class5_os

    import os
    # current dir
    # 八  斜杠和反斜杠可以通过八字来记
    print(os.getcwd()) # 当前路径
    print(os.chdir(r"D:\PycharmProjects\auto_office")) # 改变路径
    print(os.getlogin()) # 当前账户名称
    print(os.cpu_count()) # cpu数量
    
    print(os.path.abspath('os_demo.py'))  # 获取绝对路径  文件名
    
    current_path = os.path.dirname(__file__)  # dirname 文件夹名字
    print(current_path)
    parrent_path = os.path.dirname(current_path)  # 参数的上级目录
    print(parrent_path)
    
    str_list = ["你", "好"]
    print("".join(str_list))
    
    print(os.path.join(parrent_path, "img")) # 拼接路径
    print(parrent_path + "/