I'd like to ask you to recall Python txt content in a row

import os

def show_directory(path):
    r = []
    path += '/'
    files = os.listdir(path)
    for file in files:
        filename = os.path.join(path, file)
        ext = os.path.splitext(filename)[-1]
        if ext == '.txt':
            r.append(path+file)
    return r

def show_file(filelist):
    for file in filelist:
        with open(file) as f:
            print(file)
            for i in f:
                print(i, end='\n\n')

if __name__ == "__main__":
    tmp = show_directory('./ans')
    show_file(tmp)