enhance(client): use destructor instead of atexit

client/starwhale/api/_impl/data_store.py

@@ -2,7 +2,6 @@
 import re
 import sys
 import json
-import atexit
 import base64
 import struct
 import urllib
@@ -711,14 +710,16 @@ def get_instance() -> "LocalDataStore":
                 ensure_dir(ds_path)
 
                 LocalDataStore._instance = LocalDataStore(str(ds_path))
-                atexit.register(LocalDataStore._instance.dump)
             return LocalDataStore._instance
 
     def __init__(self, root_path: str) -> None:
         self.root_path = root_path
         self.name_pattern = re.compile(r"^[A-Za-z0-9-_/ ]+$")
         self.tables: Dict[str, MemoryTable] = {}
 
+    def __del__(self) -> None:
+        self.dump()
+
     def update_table(
         self,
         table_name: str,
@@ -1018,7 +1019,6 @@ def __init__(self, table_name: str, key_column: str = "id") -> None:
         self.data_store = get_data_store()
         self.cond = threading.Condition()
         self.setDaemon(True)
-        atexit.register(self.close)
         self.start()
 
     def __enter__(self) -> Any:
@@ -1027,10 +1027,12 @@ def __enter__(self) -> Any:
     def __exit__(self, type: Any, value: Any, tb: Any) -> None:
         self.close()
 
+    def __del__(self) -> None:
+        self.close()
+
     def close(self) -> None:
         with self.cond:
             if not self.stopped:
-                atexit.unregister(self.close)
                 self.stopped = True
                 self.cond.notify()
         self.join()