(improvement)(Chat) Move python module from Chat To Headless (#823)

Co-authored-by: jolunoluo

headless/python/instances/chromadb_instance.py

@@ -0,0 +1,21 @@
+# -*- coding:utf-8 -*-
+from typing import Any, List, Mapping, Optional, Union
+
+import chromadb
+from chromadb.api import Collection
+from chromadb.config import Settings
+
+import os
+import sys
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+
+from config.config_parse import CHROMA_DB_PERSIST_PATH
+
+
+client = chromadb.Client(
+    Settings(
+        chroma_db_impl="duckdb+parquet",
+        persist_directory=CHROMA_DB_PERSIST_PATH,  # Optional, defaults to .chromadb/ in the current directory
+    )
+)