vyperlang/vyper

Improve error message for `math` namespace collision

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#4,579 opened on Apr 14, 2025

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Easy Pickingsbug - UXhelp wanted

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Description

The following snippet will throw with

from snekmate.utils import math
import math

vyper.exceptions.NamespaceCollision: 'math' has already been declared as a ModuleInfo(module_t=venv/Lib/site-packages/snekmate/utils/math.vy, alias='math', ownership=<ModuleOwnership.NO_OWNERSHIP: 'no_ownership'>, ownership_decl=None)

  contract "test.vy:2", line 2:0
       1 from snekmate.utils import math
  ---> 2 import math
  -------^
       3

You must run it via vyper test.vy --enable-decimals.

Contributor guide

Research direction
Find where the namespace collision error is raised in the Vyper compiler source and improve the message to include suggestions for resolving the conflict, such as renaming the imported module or using an alias.
Tech stack
python
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonVyper
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70