[cherry-pick]fix fleetutil get_online_pass_interval bug3 (#60620)

* fix fleetutil get_online_pass_interval bug3; test=develop

* fix fleetutil get_online_pass_interval bug3; test=develop

* fix fleetutil get_online_pass_interval bug3; test=develop

Author: danleifeng

python/paddle/incubate/distributed/fleet/fleet_util.py

@@ -18,6 +18,7 @@
 import logging
 import math
 import os
+import re
 import sys
 import time
 
@@ -1317,25 +1318,12 @@ def get_online_pass_interval(
                 ...     is_data_hourly_placed=False)
 
         """
-        assert (
-            "|" not in days
-            and ";" not in days
-            and "\\" not in days
-            and "/" not in days
-            and "(" not in days
-            and ")" not in days
-            and "&" not in days
-        ), r"days should not contain [|,;,\,/,(,),&]"
+        pattern = r'^\d+|{[0-9]+}|{[0-9]+\.\.[0-9]+}$'
+        if not re.fullmatch(pattern, str(days)):
+            raise Exception("days format is not right")
         days = os.popen("echo -n " + days).read().split(" ")
-        assert (
-            "|" not in hours
-            and ";" not in hours
-            and "\\" not in hours
-            and "/" not in hours
-            and "(" not in hours
-            and ")" not in hours
-            and "&" not in hours
-        ), r"hours should not contain [|,;,\,/,(,),&]"
+        if not re.fullmatch(pattern, str(hours)):
+            raise Exception("hours format is not right")
         hours = os.popen("echo -n " + hours).read().split(" ")
         split_interval = int(split_interval)
         split_per_pass = int(split_per_pass)