Tensorflow 2 flower_photos花卉数据集手动下载、离线安装、本地加载、快速读取
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查看数据集列表：
flower_photos手动下载，Link:
data_root = tf.keras.utils.get_file(
'flower_photos','https://storage.googleapis.com/download.tensorflow.org/example_images/flower_photos.tgz',
离线安装步骤
复制到：
C:\Users\DFKJ3\.keras\datasets
解压:
解压到当前文件夹
读取：
>>> image_generator = tf.keras.preprocessing.image.ImageDataGenerator(rescale=1/255)
>>> image_data = image_generator.flow_from_directory(str(data_root), target_size=IMAGE_SHAPE)
Found 3670 images belonging to 5 classes.
商务合作，科技咨询，版权转让：向日葵，135—4855__4328，xiexiaokui#qq.com