From 1a58385c88ee7abe94f60f7d00175a34e1bfa7bd Mon Sep 17 00:00:00 2001
From: Alessandro Berti <alessandro.berti@fit.fraunhofer.de>
Date: Sun, 1 Dec 2024 08:54:07 +0100
Subject: [PATCH] backport regex patch

---
 pm4py/algo/filtering/common/traces/infix_to_regex.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pm4py/algo/filtering/common/traces/infix_to_regex.py b/pm4py/algo/filtering/common/traces/infix_to_regex.py
index 385547c0a..a8b43ca4d 100644
--- a/pm4py/algo/filtering/common/traces/infix_to_regex.py
+++ b/pm4py/algo/filtering/common/traces/infix_to_regex.py
@@ -1,3 +1,5 @@
+from re import escape
+
 def translate_infix_to_regex(infix):
     regex = "^"
     for i, act in enumerate(infix):
@@ -8,6 +10,9 @@ def translate_infix_to_regex(infix):
             else:
                 regex = f"{regex}([^,]*,)*"
         else:
+            if act: 
+                act = escape(act)
+            
             if is_last_activity:
                 regex = f"{regex}{act}"
             else: