Make preprocess_text static

chall.py

@@ -544,7 +544,7 @@ class Chall(GeneratorBasedBuilder):
         """
 
         clear_text = self.remove_annotations(raw_text)
-        clear_text = self.preprocess_text(clear_text)
+        clear_text = self.preprocess_text(clear_text, allowed_chars=self.config.allowed_chars)
 
         if self.config.num_to_words:
             clear_text = self.num_to_words(clear_text)
@@ -560,13 +560,15 @@ class Chall(GeneratorBasedBuilder):
 
         return clear_text
 
-    def preprocess_text(self, transcript: str) -> str:
+    @staticmethod
+    def preprocess_text(transcript: str, allowed_chars: set) -> str:
         """
         Preprocesses the text by removing words between brackets and parentheses,
         standardizing spaces before apostrophes, removing commas between digits,
         and replacing special characters.
 
         :param transcript: The input transcript to preprocess.
+        :param allowed_chars: Set of allowed chars
         :return: The preprocessed transcript with various text normalization applied.
         """
 
@@ -574,7 +576,7 @@ class Chall(GeneratorBasedBuilder):
         transcript = re.sub(r"\(([^)]+?)\)", "", transcript)  # remove words between parenthesis
         transcript = re.sub(r"\s+'", "'", transcript)  # standardize when there's a space before an apostrophe
         transcript = re.sub(r"(\d),(\d)", r"\1\2", transcript)  # remove commas between digits
-        if "." not in self.config.allowed_chars:
+        if "." not in allowed_chars:
             transcript = re.sub(r"\.([^0-9]|$)", r" \1", transcript)  # remove periods not followed by numbers
 
         # Replace special characters