diff --git a/tools.py b/tools.py
index c47e9cd..c277cc6 100644
--- a/tools.py
+++ b/tools.py
@@ -1,3 +1,4 @@
+import datetime
 import inspect
 import os.path
 import sys
@@ -23,3 +24,21 @@ def get_script_dir(follow_symlinks=True):
 def compare(a: Any, b: Any) -> int:
     """compare to values, return -1 if a is smaller than b, 1 if a is greater than b, 0 is both are equal"""
     return bool(a > b) - bool(a < b)
+
+
+def human_readable_time_from_delta(delta: datetime.timedelta) -> str:
+    time_str = ""
+    if delta.days > 0:
+        time_str += "%d days, " % delta.days
+
+    if delta.seconds > 3600:
+        time_str += "%02d:" % (delta.seconds // 3600)
+    else:
+        time_str += "00:"
+
+    if delta.seconds % 3600 > 60:
+        time_str += "%02d:" % (delta.seconds % 3600 // 60)
+    else:
+        time_str += "00:"
+
+    return time_str + "%02d" % (delta.seconds % 60)