pyenv + virtualenv not working - use pyenv activate for all
  • 21-May-2023
Lightrun Team
Author Lightrun Team
pyenv + virtualenv not working - use pyenv activate for all

pyenv + virtualenv not working – use pyenv activate for all

Lightrun Team
Lightrun Team

Explanation of the problem

The user provides detailed information about their environment, including the version of VS Code, the extension used (vscode-python), the operating system (Ubuntu 16.04LTS), and the type of virtual environment (pyenv) being utilized. They explain the expected behavior, which involves listing all the Python versions under ~/.pyenv correctly, including those created with pyenv+virtualenv. They note that the correct activation command for pyenv+virtualenv environments is “pyenv activate mycoolapp”. However, they observe that VS Code uses a different command for venv environments (“source /home/mortenb/.pyenv/versions/mycoolapp/bin/activate”) and suggest that it should instead use “pyenv activate” for consistency. They provide examples of the correct activation commands and highlight the benefits of using pyenv for version control.

In the provided technical description, the user emphasizes the importance of supporting pyenv and requests that VS Code continues to support this technology. They express their satisfaction with the capabilities of pyenv, which allows them to manage full Python versioning control within Docker containers by using a single build parameter. They mention using a tagged container as a base for all Python projects within their company, making regression testing and upgrading a streamlined process. The user provides a link to a GitHub gist that demonstrates the ease of version management with pyenv and expresses their appreciation for the continued support of this technology.

In summary, the user describes their environment, highlighting the use of pyenv for virtual environment management. They explain the expected behavior and suggest that VS Code should use “pyenv activate” consistently for all environments. The user shares their positive experience with pyenv, which enables them to efficiently manage Python versioning within Docker containers. They emphasize the convenience and benefits of this approach and express their gratitude for the ongoing support of pyenv.

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Problem solution for pyenv + virtualenv not working – use pyenv activate for all

The provided answers suggest a solution for resolving the issue at hand. By adding the setting “python.terminal.activateEnvironment”: false to the user’s configuration settings, the problem is resolved. This configuration change disables the automatic activation of the Python environment in the terminal, potentially addressing any conflicts or errors related to the environment activation process. It is worth noting that after making this configuration change, restarting the environment or application may be necessary to ensure the changes take effect. Overall, this solution offers a straightforward approach to resolving the problem and has been reported as successful by the community.

In summary, the aggregated answer to the question is to add the setting “python.terminal.activateEnvironment”: false to the user’s configuration settings. This modification disables the automatic activation of the Python environment in the terminal and has proven effective in resolving the issue for many users. It is important to note that a restart may be required to ensure the changes take effect. By implementing this configuration change, users can mitigate any conflicts or errors associated with the environment activation process.


Other popular problems with Microsoft VS Code

Problem: Microsoft VS Code

One of the most common problems faced by Microsoft Visual Studio Code (VSCode) users is slow performance. This can be due to a variety of reasons such as large workspace size, extensions installed, or insufficient memory and CPU allocation.


To resolve this issue, users can try optimizing their workspace by removing unused files, limiting the number of extensions installed, and adjusting the CPU and memory settings in the User Settings. Upgrading to the latest version of VSCode and ensuring that the system has the recommended hardware specifications can also help improve performance.

Problem: Extension Compatibility Issues

Another common issue faced by VSCode users is compatibility issues with extensions. This occurs when an extension is not compatible with the version of VSCode or when it conflicts with another extension.


To resolve this issue, users can try uninstalling and reinstalling the conflicting extension, updating both VSCode and the extensions to the latest version, or disabling extensions one by one to determine which one is causing the issue. If the problem persists, users can report it to the extension developers or seek support from the VSCode community.

Problem: Debugging Issues

Debugging is a crucial aspect of software development, and debugging issues in VSCode can cause significant frustration for users. This can be due to incorrect configuration of the debugger, outdated debug adapters, or compatibility issues with the target runtime.


To resolve debugging issues, users can ensure that the debugger is properly configured and that the debug adapter is up-to-date. They can also try switching to a different debugger or updating the target runtime to ensure compatibility with VSCode. If the problem persists, users can seek support from the VSCode community or the debugger provider.

A brief introduction to Microsoft VS Code

Microsoft Visual Studio Code (VSCode) is a source code editor developed by Microsoft for Windows, macOS, and Linux. It is built on the Electron framework and utilizes the Monaco editor. VSCode is designed to be a lightweight and fast code editor that can handle a wide range of programming languages and development scenarios. It supports features such as syntax highlighting, code completion, and debugging, making it an excellent tool for developers.

VSCode also has an extensive ecosystem of extensions, which can be easily installed from the Visual Studio Code Marketplace. These extensions provide a wide range of functionalities, from additional programming languages and themes to advanced debugging tools and code refactoring. The ability to customize and extend VSCode with extensions makes it a flexible and adaptable code editor that can meet the needs of developers across a wide range of projects and programming languages. Additionally, VSCode has a rich API, making it easy for developers to create their own extensions and customize their development experience.

Most popular use cases for Microsoft VS Code

  1. Source Code Editing: Microsoft Visual Studio Code (VSCode) is primarily designed for editing source code. It supports a wide range of programming languages including, but not limited to, JavaScript, TypeScript, Python, Java, and C++. VSCode provides advanced code editing features such as syntax highlighting, code completion, and code snippets, making it an efficient tool for writing and editing code.
  2. Debugging: VSCode includes a powerful debugging interface that supports debugging applications in multiple languages and environments. This includes features such as breakpoints, call stacks, and a console for interaction with the application being debugged. The ability to debug code directly within the editor makes it easier for developers to identify and fix issues, speeding up their development process.
  3. Integrating with External Tools: VSCode provides the ability to integrate with external tools such as version control systems, build systems, and task runners. For example, the following code block demonstrates integrating with Git using the GitLens extension:
# Example of using GitLens with Visual Studio Code

# To install the GitLens extension, open the command palette (Ctrl+Shift+P) and run the following command:
# ext install eamodio.gitlens

# Once installed, GitLens provides a range of functionalities for working with Git repositories, including:
# - CodeLens annotations for Git blame information
# - Inline blame annotations
# - File and line-level blame annotations
# - Visual Git blame annotations in the gutter
# - Quick actions for stash, reset, and more
# - Improved Git conflict editor
# - And more...

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