From 92b221aa105afe8cb581a29c108272223458c28d Mon Sep 17 00:00:00 2001
From: Anze <anze@grafolean.com>
Date: Sun, 8 May 2022 22:01:34 +0200
Subject: [PATCH] Fix: f-strings might not be supported

---
 netflow/v9.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/netflow/v9.py b/netflow/v9.py
index 4723313..adfd169 100644
--- a/netflow/v9.py
+++ b/netflow/v9.py
@@ -222,7 +222,7 @@ def __init__(self, data, template):
             elif flen == 1:
                 struct_format += 'B'
             else:
-                struct_format += f'{flen}s'
+                struct_format += '%ds' % flen
             struct_len += flen
 
         while offset <= (self.length - padding_size):