refactor name of duckduckgo (#1496)

### What problem does this PR solve?


### Type of change

- [x] Refactoring

graph/component/__init__.py

@@ -10,7 +10,7 @@ from .message import Message, MessageParam
 from .rewrite import RewriteQuestion, RewriteQuestionParam
 from .keyword import KeywordExtract, KeywordExtractParam
 from .baidu import Baidu, BaiduParam
-from .duckduckgosearch import DuckDuckGoSearch, DuckDuckGoSearchParam
+from .duckduckgo import DuckDuckGo, DuckDuckGoParam
 
 
 def component_class(class_name):

graph/component/{duckduckgosearch.py → duckduckgo.py}

@@ -1,62 +1,62 @@
-#
-#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
-#
-#  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
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  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.
-#
-import random
-from abc import ABC
-from functools import partial
-from duckduckgo_search import DDGS
-import pandas as pd
-
-from graph.component.base import ComponentBase, ComponentParamBase
-
-
-class DuckDuckGoSearchParam(ComponentParamBase):
-    """
-    Define the DuckDuckGoSearch component parameters.
-    """
-
-    def __init__(self):
-        super().__init__()
-        self.top_n = 10
-        self.channel = "text"
-
-    def check(self):
-        self.check_positive_integer(self.top_n, "Top N")
-        self.check_valid_value(self.channel, "Web Search or News", ["text", "news"])
-
-
-class DuckDuckGoSearch(ComponentBase, ABC):
-    component_name = "DuckDuckGoSearch"
-
-    def _run(self, history, **kwargs):
-        ans = self.get_input()
-        ans = " - ".join(ans["content"]) if "content" in ans else ""
-        if not ans:
-            return DuckDuckGoSearch.be_output(self._param.no)
-
-        if self.channel == "text":
-            with DDGS() as ddgs:
-                # {'title': '', 'href': '', 'body': ''}
-                duck_res = [{"content": '<a href="' + i["href"] + '">' + i["title"] + '</a>    ' + i["body"]} for i in
-                            ddgs.text(ans, max_results=self._param.top_n)]
-        elif self.channel == "news":
-            with DDGS() as ddgs:
-                # {'date': '', 'title': '', 'body': '', 'url': '', 'image': '', 'source': ''}
-                duck_res = [{"content": '<a href="' + i["url"] + '">' + i["title"] + '</a>    ' + i["body"]} for i in
-                            ddgs.news(ans, max_results=self._param.top_n)]
-
-        df = pd.DataFrame(duck_res)
-        print(df, ":::::::::::::::::::::::::::::::::")
-        return df
+#
+#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
+#
+#  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
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  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.
+#
+import random
+from abc import ABC
+from functools import partial
+from duckduckgo_search import DDGS
+import pandas as pd
+
+from graph.component.base import ComponentBase, ComponentParamBase
+
+
+class DuckDuckGoParam(ComponentParamBase):
+    """
+    Define the DuckDuckGo component parameters.
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.top_n = 10
+        self.channel = "text"
+
+    def check(self):
+        self.check_positive_integer(self.top_n, "Top N")
+        self.check_valid_value(self.channel, "Web Search or News", ["text", "news"])
+
+
+class DuckDuckGo(ComponentBase, ABC):
+    component_name = "DuckDuckGo"
+
+    def _run(self, history, **kwargs):
+        ans = self.get_input()
+        ans = " - ".join(ans["content"]) if "content" in ans else ""
+        if not ans:
+            return DuckDuckGo.be_output(self._param.no)
+
+        if self.channel == "text":
+            with DDGS() as ddgs:
+                # {'title': '', 'href': '', 'body': ''}
+                duck_res = [{"content": '<a href="' + i["href"] + '">' + i["title"] + '</a>    ' + i["body"]} for i in
+                            ddgs.text(ans, max_results=self._param.top_n)]
+        elif self.channel == "news":
+            with DDGS() as ddgs:
+                # {'date': '', 'title': '', 'body': '', 'url': '', 'image': '', 'source': ''}
+                duck_res = [{"content": '<a href="' + i["url"] + '">' + i["title"] + '</a>    ' + i["body"]} for i in
+                            ddgs.news(ans, max_results=self._param.top_n)]
+
+        df = pd.DataFrame(duck_res)
+        print(df, ":::::::::::::::::::::::::::::::::")
+        return df