import pandas as pdimport osif __name__ == '__main__':    Path = 'c:\checklog'    dfs = []    for dir_path, dir_names, file_names in os.walk(Path):        for f in file_names:            dfs.append(pd.read_csv(os.path.join(dir_path, f), header=None))    df = pd.concat(dfs, sort=False)    df.to_excel('c:\checklog\out.xlsx')