From 8e4873a648185f6c2b8d2d376d5340b141754ad1 Mon Sep 17 00:00:00 2001
From: thucpn <thucsh2@gmail.com>
Date: Mon, 25 Dec 2023 15:48:53 +0700
Subject: [PATCH] feat: create chat engine folder for python
---
questions.ts | 18 +++++--
.../vectordbs/python/none}/constants.py | 0
.../vectordbs/python/none}/context.py | 0
.../vectordbs/python/none}/generate.py | 0
.../components/vectordbs/python/none/index.py | 25 ++++++++++
templates/index.ts | 12 ++++-
.../simple/fastapi/app/api/routers/chat.py | 5 +-
.../app/{context.py => engine/index.py} | 4 ++
.../types/streaming/fastapi/app/context.py | 11 -----
.../streaming/fastapi/app/engine/__init__.py | 0
.../streaming/fastapi/app/engine/index.py | 47 +++++++++++++------
11 files changed, 90 insertions(+), 32 deletions(-)
rename templates/{types/streaming/fastapi/app/engine => components/vectordbs/python/none}/constants.py (100%)
rename templates/{types/streaming/fastapi/app/engine => components/vectordbs/python/none}/context.py (100%)
rename templates/{types/streaming/fastapi/app/engine => components/vectordbs/python/none}/generate.py (100%)
create mode 100644 templates/components/vectordbs/python/none/index.py
rename templates/types/simple/fastapi/app/{context.py => engine/index.py} (94%)
delete mode 100644 templates/types/streaming/fastapi/app/context.py
delete mode 100644 templates/types/streaming/fastapi/app/engine/__init__.py
diff --git a/questions.ts b/questions.ts
index 109ac9fd..42fd144c 100644
--- a/questions.ts
+++ b/questions.ts
@@ -189,7 +189,11 @@ export const askQuestions = async (
}
}
- if (program.framework === "express" || program.framework === "nextjs") {
+ if (
+ program.framework === "express" ||
+ program.framework === "nextjs" ||
+ program.framework === "fastapi"
+ ) {
if (!program.model) {
if (ciInfo.isCI) {
program.model = getPrefOrDefault("model");
@@ -218,7 +222,11 @@ export const askQuestions = async (
}
}
- if (program.framework === "express" || program.framework === "nextjs") {
+ if (
+ program.framework === "express" ||
+ program.framework === "nextjs" ||
+ program.framework === "fastapi"
+ ) {
if (!program.engine) {
if (ciInfo.isCI) {
program.engine = getPrefOrDefault("engine");
@@ -243,7 +251,11 @@ export const askQuestions = async (
preferences.engine = engine;
}
}
- if (program.engine !== "simple" && !program.vectorDb) {
+ if (
+ program.engine !== "simple" &&
+ !program.vectorDb &&
+ program.framework !== "fastapi"
+ ) {
if (ciInfo.isCI) {
program.vectorDb = getPrefOrDefault("vectorDb");
} else {
diff --git a/templates/types/streaming/fastapi/app/engine/constants.py b/templates/components/vectordbs/python/none/constants.py
similarity index 100%
rename from templates/types/streaming/fastapi/app/engine/constants.py
rename to templates/components/vectordbs/python/none/constants.py
diff --git a/templates/types/streaming/fastapi/app/engine/context.py b/templates/components/vectordbs/python/none/context.py
similarity index 100%
rename from templates/types/streaming/fastapi/app/engine/context.py
rename to templates/components/vectordbs/python/none/context.py
diff --git a/templates/types/streaming/fastapi/app/engine/generate.py b/templates/components/vectordbs/python/none/generate.py
similarity index 100%
rename from templates/types/streaming/fastapi/app/engine/generate.py
rename to templates/components/vectordbs/python/none/generate.py
diff --git a/templates/components/vectordbs/python/none/index.py b/templates/components/vectordbs/python/none/index.py
new file mode 100644
index 00000000..8f7d3603
--- /dev/null
+++ b/templates/components/vectordbs/python/none/index.py
@@ -0,0 +1,25 @@
+import logging
+import os
+from llama_index import (
+ StorageContext,
+ load_index_from_storage,
+)
+
+from app.engine.constants import STORAGE_DIR
+from app.engine.context import create_service_context
+
+
+def get_chat_engine():
+ service_context = create_service_context()
+ # check if storage already exists
+ if not os.path.exists(STORAGE_DIR):
+ raise Exception(
+ "StorageContext is empty - call 'npm run generate' to generate the storage first"
+ )
+ logger = logging.getLogger("uvicorn")
+ # load the existing index
+ logger.info(f"Loading index from {STORAGE_DIR}...")
+ storage_context = StorageContext.from_defaults(persist_dir=STORAGE_DIR)
+ index = load_index_from_storage(storage_context, service_context=service_context)
+ logger.info(f"Finished loading index from {STORAGE_DIR}")
+ return index.as_chat_engine()
diff --git a/templates/index.ts b/templates/index.ts
index 2757f002..c9af6c18 100644
--- a/templates/index.ts
+++ b/templates/index.ts
@@ -311,7 +311,8 @@ const installPythonTemplate = async ({
root,
template,
framework,
-}: Pick<InstallTemplateArgs, "root" | "framework" | "template">) => {
+ engine,
+}: Pick<InstallTemplateArgs, "root" | "framework" | "template" | "engine">) => {
console.log("\nInitializing Python project with template:", template, "\n");
const templatePath = path.join(__dirname, "types", template, framework);
await copy("**", root, {
@@ -334,6 +335,15 @@ const installPythonTemplate = async ({
},
});
+ if (engine === "context") {
+ const compPath = path.join(__dirname, "components");
+ const VectorDBPath = path.join(compPath, "vectordbs", "python", "none");
+ await copy("**", path.join(root, "app", "engine"), {
+ parents: true,
+ cwd: VectorDBPath,
+ });
+ }
+
console.log(
"\nPython project, dependencies won't be installed automatically.\n",
);
diff --git a/templates/types/simple/fastapi/app/api/routers/chat.py b/templates/types/simple/fastapi/app/api/routers/chat.py
index e728db0d..b9082055 100644
--- a/templates/types/simple/fastapi/app/api/routers/chat.py
+++ b/templates/types/simple/fastapi/app/api/routers/chat.py
@@ -4,7 +4,7 @@ from fastapi import APIRouter, Depends, HTTPException, status
from llama_index import VectorStoreIndex
from llama_index.llms.base import MessageRole, ChatMessage
from pydantic import BaseModel
-from app.context import get_index
+from app.engine.index import get_chat_engine
chat_router = r = APIRouter()
@@ -25,7 +25,7 @@ class _Result(BaseModel):
@r.post("")
async def chat(
data: _ChatData,
- index: VectorStoreIndex = Depends(get_index),
+ chat_engine: VectorStoreIndex = Depends(get_chat_engine),
) -> _Result:
# check preconditions and get last message
if len(data.messages) == 0:
@@ -49,7 +49,6 @@ async def chat(
]
# query chat engine
- chat_engine = index.as_chat_engine()
response = chat_engine.chat(lastMessage.content, messages)
return _Result(
result=_Message(role=MessageRole.ASSISTANT, content=response.response)
diff --git a/templates/types/simple/fastapi/app/context.py b/templates/types/simple/fastapi/app/engine/index.py
similarity index 94%
rename from templates/types/simple/fastapi/app/context.py
rename to templates/types/simple/fastapi/app/engine/index.py
index 48ca79a9..8a5bfa5c 100644
--- a/templates/types/simple/fastapi/app/context.py
+++ b/templates/types/simple/fastapi/app/engine/index.py
@@ -38,3 +38,7 @@ def get_index():
index = load_index_from_storage(storage_context,service_context=service_context)
logger.info(f"Finished loading index from {STORAGE_DIR}")
return index
+
+def get_chat_engine():
+ index = get_index()
+ return index.as_chat_engine()
diff --git a/templates/types/streaming/fastapi/app/context.py b/templates/types/streaming/fastapi/app/context.py
deleted file mode 100644
index ae00de21..00000000
--- a/templates/types/streaming/fastapi/app/context.py
+++ /dev/null
@@ -1,11 +0,0 @@
-import os
-
-from llama_index import ServiceContext
-from llama_index.llms import OpenAI
-
-
-def create_base_context():
- model = os.getenv("MODEL", "gpt-3.5-turbo")
- return ServiceContext.from_defaults(
- llm=OpenAI(model=model),
- )
diff --git a/templates/types/streaming/fastapi/app/engine/__init__.py b/templates/types/streaming/fastapi/app/engine/__init__.py
deleted file mode 100644
index e69de29b..00000000
diff --git a/templates/types/streaming/fastapi/app/engine/index.py b/templates/types/streaming/fastapi/app/engine/index.py
index 8f7d3603..8a5bfa5c 100644
--- a/templates/types/streaming/fastapi/app/engine/index.py
+++ b/templates/types/streaming/fastapi/app/engine/index.py
@@ -1,25 +1,44 @@
-import logging
import os
+import logging
+
from llama_index import (
+ SimpleDirectoryReader,
StorageContext,
+ VectorStoreIndex,
load_index_from_storage,
+ ServiceContext,
)
+from llama_index.llms import OpenAI
-from app.engine.constants import STORAGE_DIR
-from app.engine.context import create_service_context
+STORAGE_DIR = "./storage" # directory to cache the generated index
+DATA_DIR = "./data" # directory containing the documents to index
+def create_base_context():
+ model = os.getenv("MODEL", "gpt-3.5-turbo")
+ return ServiceContext.from_defaults(
+ llm=OpenAI(model=model),
+ )
-def get_chat_engine():
- service_context = create_service_context()
+def get_index():
+ service_context = create_base_context()
+ logger = logging.getLogger("uvicorn")
# check if storage already exists
if not os.path.exists(STORAGE_DIR):
- raise Exception(
- "StorageContext is empty - call 'npm run generate' to generate the storage first"
- )
- logger = logging.getLogger("uvicorn")
- # load the existing index
- logger.info(f"Loading index from {STORAGE_DIR}...")
- storage_context = StorageContext.from_defaults(persist_dir=STORAGE_DIR)
- index = load_index_from_storage(storage_context, service_context=service_context)
- logger.info(f"Finished loading index from {STORAGE_DIR}")
+ logger.info("Creating new index")
+ # load the documents and create the index
+ documents = SimpleDirectoryReader(DATA_DIR).load_data()
+ index = VectorStoreIndex.from_documents(documents,service_context=service_context)
+ # store it for later
+ index.storage_context.persist(STORAGE_DIR)
+ logger.info(f"Finished creating new index. Stored in {STORAGE_DIR}")
+ else:
+ # load the existing index
+ logger.info(f"Loading index from {STORAGE_DIR}...")
+ storage_context = StorageContext.from_defaults(persist_dir=STORAGE_DIR)
+ index = load_index_from_storage(storage_context,service_context=service_context)
+ logger.info(f"Finished loading index from {STORAGE_DIR}")
+ return index
+
+def get_chat_engine():
+ index = get_index()
return index.as_chat_engine()
--
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