错误原因：shell 打开失败，导致 conda activate 失败，没有环境，自然没有 numpy

解决：
在 settings.json 中加入：

	"terminal.integrated.profiles.windows":{
        "PowerShell": {
            "source": "PowerShell",
            "icon": "terminal-powershell"
        },
        "Command Prompt": {
            "path": [
                "${env:windir}\\Sysnative\\cmd.exe",
                "${env:windir}\\System32\\cmd.exe"
            ],
            "args": [],
            "icon": "terminal-cmd"
        },
        "Git Bash": {
            "source": "Git Bash"
        }
    },
    "terminal.integrated.defaultProfile.windows":"Command Prompt"