Yet, here you are. Your pyproject.toml is pristine. poetry install runs without a hitch. The script executes perfectly when you type poetry run python script.py . But in your editor, the squiggly red lines are mocking you.
Introduction: The Perfect Storm of Modern Python Development You’ve embraced modern Python development. You use Poetry for dependency management and virtual environments because you’re tired of the requirements.txt chaos. You use VS Code with Pylance because you want blazing-fast type checking and autocompletion. pylance missing imports poetry hot
Your code is clean. Your types are checked. Your imports are resolved. Yet, here you are
This article is the definitive guide to understanding why this happens and, more importantly, how to fix it permanently. Before typing random commands, it’s crucial to understand why this breakage occurs. Pylance is a static type checker. It needs to know the exact Python interpreter and site-packages path to validate your imports. Poetry, by default, is "non-intrusive." It creates virtual environments in a cache directory (e.g., ~/Library/Caches/pypoetry/virtualenvs/ on macOS or %APPDATA%\pypoetry\virtualenvs on Windows). The script executes perfectly when you type poetry
Open the VS Code Command Palette ( Cmd+Shift+P on macOS, Ctrl+Shift+P on Windows/Linux).
Ensure your pyproject.toml includes your project package correctly: