Refactor regex parenthesis removal into a function

parser.py

@@ -6,9 +6,9 @@ from re import sub
 from pandas import DataFrame, read_html, Series
 
 
-def find_html_files(path) -> List:
-    file_list = glob(path + "/*fastqc.html")
-    return file_list
+def remove_parenthesis(identifier):
+    sequence_str = "".join(map(str, identifier))
+    return sub(r"[()]", "", sequence_str)
 
 
 def extract_adapters(files) -> Tuple[Series, List]:
@@ -36,8 +36,7 @@ def preprocess_dataframe(adapters) -> Series:
 def save_to_file(filename, adapters) -> None:
     with open(filename, "w") as f:
         for index, value in adapters.iteritems():
-            sequence_str = "".join(map(str, index))
-            sequence_id = sub(r"[()]", "", sequence_str)
+            sequence_id = remove_parenthesis(index)
             fasta_entry = f">{sequence_id}\n{value}\n"
             f.write(fasta_entry)
 
@@ -51,7 +50,7 @@ def parse_arguments():
 
 def main():
     args = parse_arguments()
-    file_list = find_html_files(args.input)
+    file_list = glob(args.input + "/*fastqc.html")
     adapters, stats = extract_adapters(file_list)
     save_to_file(args.output, adapters)
     print(