(ll_env) PS C:\Users\lenovo\iCloudDrive\Python\shuben\18\learning_log> cd C:\Users\lenovo\iCloudDrive\Python\shuben\18\18_4_pizza # 找个没用的文件夹18_4_pizza (ll_env) PS C:\Users\lenovo\iCloudDrive\Python\shuben\18\18_4_pizza> python -m venv piz_env # 建立虚拟环境 (ll_...