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Clarify ImageFolder sample ordering and indexing #9353

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Clarify ImageFolder sample ordering and indexing #9353

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Clarify ImageFolder sample ordering and indexing
yakshithkd23 Jan 25, 2026
a956b23
Merge branch 'main' into clarify-imagefolder-docs
zy1git Jan 28, 2026
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7 changes: 6 additions & 1 deletion torchvision/datasets/folder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -310,10 +310,15 @@ class ImageFolder(DatasetFolder):
allow_empty(bool, optional): If True, empty folders are considered to be valid classes.
An error is raised on empty folders if False (default).

Attributes:
Attributes:
classes (list): List of the class names sorted alphabetically.
class_to_idx (dict): Dict with items (class_name, class_index).
imgs (list): List of (image path, class_index) tuples
Notes:
- Samples are sorted alphabetically by class name and file name.
- All samples from all classes are concatenated into a single list.
Indexing the dataset (e.g. dataset[i]) accesses this global list,
not a per-class subset.
"""

def __init__(
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