How to Execute Multiple Python Files in the Same Interactive Prompt on VS Code

Discover how to solve the `NameError` issue in Visual Studio Code by configuring your interactive windows for seamless Python file execution.
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Mastering Python Execution in VS Code: A Guide for New Users

Transitioning from one integrated development environment (IDE) to another can be challenging, especially when the new environment operates differently. If you are moving from Spyder to Visual Studio Code (VS Code), you may encounter some inconveniences, particularly relating to executing multiple Python files seamlessly in an interactive prompt. This guide will guide you through resolving a common issue: the NameError that occurs when attempting to use objects from a previously run Python file.

The Problem: NameError Exception

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This issue stems from the fact that each Python file execution starts in its own context, thereby not recognizing variables defined in previously executed files in a new interactive window.

The Solution: Configuring VS Code for Multiple Interactive Windows

Step 1: Check the Setting for Interactive Window Creation Mode

The first step to resolve this issue is to check the configuration setting in your VS Code environment. You need to ensure that the "Jupyter Interactive Window: Creation Mode" is set to "multiple" rather than "perfile". Here's how to do this:

Open your VS Code.

Go to Settings: You can access settings by pressing Ctrl + , (or Cmd + , on macOS). Alternatively, you can go to the gear icon (⚙️) in the lower left and choose Settings.

Search for Interactive Window Creation Mode: In the search bar, type "Jupyter > Interactive Window: Creation Mode".

Change the Setting: If it's set to "perfile", click on it and change it to "multiple".

Step 2: Try Running Your Code Again

The interactive windows should behave more intuitively, recognizing shared variables between executions.

Step 3: Future Use Cases - Running Code in Parallel

Once you're comfortable executing code between two files, you might want to explore parallel execution. VS Code supports opening several interactive windows, making it possible to run different scripts simultaneously. You can open additional windows and evaluate selected code in any active window.

Conclusion

Configuring your VS Code to handle multiple Python file executions in the same interactive prompt not only resolves errors like NameError, but also streamlines your workflow. By ensuring the appropriate settings are in place, you can transition smoothly from Spyder and fully utilize the capabilities of VS Code.

Next time you’re coding, remember these steps to maintain a seamless coding experience as you execute multiple scripts. Happy coding!