fix reasoning parsers plugin (#4104)

Author: yuanlehome

fastdeploy/input/preprocess.py

@@ -71,17 +71,9 @@ def create_processor(self):
         """
         reasoning_parser_obj = None
         tool_parser_obj = None
-        try:
-            from fastdeploy.plugins.reasoning_parser import (
-                load_reasoning_parser_plugins,
-            )
 
-            custom_reasoning_parser = load_reasoning_parser_plugins()
-            if self.reasoning_parser == "custom_reasoning_parser":
-                reasoning_parser_obj = custom_reasoning_parser
-        except:
-            if self.reasoning_parser:
-                reasoning_parser_obj = ReasoningParserManager.get_reasoning_parser(self.reasoning_parser)
+        if self.reasoning_parser:
+            reasoning_parser_obj = ReasoningParserManager.get_reasoning_parser(self.reasoning_parser)
         if self.tool_parser:
             tool_parser_obj = ToolParserManager.get_tool_parser(self.tool_parser)
 

fastdeploy/plugins/input_processor/__init__.py

@@ -23,5 +23,5 @@
 def load_input_processor_plugins():
     """load_input_processor_plugins"""
     plugins = load_plugins_by_group(group=PLUGINS_GROUP)
-    assert len(plugins) <= 1, "Most one plugin is allowed to be loaded."
+    assert len(plugins) == 1, "Only one plugin is allowed to be loaded."
     return next(iter(plugins.values()))()

fastdeploy/plugins/model_runner/__init__.py

@@ -14,19 +14,14 @@
 # limitations under the License.
 """
 
-from fastdeploy.plugins.utils import load_plugins_by_group, plugins_loaded
+from fastdeploy.plugins.utils import load_plugins_by_group
 
 # use for modle runner
 PLUGINS_GROUP = "fastdeploy.model_runner_plugins"
 
 
 def load_model_runner_plugins():
     """load_model_runner_plugins"""
-    global plugins_loaded
-    if plugins_loaded:
-        return
-    plugins_loaded = True
-
     plugins = load_plugins_by_group(group=PLUGINS_GROUP)
-    assert len(plugins) <= 1, "Most one plugin is allowed to be loaded."
+    assert len(plugins) == 1, "Only one plugin is allowed to be loaded."
     return next(iter(plugins.values()))()

fastdeploy/plugins/reasoning_parser/__init__.py

@@ -14,14 +14,20 @@
 # limitations under the License.
 """
 
-from fastdeploy.plugins.utils import load_plugins_by_group
+from fastdeploy.plugins.utils import load_plugins_by_group, plugins_loaded
 
 # make sure one process only loads plugins once
 PLUGINS_GROUP = "fastdeploy.reasoning_parser_plugins"
 
 
 def load_reasoning_parser_plugins():
     """load_reasoning_parser_plugins"""
+    global plugins_loaded
+    if plugins_loaded:
+        return
+    plugins_loaded = True
+
     plugins = load_plugins_by_group(group=PLUGINS_GROUP)
-    assert len(plugins) <= 1, "Most one plugin is allowed to be loaded."
-    return next(iter(plugins.values()))()
+    # general plugins, we only need to execute the loaded functions
+    for func in plugins.values():
+        func()

fastdeploy/reasoning/__init__.py

@@ -14,6 +14,8 @@
 # limitations under the License.
 """
 
+from fastdeploy.plugins import load_reasoning_parser_plugins
+
 from .abs_reasoning_parsers import ReasoningParser, ReasoningParserManager
 from .ernie_vl_reasoning_parsers import ErnieVLReasoningParser
 from .ernie_x1_reasoning_parsers import ErnieX1ReasoningParser
@@ -26,3 +28,5 @@
     "Qwen3ReasoningParser",
     "ErnieX1ReasoningParser",
 ]
+
+load_reasoning_parser_plugins()

fastdeploy/reasoning/ernie_x1_reasoning_parsers.py

@@ -1,14 +1,5 @@
+"""
 # Copyright (c) 2025  PaddlePaddle Authors. All Rights Reserved.
-#
-#
-from collections.abc import Sequence
-from typing import Tuple, Union
-
-from fastdeploy.entrypoints.openai.protocol import ChatCompletionRequest, DeltaMessage
-from fastdeploy.reasoning import ReasoningParser, ReasoningParserManager
-
-#
-#
 # Licensed under the Apache License, Version 2.0 (the "License"
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -20,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""
+
+from collections.abc import Sequence
+from typing import Tuple, Union
+
+from fastdeploy.entrypoints.openai.protocol import ChatCompletionRequest, DeltaMessage
+from fastdeploy.reasoning import ReasoningParser, ReasoningParserManager
 
 
 @ReasoningParserManager.register_module("ernie_x1")