random str

csst_dfs_commons/convert/date_utils.py

 from datetime import datetime
 import time
+import random
+import string
 
 def format_datetime(dt):
     return dt.strftime('%Y-%m-%d %H:%M:%S')
@@ -21,3 +23,11 @@ def format_time_ms(float_time):
 
 def str_to_datetime(str_time):
     return datetime.strptime(str_time.split('.')[0], '%Y-%m-%d %H:%M:%S')
+
+def rand_str(str_len = 4):
+    letters = string.digits
+    result_str = ''.join(random.choice(letters) for i in range(str_len))
+    return result_str
+
+def rand_time_str(postfix_str_len = 4):
+    return format_compact_datetime(datetime.now()) + rand_str(postfix_str_len)
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