Fix MiniMax M2 parallel tool calling (#1171)

Author: kernelpool

mlx_lm/tool_parsers/minimax_m2.py

@@ -157,43 +157,44 @@ def _get_param_types_from_config(param_name: str, param_config: dict) -> list[st
 
 
 def parse_tool_call(text: str, tools: list | None = None):
-    invoke_match = _invoke_complete_regex.findall(text)
-    if not invoke_match:
+    invoke_matches = _invoke_complete_regex.findall(text)
+    if not invoke_matches:
         raise ValueError("No tool call found")
-    invoke_text = invoke_match[0]
 
-    name_match = re.search(r"^([^>]+)", invoke_text)
-    if not name_match:
-        return None
-
-    function_name = _extract_name(name_match.group(1))
-
-    # Get parameter configuration
-    param_config = {}
+    param_config_for = {}
     if tools:
         for tool in tools:
             if func := tool.get("function", False):
-                if func["name"] != function_name:
-                    continue
                 if params := func.get("parameters", False):
-                    param_config = params.get("properties", {})
-
-    # Extract parameters
-    param_dict = {}
-    for match in _parameter_complete_regex.findall(invoke_text):
-        param_match = re.search(r"^([^>]+)>(.*)", match, re.DOTALL)
-        if param_match:
-            param_name = _extract_name(param_match.group(1))
-            param_value = param_match.group(2).strip()
-            if param_value.startswith("\n"):
-                param_value = param_value[1:]
-            if param_value.endswith("\n"):
-                param_value = param_value[:-1]
-
-            param_type = _get_param_types_from_config(param_name, param_config)
-
-            param_dict[param_name] = _convert_param_value_with_types(
-                param_value, param_type
-            )
-
-    return dict(name=function_name, arguments=param_dict)
+                    param_config_for[func["name"]] = params.get("properties", {})
+
+    calls = []
+    for invoke_text in invoke_matches:
+        name_match = re.search(r"^([^>]+)", invoke_text)
+        if not name_match:
+            continue
+        function_name = _extract_name(name_match.group(1))
+        param_config = param_config_for.get(function_name, {})
+
+        param_dict = {}
+        for match in _parameter_complete_regex.findall(invoke_text):
+            param_match = re.search(r"^([^>]+)>(.*)", match, re.DOTALL)
+            if param_match:
+                param_name = _extract_name(param_match.group(1))
+                param_value = param_match.group(2).strip()
+                if param_value.startswith("\n"):
+                    param_value = param_value[1:]
+                if param_value.endswith("\n"):
+                    param_value = param_value[:-1]
+
+                param_type = _get_param_types_from_config(param_name, param_config)
+
+                param_dict[param_name] = _convert_param_value_with_types(
+                    param_value, param_type
+                )
+
+        calls.append(dict(name=function_name, arguments=param_dict))
+
+    if len(calls) == 1:
+        return calls[0]
+    return calls

tests/test_tool_parsing.py

@@ -292,6 +292,22 @@ def test_kimi_k2(self):
         ]
         self.assertEqual(tool_calls, expected)
 
+    def test_minimax_m2(self):
+        test_case = (
+            '<invoke name="search">\n'
+            '<parameter name="query">weather</parameter>\n'
+            "</invoke>\n"
+            '<invoke name="read_file">\n'
+            '<parameter name="path">/tmp/test.txt</parameter>\n'
+            "</invoke>"
+        )
+        expected = [
+            {"name": "search", "arguments": {"query": "weather"}},
+            {"name": "read_file", "arguments": {"path": "/tmp/test.txt"}},
+        ]
+        tool_calls = minimax_m2.parse_tool_call(test_case, None)
+        self.assertEqual(expected, tool_calls)
+
 
 if __name__ == "__main__":
     unittest.main()