Localscope–Limit scope of Python functions for reproducible execution
localscope is a small Python package that disassembles functions to check if they access global variables they shouldn't. I wrote this a few years ago to detect scope bugs which are common in Jupyter notebooks. It's recently come in handy writing jax code (https://github.com/jax-ml/jax) because it requires pure functions. Thought I'd share.
In plain words
Localscope is a Python package that analyzes functions by disassembling their code to detect unwanted access to global variables. Originally created to catch scope bugs common in Jupyter notebooks, it proves particularly useful for writing JAX code, which requires pure functions with no external dependencies. The tool helps developers identify and fix scope-related issues that can compromise reproducibility and correctness.
written from the facts on this page · September 2026
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