add time module

csst_common/data_manager.py

@@ -34,6 +34,7 @@ from csst_dfs_api.sls.level2spectra import Level2SpectraApi as SlsLevel2DataApi
 from .logger import get_logger
 from .params import CSST_PARAMS as CP
 from .params import DFS_CONF
+from .time import now, now_dfs
 
 
 class CsstMsDataManager:
@@ -289,8 +290,11 @@ class CsstMsDataManager:
 
     @staticmethod
     def now():
-        """ Return ISOT8601 format datetime. """
-        return datetime.datetime.now().strftime('%Y-%m-%dT%H:%M:%S.%f')
+        return now()
+
+    @staticmethod
+    def now_dfs():
+        return now_dfs()
 
     # DFS APIs
     @property

csst_common/time.py

+import datetime
+
+
+def now():
+    """ Return ISOT8601 format datetime, for time stamps in data products. """
+    return datetime.datetime.now().strftime('%Y-%m-%dT%H:%M:%S.%f')
+
+
+def now_dfs():
+    """ Return ISOT8601 format datetime, for DFS usage only. """
+    return datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')