use iso 8601 format time stamp

csst_common/data_manager.py

@@ -13,23 +13,23 @@ Modified-History:
     2022-11-06, Bo Zhang, deleted CsstMbiDataManager
     2022-11-20, Bo Zhang, added DFS APIs
 """
-import _io
+import datetime
 import glob
 import os
 import re
 from typing import Union
 
 import numpy as np
-from astropy.io import fits
 from astropy import time
+from astropy.io import fits
 from astropy.table import Table
+from csst_dfs_api.common.catalog import CatalogApi
 from csst_dfs_api.facility.level0 import Level0DataApi
 from csst_dfs_api.facility.level0prc import Level0PrcApi
 from csst_dfs_api.facility.level1 import Level1DataApi
 from csst_dfs_api.facility.level1prc import Level1PrcApi
 from csst_dfs_api.mbi.level2 import Level2DataApi as MbiLevel2DataApi
 from csst_dfs_api.sls.level2spectra import Level2SpectraApi as SlsLevel2DataApi
-from csst_dfs_api.common.catalog import CatalogApi
 
 from .logger import get_logger
 from .params import CSST_PARAMS as CP
@@ -262,7 +262,11 @@ class CsstMsDataManager:
     def write_stamp(self):
         if self.stamps is not None and not self.stamps == "":
             with open(self.stamps, "a+") as f:
-                f.write(f"{time.Time.now().isot}\n")
+                f.write(f"{time.Time.now().isot.replace('.', ',')}+0800\n")
+
+    @staticmethod
+    def now():
+        return datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
 
     # DFS APIs
     @property