do not clear dir_l1 in this stage

csst_common/data_manager.py

@@ -579,18 +579,24 @@ class CsstMsDataManager:
         pass
 
     @staticmethod
-    def from_dfs(obs_id="100000100", datatype="mbi", dir_l0="/L1Pipeline/L0", dir_l1="/L1Pipeline/L1",
-                 dfs_mode=True, dfs_node="pml"):
+    def from_dfs(
+            obs_id="100000100",
+            datatype="mbi",
+            dir_l0="/L1Pipeline/L0",
+            dir_l1="/L1Pipeline/L1",
+            dfs_mode=True,
+            dfs_node="pml"
+    ):
         """ Initialize CsstMsDataManager from DFS. """
         # (clear and) make directories
         if os.path.exists(dir_l0):
             os.system(f"rm -rf {dir_l0}/*")
         else:
             os.mkdir(dir_l0)
-        if os.path.exists(dir_l1):
-            os.system(f"rm -rf {dir_l1}/*")
-        else:
-            os.mkdir(dir_l1)
+        # if os.path.exists(dir_l1):
+        #     os.system(f"rm -rf {dir_l1}/*")
+        # else:
+        #     os.mkdir(dir_l1)
         os.chdir(dir_l1)
 
         print(f"Query obs_id={obs_id} ...", end="")