ubuntu linux下使用vscode切换python虚拟环境

VSCODE的桌面腳本是:

[Desktop Entry]
Version=1.0
Type=Application
Name=VSCODE
Comment=
Exec=/home/appleyuchi/下載/VSCode-linux-x64/bin/code
Icon=/home/appleyuchi/下載/VSCode-linux-x64/resources/app/resources/linux/code.png
Terminal=false
StartupNotify=false

请注意本文的讨论环境：

Ubuntu Linux 16.04 64位

在打开软件后，不关闭软件的情况下，切换python虚拟环境，使用的验证代码是：

import sys
print(sys.prefix)
print(sys.executable)

第一步：按下左边的纸张图标

第二步：选择launch.json

第三步，launch.json的内容如下：

{"version": "0.2.0","configurations": [{"name": "Python","type": "python","request": "launch","stopOnEntry": true,// "pythonPath": "${config:python.pythonPath}","pythonPath": "${config:python.pythonPath}",//    "pythonPath": "${config:python.pythonPath}","program": "${file}","cwd": "${workspaceRoot}","env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "PySpark","type": "python","request": "launch","stopOnEntry": true,"osx": {"pythonPath": "${env:SPARK_HOME}/bin/spark-submit"},"windows": {"pythonPath": "${env:SPARK_HOME}/bin/spark-submit.cmd"},"linux": {"pythonPath": "${env:SPARK_HOME}/bin/spark-submit"},"program": "${file}","cwd": "${workspaceRoot}","env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "Python Module","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","module": "module.name","cwd": "${workspaceRoot}","env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "Integrated Terminal/Console","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","program": "${file}","cwd": "","console": "integratedTerminal","env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit"]},{"name": "External Terminal/Console","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","program": "${file}","cwd": "","console": "externalTerminal","env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit"]},{"name": "Django","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","program": "${workspaceRoot}/manage.py","cwd": "${workspaceRoot}","args": ["runserver","--noreload","--nothreading"],"env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput","DjangoDebugging"]},{"name": "Flask","type": "python","request": "launch","stopOnEntry": false,"pythonPath": "${config:python.pythonPath}","program": "fully qualified path fo 'flask' executable. Generally located along with python interpreter","cwd": "${workspaceRoot}","env": {"FLASK_APP": "${workspaceRoot}/quickstart/app.py"},"args": ["run","--no-debugger","--no-reload"],"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "Flask (old)","type": "python","request": "launch","stopOnEntry": false,"pythonPath": "${config:python.pythonPath}","program": "${workspaceRoot}/run.py","cwd": "${workspaceRoot}","args": [],"env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "Pyramid","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","cwd": "${workspaceRoot}","env": {},"envFile": "${workspaceRoot}/.env","args": ["${workspaceRoot}/development.ini"],"debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput","Pyramid"]},{"name": "Watson","type": "python","request": "launch","stopOnEntry": true,"pythonPath": "${config:python.pythonPath}","program": "${workspaceRoot}/console.py","cwd": "${workspaceRoot}","args": ["dev","runserver","--noreload=True"],"env": {},"envFile": "${workspaceRoot}/.env","debugOptions": ["WaitOnAbnormalExit","WaitOnNormalExit","RedirectOutput"]},{"name": "Attach (Remote Debug)","type": "python","request": "attach","localRoot": "${workspaceRoot}","remoteRoot": "${workspaceRoot}","port": 3000,"secret": "my_secret","host": "localhost"}]
}

注意上面的重点是所有的pythonPath的值都必须是下面这个

"pythonPath": "${config:python.pythonPath}"

或者删除launch.json，然后重新启动让他自己建立。

第四步，vscode内部切换虚拟环境方法（注意，如果没有以上的设置，下面的虚拟环境切换操作很可能会失效。）：

下面是我向作者请教的过程：

https://github.com/Microsoft/vscode-python/issues/173#issuecomment-364661275

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