GitLab

* Add Flowers102 datasets

* Fix initialization of images and labels

* Fix _check_exists in Flowers102

* Add Flowers102 to datasets and docs

* Add Flowers102TestCase to unittest

* Fixing Python type statically

* Shuffle the fake labels

* Update test/test_datasets.py
Co-authored-by: Philip Meier <github.pmeier@posteo.de>

* Apply the suggestions by pmeier

* Use check_integrity to check file existence

* Save the labels to base_folder

* Minor fixes

* Using a loop makes this more concise without reducing readability
Co-authored-by: Philip Meier <github.pmeier@posteo.de>

* Using a loop makes this more concise without reducing readability
Co-authored-by: Philip Meier <github.pmeier@posteo.de>

* Remove self.labels and self.label_to_index attributes

* minor simplification

* Check the exitence of image folder

* Revert the check

* Check the existence of image folder

* valid -> val

* keep some stuff private

* minor doc arrangements

* remove default FEATURE_TYPES

* Simplify the datasets existence

* check if the image folder exists
Co-authored-by: Philip Meier <github.pmeier@posteo.de>

* isdir -> is_dir
Co-authored-by: Philip Meier <github.pmeier@posteo.de>
Co-authored-by: Nicolas Hug <nicolashug@fb.com>