diff --git a/api/operation.py b/api/operation.py
index 92c8d67..53d1f45 100644
--- a/api/operation.py
+++ b/api/operation.py
@@ -1,6 +1,14 @@
 from psycopg.rows import dict_row
 from .connection import g_conn_dict as conn
 
+def _get_parents(name: str, id: int) -> list[int]:
+    ids = [id]
+    with conn[name].cursor(row_factory=dict_row) as cur:
+        while ids[-1] != 0:
+            cur.execute(f"select parent from operation where id = {ids[-1]}")
+            ids.append(int(cur.fetchone()['parent']))
+    return ids
+
 def _get_current_operation(name: str) -> int:
     with conn[name].cursor(row_factory=dict_row) as cur:
         cur.execute(f"select id from current_operation")
@@ -90,15 +98,6 @@ def take_snapshot(name: str, tag: str) -> None:
         parent = _get_current_operation(name)
         cur.execute(f"insert into snapshot_operation (id, tag) values ({curr}, '{tag}')")
 
-
-def _get_parents(name: str, id: int) -> list[int]:
-    ids = [id]
-    with conn[name].cursor(row_factory=dict_row) as cur:
-        while ids[-1] != 0:
-            cur.execute(f"select parent from operation where id = {ids[-1]}")
-            ids.append(int(cur.fetchone()['parent']))
-    return ids
-
 def pick_snapshot(name: str, tag: str) -> None:
     if tag == None or tag == '':
         print('Non empty tag is expected!')