for subdir_datewise in subdirs:
        if check_if_processed(subdir_datewise):
            print ("Skipping as trip already processed ", path)
            return
        process_data(subdir_datewise)
#TO FIX: open(os.path.join(parent_path,"preprocessed_files.txt") stores only 1 path
        with open("preprocessed_files.txt","a") as preprocessed_file:
            preprocessed_file.write(subdir_datewise  + "n")