Lazy import slow python modules to speed up loading

agents/ten_packages/extension/aliyun_analyticdb_vector_storage/vector_storage_extension.py

@@ -4,8 +4,6 @@
 import asyncio
 import os
 import json
-from .client import AliGPDBClient
-from .model import Model
 from ten import (
     Extension,
     TenEnv,
@@ -20,12 +18,6 @@
 import threading
 from datetime import datetime
 
-from alibabacloud_gpdb20160503.client import Client as gpdb20160503Client
-from alibabacloud_tea_openapi import models as open_api_models
-from alibabacloud_gpdb20160503 import models as gpdb_20160503_models
-from alibabacloud_tea_util import models as util_models
-from alibabacloud_tea_util.client import Client as UtilClient
-
 
 class AliPGDBExtension(Extension):
     def __init__(self, name):
@@ -37,7 +29,7 @@ def __init__(self, name):
         self.region_id = os.environ.get("ADBPG_INSTANCE_REGION")
         self.dbinstance_id = os.environ.get("ADBPG_INSTANCE_ID")
         self.endpoint = f"gpdb.aliyuncs.com"
-        self.client = None
+        self.model = None
         self.account = os.environ.get("ADBPG_ACCOUNT")
         self.account_password = os.environ.get("ADBPG_ACCOUNT_PASSWORD")
         self.namespace = os.environ.get("ADBPG_NAMESPACE")
@@ -92,9 +84,15 @@ def on_start(self, ten: TenEnv) -> None:
             self.endpoint = "gpdb.aliyuncs.com"
         else:
             self.endpoint = f"gpdb.{self.region_id}.aliyuncs.com"
-        self.client = AliGPDBClient(
+
+        # lazy import packages which requires long time to load
+        from .client import AliGPDBClient
+        from .model import Model
+
+        client = AliGPDBClient(
             self.access_key_id, self.access_key_secret, self.endpoint
         )
+        self.model = Model(self.region_id, self.dbinstance_id, client)
         self.thread = threading.Thread(
             target=asyncio.run, args=(self.__thread_routine(ten),)
         )
@@ -141,19 +139,18 @@ def on_cmd(self, ten: TenEnv, cmd: Cmd) -> None:
             ten.return_result(CmdResult.create(StatusCode.ERROR), cmd)
 
     async def async_create_collection(self, ten: TenEnv, cmd: Cmd):
-        m = Model(self.region_id, self.dbinstance_id, self.client)
         collection = cmd.get_property_string("collection_name")
         dimension = 1024
         try:
             dimension = cmd.get_property_int("dimension")
         except Exception as e:
             logger.warning(f"Error: {e}")
 
-        err = await m.create_collection_async(
+        err = await self.model.create_collection_async(
             self.account, self.account_password, self.namespace, collection
         )
         if err is None:
-            await m.create_vector_index_async(
+            await self.model.create_vector_index_async(
                 self.account,
                 self.account_password,
                 self.namespace,
@@ -166,14 +163,13 @@ async def async_create_collection(self, ten: TenEnv, cmd: Cmd):
 
     async def async_upsert_vector(self, ten: TenEnv, cmd: Cmd):
         start_time = datetime.now()
-        m = Model(self.region_id, self.dbinstance_id, self.client)
         collection = cmd.get_property_string("collection_name")
         file = cmd.get_property_string("file_name")
         content = cmd.get_property_string("content")
         obj = json.loads(content)
         rows = [(file, item["text"], item["embedding"]) for item in obj]
 
-        err = await m.upsert_collection_data_async(
+        err = await self.model.upsert_collection_data_async(
             collection, self.namespace, self.namespace_password, rows
         )
         logger.info(
@@ -192,12 +188,11 @@ async def async_upsert_vector(self, ten: TenEnv, cmd: Cmd):
 
     async def async_query_vector(self, ten: TenEnv, cmd: Cmd):
         start_time = datetime.now()
-        m = Model(self.region_id, self.dbinstance_id, self.client)
         collection = cmd.get_property_string("collection_name")
         embedding = cmd.get_property_to_json("embedding")
         top_k = cmd.get_property_int("top_k")
         vector = json.loads(embedding)
-        response, error = await m.query_collection_data_async(
+        response, error = await self.model.query_collection_data_async(
             collection, self.namespace, self.namespace_password, vector, top_k=top_k
         )
         logger.info(
@@ -212,15 +207,14 @@ async def async_query_vector(self, ten: TenEnv, cmd: Cmd):
         if error:
             return ten.return_result(CmdResult.create(StatusCode.ERROR), cmd)
         else:
-            body = m.parse_collection_data(response.body)
+            body = self.model.parse_collection_data(response.body)
             ret = CmdResult.create(StatusCode.OK)
             ret.set_property_from_json("response", body)
             ten.return_result(ret, cmd)
 
     async def async_delete_collection(self, ten: TenEnv, cmd: Cmd):
-        m = Model(self.region_id, self.dbinstance_id, self.client)
         collection = cmd.get_property_string("collection_name")
-        err = await m.delete_collection_async(
+        err = await self.model.delete_collection_async(
             self.account, self.account_password, self.namespace, collection
         )
         if err is None:

agents/ten_packages/extension/aliyun_text_embedding/embedding_extension.py

@@ -6,7 +6,6 @@
     CmdResult,
 )
 
-import dashscope
 import json
 from typing import Generator, List
 from http import HTTPStatus
@@ -45,6 +44,11 @@ def on_start(self, ten: TenEnv) -> None:
         self.api_key = self.get_property_string(ten, "api_key", self.api_key)
         self.model = self.get_property_string(ten, "model", self.api_key)
 
+
+        # lazy import packages which requires long time to load
+        global dashscope
+        import dashscope
+
         dashscope.api_key = self.api_key
 
         for i in range(self.parallel):

agents/ten_packages/extension/file_chunker/file_chunker_extension.py

@@ -14,8 +14,6 @@
 )
 from typing import List, Any
 from .log import logger
-from llama_index.core import SimpleDirectoryReader
-from llama_index.core.node_parser import SentenceSplitter
 import json
 from datetime import datetime
 import uuid, math
@@ -63,6 +61,9 @@ def generate_collection_name(self) -> str:
         return "coll_" + uuid.uuid1().hex.lower()
 
     def split(self, path: str) -> List[Any]:
+        # lazy import packages which requires long time to load
+        from llama_index.core import SimpleDirectoryReader
+        from llama_index.core.node_parser import SentenceSplitter
 
         # load pdf file by path
         documents = SimpleDirectoryReader(

agents/ten_packages/extension/gemini_llm_python/gemini_llm_extension.py

@@ -14,7 +14,6 @@
     StatusCode,
     CmdResult,
 )
-from .gemini_llm import GeminiLLM, GeminiLLMConfig
 from .log import logger
 from .utils import get_micro_ts, parse_sentence
 
@@ -45,6 +44,10 @@ class GeminiLLMExtension(Extension):
 
     def on_start(self, ten: TenEnv) -> None:
         logger.info("GeminiLLMExtension on_start")
+
+        # lazy import packages which requires long time to load
+        from .gemini_llm import GeminiLLM, GeminiLLMConfig
+
         # Prepare configuration
         gemini_llm_config = GeminiLLMConfig.default_config()
 

agents/ten_packages/extension/llama_index_chat_engine/extension.py

@@ -14,13 +14,8 @@
     CmdResult,
 )
 from .log import logger
-from .astra_llm import ASTRALLM
-from .astra_retriever import ASTRARetriever
 import queue, threading
 from datetime import datetime
-from llama_index.core.chat_engine import SimpleChatEngine, ContextChatEngine
-from llama_index.core.storage.chat_store import SimpleChatStore
-from llama_index.core.memory import ChatMemoryBuffer
 
 PROPERTY_CHAT_MEMORY_TOKEN_LIMIT = "chat_memory_token_limit"
 PROPERTY_GREETING = "greeting"
@@ -79,6 +74,8 @@ def on_start(self, ten: TenEnv) -> None:
         self.thread.start()
 
         # enable chat memory
+        from llama_index.core.storage.chat_store import SimpleChatStore
+        from llama_index.core.memory import ChatMemoryBuffer
         self.chat_memory = ChatMemoryBuffer.from_defaults(
             token_limit=self.chat_memory_token_limit,
             chat_store=SimpleChatStore(),
@@ -204,9 +201,14 @@ def async_handle(self, ten: TenEnv):
 
                 logger.info("process input text [%s] ts [%s]", input_text, ts)
 
+                # lazy import packages which requires long time to load
+                from .astra_llm import ASTRALLM
+                from .astra_retriever import ASTRARetriever
+
                 # prepare chat engine
                 chat_engine = None
                 if len(self.collection_name) > 0:
+                    from llama_index.core.chat_engine import ContextChatEngine                    
                     chat_engine = ContextChatEngine.from_defaults(
                         llm=ASTRALLM(ten=ten),
                         retriever=ASTRARetriever(ten=ten, coll=self.collection_name),
@@ -229,6 +231,7 @@ def async_handle(self, ten: TenEnv):
                         ),
                     )
                 else:
+                    from llama_index.core.chat_engine import SimpleChatEngine
                     chat_engine = SimpleChatEngine.from_defaults(
                         llm=ASTRALLM(ten=ten),
                         system_prompt=(