bayesflow-org/bayesflow

[FEATURE] `Adapter.reshape()`

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#508 opened on Jun 11, 2025

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featuregood first issueuser interface

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Description

Feature Description Very frequently, users have to change the shape of their simulation outputs as part of the configuration for generating the right data for training the approximator. Therefore, reshape() would be a great feature to have for the Adapter.

A (very rough) example usage is provided as below:

sim = {"x": np.arange(6)}

adapter = (
    bf.adapters.Adapter()
    # ...
    .reshape("x", to_shape=(3, 2))
    # ...
)

Contributor guide

Research direction
Study the existing Adapter class methods (e.g., .concatenate, .select) to understand the pattern, then implement a .reshape method that wraps numpy.reshape or similar, ensuring it works within the adapter's pipeline.
Tech stack
python
Domain
machine learningdata
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.
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
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65