Improve torchvision mismatch ImportError guidance

[danielhanchen]

Summary

• improve the torch/torchvision mismatch error message with an actionable upgrade command
• include pip install --upgrade "torchvision>=<required_version>" directly in the message
• keep compatibility-check behavior unchanged (stable mismatches still raise, prerelease/custom builds still warn)

Why

The previous message correctly explained the mismatch but did not provide a direct remediation command. This update makes the error immediately actionable.

Validation

• local runtime sanity check in current environment (torch==2.10.0+cu130, torchvision==0.24.1) confirms the raised ImportError now includes this command hint:

pip install --upgrade "torchvision>=0.25.0"

[gemini-code-assist]

Summary of Changes

Hello @danielhanchen, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the user experience when encountering torch/torchvision version mismatches by embedding a direct and actionable pip upgrade command within the ImportError message. This change aims to significantly reduce the time users spend debugging and resolving dependency issues by providing immediate guidance, without altering the existing compatibility validation logic.

Highlights

• Improved Error Message: The torch/torchvision mismatch ImportError now includes an actionable upgrade command.
• Direct Remediation: The error message directly suggests pip install --upgrade "torchvision>=<required_version>" to resolve the version incompatibility.
• Compatibility Behavior Unchanged: The underlying compatibility-check logic remains the same, with stable mismatches still raising errors and prerelease/custom builds issuing warnings.

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Changelog

• unsloth/import_fixes.py
  • Added an upgrade command to the torchvision compatibility error message.

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[gemini-code-assist]

Code Review

This pull request enhances the user experience by improving the error message for torch/torchvision version mismatches. It now includes a direct, actionable pip command to resolve the issue. The change is clear, correct, and well-implemented. I have no further suggestions. Great work!