Fix for similarity_search_with_score (#9903)

- Description: the implementation for similarity_search_with_score did
not actually include a score or logic to filter. Now fixed.
- Tag maintainer: @rlancemartin
- Twitter handle: @ofermend

docs/extras/integrations/vectorstores/vectara.ipynb

@@ -1,7 +1,6 @@
 {
  "cells": [
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "683953b3",
    "metadata": {},
@@ -60,7 +59,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "eeead681",
    "metadata": {},
@@ -73,7 +71,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "id": "04a1f1a0",
    "metadata": {},
    "outputs": [],
@@ -86,12 +84,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 2,
    "id": "be0a4973",
    "metadata": {},
    "outputs": [],
    "source": [
-    "loader = TextLoader(\"../../../state_of_the_union.txt\")\n",
+    "loader = TextLoader(\"../../modules/state_of_the_union.txt\")\n",
     "documents = loader.load()\n",
     "text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)\n",
     "docs = text_splitter.split_documents(documents)"
@@ -99,7 +97,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 3,
    "id": "8429667e",
    "metadata": {
     "ExecuteTime": {
@@ -118,7 +116,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "90dbf3e7",
    "metadata": {},
@@ -133,7 +130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 4,
    "id": "85ef3468",
    "metadata": {},
    "outputs": [],
@@ -165,7 +162,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "1f9215c8",
    "metadata": {
@@ -182,7 +178,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 5,
    "id": "a8c513ab",
    "metadata": {
     "ExecuteTime": {
@@ -201,7 +197,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 6,
    "id": "fc516993",
    "metadata": {
     "ExecuteTime": {
@@ -215,13 +211,7 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Tonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections. \n",
-      "\n",
-      "Tonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service. \n",
-      "\n",
-      "One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. \n",
-      "\n",
-      "And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.\n"
+      "And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson.\n"
      ]
     }
    ],
@@ -230,7 +220,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "1bda9bf5",
    "metadata": {},
@@ -242,7 +231,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 7,
    "id": "8804a21d",
    "metadata": {
     "ExecuteTime": {
@@ -254,13 +243,13 @@
    "source": [
     "query = \"What did the president say about Ketanji Brown Jackson\"\n",
     "found_docs = vectara.similarity_search_with_score(\n",
-    "    query, filter=\"doc.speech = 'state-of-the-union'\"\n",
+    "    query, filter=\"doc.speech = 'state-of-the-union'\", score_threshold=0.2,\n",
     ")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 8,
    "id": "756a6887",
    "metadata": {
     "ExecuteTime": {
@@ -273,15 +262,9 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Tonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections. \n",
+      "Justice Breyer, thank you for your service. One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence. A former top litigator in private practice.\n",
       "\n",
-      "Tonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service. \n",
-      "\n",
-      "One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. \n",
-      "\n",
-      "And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.\n",
-      "\n",
-      "Score: 0.4917977\n"
+      "Score: 0.786569\n"
      ]
     }
    ],
@@ -292,7 +275,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "1f9876a8",
    "metadata": {},
@@ -302,7 +284,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 9,
    "id": "47784de5",
    "metadata": {},
    "outputs": [
@@ -310,22 +292,43 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "(Document(page_content='We must forever conduct our struggle on the high plane of dignity and discipline.', metadata={'section': '1'}), 0.7962591)\n",
-      "(Document(page_content='We must not allow our\\ncreative protests to degenerate into physical violence. . . .', metadata={'section': '1'}), 0.25983918)\n"
+      "With this threshold of 1.2 we have 0 documents\n"
      ]
     }
    ],
    "source": [
     "query = \"We must forever conduct our struggle\"\n",
+    "min_score = 1.2\n",
     "found_docs = vectara.similarity_search_with_score(\n",
-    "    query, filter=\"doc.speech = 'I-have-a-dream'\"\n",
+    "    query, filter=\"doc.speech = 'I-have-a-dream'\", score_threshold=min_score,\n",
     ")\n",
-    "print(found_docs[0])\n",
-    "print(found_docs[1])"
+    "print(f\"With this threshold of {min_score} we have {len(found_docs)} documents\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "3e22949f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "With this threshold of 0.2 we have 3 documents\n"
+     ]
+    }
+   ],
+   "source": [
+    "query = \"We must forever conduct our struggle\"\n",
+    "min_score = 0.2\n",
+    "found_docs = vectara.similarity_search_with_score(\n",
+    "    query, filter=\"doc.speech = 'I-have-a-dream'\", score_threshold=min_score,\n",
+    ")\n",
+    "print(f\"With this threshold of {min_score} we have {len(found_docs)} documents\")\n"
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "691a82d6",
    "metadata": {},
@@ -349,7 +352,7 @@
     {
      "data": {
       "text/plain": [
-       "VectaraRetriever(vectorstore=<langchain.vectorstores.vectara.Vectara object at 0x12772caf0>, search_type='similarity', search_kwargs={'lambda_val': 0.025, 'k': 5, 'filter': '', 'n_sentence_context': '0'})"
+       "VectaraRetriever(tags=['Vectara'], metadata=None, vectorstore=<langchain.vectorstores.vectara.Vectara object at 0x1586bd330>, search_type='similarity', search_kwargs={'lambda_val': 0.025, 'k': 5, 'filter': '', 'n_sentence_context': '2'})"
       ]
      },
      "execution_count": 11,
@@ -376,7 +379,7 @@
     {
      "data": {
       "text/plain": [
-       "Document(page_content='Tonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections. \\n\\nTonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service. \\n\\nOne of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. \\n\\nAnd I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.', metadata={'source': '../../../state_of_the_union.txt'})"
+       "Document(page_content='Justice Breyer, thank you for your service. One of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. And I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence. A former top litigator in private practice.', metadata={'source': 'langchain', 'lang': 'eng', 'offset': '596', 'len': '97', 'speech': 'state-of-the-union'})"
       ]
      },
      "execution_count": 12,
@@ -414,7 +417,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.1"
+   "version": "3.10.9"
   }
  },
  "nbformat": 4,