add python debug sample

Author: ChenTanyi

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Attach (Remote Debug)",
+      "type": "python",
+      "request": "attach",
+      "localRoot": "${workspaceRoot}",
+      "remoteRoot": "/app",
+      "port": 3000,
+      "secret": "my_secret",
+      "host": "localhost"
+    }
+  ]
+}

Dockerfile

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+FROM python:latest
+COPY ./ /app
+WORKDIR /app
+RUN apt-get update && \
+    apt-get install -y python-pip && \
+    pip install -v ptvsd==3.0.0
+
+CMD python hello.py

README.md

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+## Prerequisites
+
+* [Docker](https://www.docker.com/)
+* [Visual Studio Code](https://code.visualstudio.com/)
+* [Python Extension](https://marketplace.visualstudio.com/items?itemName=donjayamanne.python)
+
+## Build Docker Image
+
+```cmd
+docker build -t python-module .
+```
+
+## Run Docker Container
+
+```cmd
+docker run -d -p 3000:3000 --name python-test python-module
+```
+
+## Launch Debugger
+
+Open `PythonModuleDebug` in VS Code. Set up `Breakpoint` and press `F5`.
+
+## Known Bug
+
+The process would add one by one everytime restarting the debugger.

hello.py

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+import os
+import sys
+import time
+import ptvsd
+ptvsd.enable_attach("my_secret", address=('0.0.0.0', 3000))
+
+if __name__ == '__main__':
+  count = 0
+  while 1:
+    print('Hello {0}'.format(count))
+    count += 1
+    time.sleep(1)