How To Debug Python Code In Visual Studio Code (VSCode)

Published: 17 October 2023
on channel: Applied Programming Tips & Tricks
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How To Debug Python Code In Visual Studio Code (VSCode)

1. **Install Python Extension**: If you haven't already, install the Python extension for VS Code. You can do this from the Extensions view by searching for "Python."

2. **Open Your Python Project**: Open the Python project you want to debug in VS Code.

3. **Create a Debug Configuration**:
Click on the gear icon in the Activity Bar on the side or use `Ctrl + Shift + D` to open the Run and Debug sidebar.
Click on the "create a launch.json file" link or select "Add Configuration" if you already have a `launch.json` file.

4. **Select Python Configuration**: In the list of available configurations, choose "Python."

5. **Configure Debug Settings**:
In the `launch.json` file, you can configure various settings, such as the Python interpreter, script to debug, and more. Here's a basic example:

```json
{
"version": "0.2.0",
"configurations": [
{
"name": "Python: Current File",
"type": "python",
"request": "launch",
"program": "${file}",
"console": "integratedTerminal"
}
]
}
```

You can modify this configuration as needed.

6. **Set Breakpoints**:
Open the Python file you want to debug.
Click in the gutter next to the line number to set a breakpoint. Alternatively, you can use the `F9` key.

7. **Start Debugging**:
Click the green "Start Debugging" button in the Run and Debug sidebar or press `F5`. This will start debugging your Python script.

8. **Debugging Actions**:
While debugging, you can use common debugging actions like step into (`F11`), step over (`F10`), continue (`F5`), and stop debugging (`Shift + F5`).

9. **Inspect Variables**:
Use the Variables panel to inspect the values of variables in your code.

10. **Watch Expressions**:
You can add watch expressions to monitor specific variables or expressions during debugging.

11. **Interactive Debugging**:
VS Code provides an interactive console in the Debug Console tab where you can run Python commands while debugging.

12. **Finish Debugging**:
When you're done debugging, you can stop the debugger by clicking the red square "Stop" button or using `Shift + F5`.

That's the basic process for debugging Python in Visual Studio Code. You can further customize your debugging experience by modifying the `launch.json` configuration to suit your specific needs.

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