from pathlib import Path def txt_to_df(str_txt): # TXTをDataframeに変換する、何らかの処理 return df txt_path = Path("./txt/") all_df = pd.DataFrame() for txt in txt_path.glob("*.txt"): str_txt = txt.read_text() df = txt_to_df(str_txt) all_df = pd.concat([all_df, df])