Python

Python environments, data handling, imports and runtime errors.

50 troubleshooting guides · Page 3 / 3

49. Why do all rows of a Python matrix change when I edit one cell?

    The expression `[[0] * width] * height` repeats references to one inner list. It does not create independent rows.

50. Why do relative imports fail when I run a package file directly?

    A file executed directly may have no parent-package context, so imports such as `from .helpers import parse` cannot resolve as intended.

Ask your own question · Sign in to post questions and answers.