write_util.py

@@ -97,15 +97,15 @@ class VMwareHTTPFile(object):
 
     def write(self, data):
         """Write data to the file."""
-        raise NotImplementedError
+        raise NotImplementedError()
 
     def read(self, chunk_size):
         """Read a chunk of data."""
-        raise NotImplementedError
+        raise NotImplementedError()
 
     def get_size(self):
         """Get size of the file to be read."""
-        raise NotImplementedError
+        raise NotImplementedError()
 
 
 class VMwareHTTPWriteFile(VMwareHTTPFile):