diff --git a/python/0271-encode-and-decode-strings.py b/python/0271-encode-and-decode-strings.py
index ff02e079f..3d58a075b 100644
--- a/python/0271-encode-and-decode-strings.py
+++ b/python/0271-encode-and-decode-strings.py
@@ -1,6 +1,6 @@
 class Codec:
     def encode(self, strs):
-        return ''.join(map(lambda s: str(len(s)) + '#' + s, strs))
+        return ''.join(map(lambda s: f"{len(s)}#{s}", strs))
 
     def decode(self, s):
         res = []