Add component Wikipedia (#1513)

### What problem does this PR solve?


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

graph/component/__init__.py

@@ -11,6 +11,7 @@ from .rewrite import RewriteQuestion, RewriteQuestionParam
 from .keyword import KeywordExtract, KeywordExtractParam
 from .baidu import Baidu, BaiduParam
 from .duckduckgo import DuckDuckGo, DuckDuckGoParam
+from .wikipedia import Wikipedia, WikipediaParam
 
 
 def component_class(class_name):

graph/component/wikipedia.py

@@ -0,0 +1,61 @@
+#
+#  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
+import wikipedia
+import pandas as pd
+from graph.settings import DEBUG
+from graph.component.base import ComponentBase, ComponentParamBase
+
+
+class WikipediaParam(ComponentParamBase):
+    """
+    Define the Wikipedia component parameters.
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.top_n = 10
+
+    def check(self):
+        self.check_positive_integer(self.top_n, "Top N")
+
+
+class Wikipedia(ComponentBase, ABC):
+    component_name = "Wikipedia"
+
+    def _run(self, history, **kwargs):
+        ans = self.get_input()
+        ans = " - ".join(ans["content"]) if "content" in ans else ""
+        if not ans:
+            return Wikipedia.be_output(self._param.no)
+
+        wiki_res = []
+        for wiki_key in wikipedia.search(ans, results=self._param.top_n):
+            try:
+                page = wikipedia.page(title=wiki_key, auto_suggest=False)
+                wiki_res.append({"content": '<a href="' + page.url + '">' + page.title + '</a> ' + page.summary})
+            except Exception as e:
+                print(e)
+                pass
+
+        if not wiki_res:
+            return Wikipedia.be_output(self._param.no)
+
+        df = pd.DataFrame(wiki_res)
+        if DEBUG: print(df, ":::::::::::::::::::::::::::::::::")
+        return df