一、虚拟环境 1、建立虚拟环境 python -m venv xxcdu 2、激活虚拟环境 windows： xxcdu/Scripts/activate linux：
1、格式化字符串：f”······“ first_name = Bili last_name = Halidon full_name = f"{first_name}{last_name}" print(f"Hello, {full_name.
