Restructure graph/ subpackage to use __all__ and star imports

Add __all__ to each graph submodule and rewrite graph/__init__.py
to use 'from ._module import *' pattern, matching the convention
already used by _memory/ and system/ subpackages.

- _graph_builder.pyx: __all__ = Graph, GraphBuilder, GraphCompleteOptions, GraphDebugPrintOptions
- _graph_def.pyx: __all__ = Condition, GraphAllocOptions, GraphDef
- _graph_node.pyx: __all__ = GraphNode
- _subclasses.pyx: __all__ = all 15 node subclasses
- __init__.py: replaced explicit named imports with star imports

Author: mdboom

cuda_core/cuda/core/graph/__init__.py

@@ -2,32 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-from cuda.core.graph._graph_builder import (
-    Graph,
-    GraphBuilder,
-    GraphCompleteOptions,
-    GraphDebugPrintOptions,
-)
-from cuda.core.graph._graph_def import (
-    Condition,
-    GraphAllocOptions,
-    GraphDef,
-)
-from cuda.core.graph._graph_node import GraphNode
-from cuda.core.graph._subclasses import (
-    AllocNode,
-    ChildGraphNode,
-    ConditionalNode,
-    EmptyNode,
-    EventRecordNode,
-    EventWaitNode,
-    FreeNode,
-    HostCallbackNode,
-    IfElseNode,
-    IfNode,
-    KernelNode,
-    MemcpyNode,
-    MemsetNode,
-    SwitchNode,
-    WhileNode,
-)
+from ._graph_builder import *
+from ._graph_def import *
+from ._graph_node import *
+from ._subclasses import *

cuda_core/cuda/core/graph/_graph_builder.pyx

@@ -21,6 +21,9 @@ from cuda.core._utils.cuda_utils import (
     handle_return,
 )
 
+__all__ = ['Graph', 'GraphBuilder', 'GraphCompleteOptions', 'GraphDebugPrintOptions']
+
+
 @dataclass
 class GraphDebugPrintOptions:
     """Options for debug_dot_print().

cuda_core/cuda/core/graph/_graph_def.pyx

@@ -27,6 +27,8 @@ from dataclasses import dataclass
 
 from cuda.core._utils.cuda_utils import driver
 
+__all__ = ['Condition', 'GraphAllocOptions', 'GraphDef']
+
 
 cdef class Condition:
     """A condition variable for conditional graph nodes.

cuda_core/cuda/core/graph/_graph_node.pyx

@@ -61,6 +61,8 @@ import weakref
 from cuda.core.graph._adjacency_set_proxy import AdjacencySetProxy
 from cuda.core._utils.cuda_utils import driver
 
+__all__ = ['GraphNode']
+
 # See _cpp/REGISTRY_DESIGN.md (Level 2: Resource Handle -> Python Object)
 _node_registry = weakref.WeakValueDictionary()
 

cuda_core/cuda/core/graph/_subclasses.pyx

@@ -34,6 +34,24 @@ from cuda.core.graph._utils cimport _is_py_host_trampoline
 
 from cuda.core._utils.cuda_utils import driver, handle_return
 
+__all__ = [
+    'AllocNode',
+    'ChildGraphNode',
+    'ConditionalNode',
+    'EmptyNode',
+    'EventRecordNode',
+    'EventWaitNode',
+    'FreeNode',
+    'HostCallbackNode',
+    'IfElseNode',
+    'IfNode',
+    'KernelNode',
+    'MemcpyNode',
+    'MemsetNode',
+    'SwitchNode',
+    'WhileNode',
+]
+
 
 cdef bint _has_cuGraphNodeGetParams = False
 cdef bint _version_checked = False