Project-MONAI/MONAI

Print what package should be installed when suitable writer is missing

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#7,980 opened on Aug 1, 2024

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 (14 comments) (1 reaction) (0 assignees)Python (888 forks)batch import
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Description

Is your feature request related to a problem? Please describe. I used SaveImage(..., output_ext=".png") but got this error message

monai.utils.module.OptionalImportError: No ImageWriter backend found for png.

This was after pip install monai in a clean environment.

Describe the solution you'd like It would be great if the error message would include a description of how to fix the issue, e..g. "Please install pillow". Initially I installed simpleitk which also didn't have the png writer apparently, and I got the same error.

Describe alternatives you've considered n/a

Additional context Happened with monai==1.3.2

Contributor guide

Research direction
Locate the error message 'No ImageWriter backend found for png.' in the codebase and modify it to suggest installing the appropriate package (e.g., 'pillow' for PNG). Check which packages are registered for various image formats.
Tech stack
python
Domain
machine learningai
Issue type
Feature
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.
Under 1 hour
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
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80