added wrapper for azure cognitive search retrieval

dsp/modules/azurecognitivesearch.py

@@ -0,0 +1,65 @@
+from typing import Optional, Union, Any
+
+from dsp.utils import dotdict
+
+from azure.core.credentials import AzureKeyCredential
+from azure.search.documents import SearchClient
+from azure.search.documents._paging import SearchItemPaged
+
+
+class AzureCognitiveSearch:
+    """Wrapper for the Azure Congitive Search Retrieval."""
+
+    def __init__(
+        self,
+        search_service_name: str,
+        search_api_key: str,
+        search_index_name: str,
+        field_text: str, # required field to map with "content" field in dsp framework
+        field_score: str, # required field to map with "score" field in dsp framework
+
+    ):
+        self.search_service_name = search_service_name
+        self.search_api_key = search_api_key
+        self.search_index_name = search_index_name
+        self.endpoint=f"https://{self.search_service_name}.search.windows.net"
+        self.field_text = field_text # field name of the text content
+        self.field_score = field_score # field name of the search score
+        # Create a client
+        self.credential = AzureKeyCredential(self.search_api_key)
+        self.client = SearchClient(endpoint=self.endpoint,
+                        index_name=self.search_index_name,
+                        credential=self.credential)
+
+    def __call__(self, query: str, k: int = 10) -> Union[list[str], list[dotdict]]:
+
+        topk: list[dict[str, Any]] = azure_search_request(self.field_text, self.field_score, self.client, query, k)
+        topk = [{**d, "long_text": d["text"]} for d in topk]            
+
+        return [dotdict(psg) for psg in topk]
+
+def azure_search_request(key_content: str, key_score: str,  client: SearchClient, query: str, top: int =1):
+    '''
+    Search in Azure Conginitve Search Index
+    '''
+    results = client.search(search_text=query,top=top)
+    results = process_azure_result(results, key_content, key_content)
+
+    return results
+
+def process_azure_result(results:SearchItemPaged, content_key:str, content_score: str):
+    '''
+    process received result from Azure cognitive search as dictionary array and map content and score to correct format
+    '''
+    res = []
+    for result in results:
+        tmp = {}
+        for key, value in result.items():
+            if(key == content_key):
+                tmp["text"] = value # assign content
+            elif(key == content_score):
+                tmp["score"] = value
+            else:
+                tmp[key] = value            
+        res.append(tmp)
+    return res 

setup.py

@@ -20,7 +20,8 @@
         "regex",
         "ujson",
         "tqdm",
-        "datasets"
+        "datasets",
+        'azure-search-documents'        
     ],
     classifiers=[
 		"Development Status :: 3 - Alpha",