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doc: explain mechanism of validation data split of flow_from_directory #254

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3 changes: 2 additions & 1 deletion keras_preprocessing/image/image_data_generator.py
Original file line number Diff line number Diff line change
Expand Up @@ -504,7 +504,8 @@ def flow_from_directory(self,
follow_links: Whether to follow symlinks inside
class subdirectories (default: False).
subset: Subset of data (`"training"` or `"validation"`) if
`validation_split` is set in `ImageDataGenerator`.
`validation_split` is set in `ImageDataGenerator`. Files
will be split after sorting in alphanumeric order.
interpolation: Interpolation method used to
resample the image if the
target size is different from that of the loaded image.
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