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Photograph of a row of sealed glass jars on a windowsill, each holding a different set of tools, with blank paper labels

ModuleNotFoundError, but it works on my machine? Virtual environments, pip and uv

Your AI-written Python script runs for you and crashes for everyone else. The cause is almost always the same: packages installed in the wrong place. Here is what a virtual environment fixes, what uv changes, and when plain pip is still fine.

Aliteq Team · 14h ago · 9 min