Update app.py

app.py

@@ -194,19 +194,17 @@ def create_dictionary(word_list, word_dict = {}):
             word_dict[key].append(word)
     return word_dict
 
-def merge_lines(doc1, doc2, doc3, doc4):
-    docs = [doc1, doc2, doc3, doc4]
+def merge_lines(roman_file, w4w_file, full_mean_file, macaronic_file):
+    files = [roman_file, w4w_file, full_mean_file, macaronic_file]
     merged_lines = []
 
-    with open(doc1, "r") as f1, open(doc2, "r") as f2, \
-            open(doc3, "r") as f3, open(doc4, "r") as f4, \
-            open("merged_lines.txt", "w") as f_out:
+    with open(roman_file.name, "r") as f1, open(w4w_file.name, "r") as f2, \
+            open(full_mean_file.name, "r") as f3, open(macaronic_file.name, "r") as f4:
         for lines in zip(f1, f2, f3, f4):
             merged_line = "".join(line.strip() for line in lines)
-            f_out.write(merged_line + "\n")
             merged_lines.append(merged_line)
 
-    return merged_lines
+    return "\n".join(merged_lines)
 
 def TTSforListeningPractice(text):
 	return "not finished"