[Refactor] Suppress SyntaxWarning from ast.literal_eval in tool parsers

vllm/tool_parsers/glm4_moe_tool_parser.py

@@ -11,7 +11,6 @@
 streaming experience for long content.
 """
 
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -42,6 +41,7 @@
     extract_types_from_schema,
     find_tool_properties,
     partial_tag_overlap,
+    safe_literal_eval,
 )
 
 logger = init_logger(__name__)
@@ -110,7 +110,7 @@ def _deserialize(value: str) -> Any:
             pass
 
         try:
-            return ast.literal_eval(value)
+            return safe_literal_eval(value)
         except (ValueError, SyntaxError):
             pass
 

vllm/tool_parsers/hy_v3_tool_parser.py

@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -27,6 +26,7 @@
     Tool,
     ToolParser,
 )
+from vllm.tool_parsers.utils import safe_literal_eval
 
 logger = init_logger(__name__)
 
@@ -183,13 +183,13 @@ def _try_parse_wildcard_number(value: str) -> int | float | None:
 
     @staticmethod
     def _deserialize(value: str) -> Any:
-        """Deserialize a string value using json.loads then ast.literal_eval."""
+        """Deserialize a string value using json.loads then safe_literal_eval."""
         try:
             return json.loads(value)
         except Exception:
             pass
         try:
-            return ast.literal_eval(value)
+            return safe_literal_eval(value)
         except Exception:
             pass
         return value

vllm/tool_parsers/minicpm5xml_tool_parser.py

@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -28,7 +27,7 @@
     Tool,
     ToolParser,
 )
-from vllm.tool_parsers.utils import partial_tag_overlap
+from vllm.tool_parsers.utils import partial_tag_overlap, safe_literal_eval
 from vllm.utils import random_uuid
 
 logger = init_logger(__name__)
@@ -116,7 +115,7 @@ def _parse_arguments(json_value: str) -> tuple[Any, bool]:
         try:
             parsed_value = json.loads(json_value)
         except json.JSONDecodeError:
-            parsed_value = ast.literal_eval(json_value)
+            parsed_value = safe_literal_eval(json_value)
         return parsed_value, True
     except Exception:
         return json_value, False

vllm/tool_parsers/poolside_v1_tool_parser.py

@@ -11,7 +11,6 @@
 streaming experience for long content.
 """
 
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -41,6 +40,7 @@
     Tool,
     ToolParser,
 )
+from vllm.tool_parsers.utils import safe_literal_eval
 
 logger = init_logger(__name__)
 
@@ -106,7 +106,7 @@ def _deserialize(value: str) -> Any:
             pass
 
         try:
-            return ast.literal_eval(value)
+            return safe_literal_eval(value)
         except (ValueError, SyntaxError):
             pass
 

vllm/tool_parsers/qwen3xml_tool_parser.py

@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -26,7 +25,7 @@
     Tool,
     ToolParser,
 )
-from vllm.tool_parsers.utils import find_tool_properties
+from vllm.tool_parsers.utils import find_tool_properties, safe_literal_eval
 
 logger = init_logger(__name__)
 
@@ -824,7 +823,7 @@ def _end_element(self, name: str):
                     try:
                         parsed_value = json.loads(raw_for_parse)
                     except json.JSONDecodeError:
-                        parsed_value = ast.literal_eval(raw_for_parse)
+                        parsed_value = safe_literal_eval(raw_for_parse)
                     output_arguments = json.dumps(parsed_value, ensure_ascii=False)
                 except Exception:
                     # Fallback: output as string as-is

vllm/tool_parsers/step3p5_tool_parser.py

@@ -1,6 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
-import ast
 import json
 from collections.abc import Sequence
 from typing import Any
@@ -23,6 +22,7 @@
 from vllm.logger import init_logger
 from vllm.tokenizers import TokenizerLike
 from vllm.tool_parsers.abstract_tool_parser import Tool, ToolParser
+from vllm.tool_parsers.utils import safe_literal_eval
 
 logger = init_logger(__name__)
 
@@ -1016,7 +1016,7 @@ def _end_element(self, name: str):
                         raw_for_parse = raw_text + "\n"
                     else:
                         raw_for_parse = raw_text
-                    parsed_value = ast.literal_eval(raw_for_parse)
+                    parsed_value = safe_literal_eval(raw_for_parse)
                     output_arguments = json.dumps(parsed_value, ensure_ascii=False)
                 except Exception:
                     # Fallback: output as string as-is

vllm/tool_parsers/utils.py

@@ -3,6 +3,7 @@
 
 import ast
 import json
+import warnings
 from json import JSONDecodeError, JSONDecoder
 from typing import Any, TypeAlias
 
@@ -31,6 +32,12 @@
 logger = init_logger(__name__)
 
 
+def safe_literal_eval(text: str):
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", SyntaxWarning)
+        return ast.literal_eval(text)
+
+
 def partial_tag_overlap(text: str, tag: str) -> int:
     """Length of the longest prefix of *tag* that matches a suffix of *text*.