锟斤拷锟斤拷位锟矫ｏ拷锟斤拷页 > 锟斤拷锟斤拷锟教筹拷 > 锟教筹拷 > 锟斤拷锟斤拷锟剿癸拷锟斤拷锟斤拷模锟酵伙拷锟斤拷锟斤拷TFDS锟斤拷Keras锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟剿癸拷锟斤拷锟斤拷模锟酵伙拷锟斤拷锟斤拷TFDS锟斤拷Keras锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷|锟斤拷时锟戒：2024-11-05 09:45:50 |锟斤拷锟侥讹拷锟斤拷111锟斤拷|锟斤拷锟斤拷签锟斤拷 a T 锟斤拷锟斤拷锟斤拷锟斤拷 K S 锟斤拷锟斤拷锟斤拷锟斤拷锟剿癸拷锟斤拷锟剿癸拷锟斤拷锟斤拷锟斤拷 |锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷戏

锟斤拷一篇锟斤拷锟斤拷锟斤拷锟捷癸拷锟斤拷师锟斤拷转锟斤拷锟剿癸拷锟斤拷锟杰革拷位锟斤拷锟斤拷锟斤拷时锟斤拷通锟斤拷锟斤拷锟斤拷锟皆ｏ拷锟斤拷锟节斤拷锟斤拷锟斤拷锟斤拷锟斤拷探锟斤拷 TensorFlow 锟结供锟侥关硷拷锟斤拷锟竭和凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模锟酵的癸拷锟斤拷锟斤拷训锟斤拷锟斤拷锟斤拷锟街达拷锟剿癸拷锟斤拷锟杰匡拷锟斤拷校锟絋ensorFlow 锟斤拷锟斤拷锟捷硷拷锟接匡拷 (TensorFlow Datasets, 锟斤拷锟� TFDS) 锟斤拷 Kera

构建人工智能模型基础：TFDS和Keras的完美搭配

锟斤拷一篇锟斤拷锟斤拷锟斤拷锟捷癸拷锟斤拷师锟斤拷转锟斤拷锟剿癸拷锟斤拷锟杰革拷位锟斤拷锟斤拷锟斤拷时锟斤拷通锟斤拷锟斤拷

锟斤拷锟皆ｏ拷 锟斤拷锟节斤拷锟斤拷锟斤拷锟斤拷锟斤拷探锟斤拷 TensorFlow 锟结供锟侥关硷拷锟斤拷锟竭和凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模锟酵的癸拷锟斤拷锟斤拷训锟斤拷锟斤拷锟斤拷锟街达拷锟剿癸拷锟斤拷锟杰匡拷锟斤拷校锟絋ensorFlow 锟斤拷锟斤拷锟捷硷拷锟接匡拷 (TensorFlow Datasets, 锟斤拷锟� TFDS) 锟斤拷 Keras 模锟酵匡拷为锟斤拷锟窖帮拷锟斤拷锟斤拷峁╋拷思锟斤拷锟侥憋拷锟斤拷锟斤拷锟斤拷锟铰斤拷锟斤拷锟斤拷展示锟斤拷锟绞癸拷锟� TFDS 锟斤拷 Keras 锟斤拷瞎锟斤拷锟斤拷锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷实锟街革拷效锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷模锟斤拷训锟斤拷锟斤拷通锟斤拷锟斤拷锟节碉拷实锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟秸达拷锟斤拷锟捷硷拷锟截★拷预锟斤拷锟斤拷锟斤拷模锟酵搭建锟侥猴拷锟斤拷锟斤拷锟教ｏ拷为锟斤拷一锟斤拷锟斤拷锟剿癸拷锟斤拷锟斤拷模锟斤拷锟叫凤拷锟届定锟斤拷实锟侥伙拷锟斤拷锟斤拷

使锟斤拷TFDS锟斤拷Keras模锟斤拷

锟斤拷锟斤拷一锟斤拷锟叫ｏ拷锟斤拷锟斤拷学锟斤拷锟斤拷锟斤拷锟绞癸拷锟絋ensorFlow锟斤拷Keras锟斤拷锟斤拷一锟斤拷锟津单的硷拷锟斤拷锟斤拷泳锟侥ｏ拷停锟绞癸拷锟終eras锟斤拷锟矫碉拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷Fashion MNIST锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷

mnist = tf.keras.datasets.fashion_mnist

(training_images, training_labels), (test_images, test_labels) = mnist.load_data()

使锟斤拷TFDS时锟斤拷锟斤拷锟斤拷浅锟斤拷锟斤拷疲锟斤拷锟斤拷锟揭恍┬★拷谋浠拷锟終eras锟斤拷锟斤拷锟捷硷拷直锟接革拷锟斤拷锟角凤拷锟斤拷锟剿匡拷锟斤拷锟斤拷model.fit锟斤拷原锟斤拷使锟矫碉拷ndarray锟斤拷锟酵ｏ拷锟斤拷使锟斤拷TFDS时锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷一些转锟斤拷锟斤拷

(training_images, training_labels), (test_images, test_labels) = tfds.as_numpy(tfds.load('fashion_mnist', split=['train', 'test'], batch_size=-1, as_supervised=True))

锟斤拷锟斤拷锟斤，锟斤拷锟斤拷使锟斤拷锟斤拷tfds.load锟斤拷锟斤拷fashion_mnist锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷菁锟斤拷锟斤拷莞锟斤拷锟斤拷锟斤拷锟斤拷锟街拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷训锟斤拷锟斤拷锟酵诧拷锟皆硷拷锟侥伙拷锟街ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫达拷锟斤拷锟斤拷些锟斤拷锟斤拷锟筋将锟斤拷锟截帮拷锟斤拷图锟斤拷捅锟角╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椤Ｊ癸拷锟絫fds.as_numpy锟节碉拷锟斤拷tfds.load时锟结将锟斤拷锟捷凤拷锟斤拷为Numpy锟斤拷锟介。指锟斤拷batch_size=-1锟斤拷锟斤拷锟斤拷锟角伙拷取锟斤拷锟斤拷锟斤拷锟捷ｏ拷锟斤拷as_supervised=True锟斤拷确锟斤拷锟斤拷锟截的革拷式为锟斤拷锟斤拷锟诫，锟斤拷签锟斤拷元锟介。

锟斤拷锟斤拷锟叫╋拷锟斤拷锟斤拷锟斤拷锟斤拷腔锟斤拷锟斤拷匣锟斤拷锟斤拷锟斤拷Keras锟斤拷锟捷硷拷锟斤拷同锟斤拷锟斤拷锟捷革拷式锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟金—★拷锟斤拷TFDS锟叫ｏ拷锟斤拷锟捷碉拷锟斤拷状锟斤拷(28, 28, 1)锟斤拷锟斤拷锟斤拷Keras锟斤拷锟捷硷拷锟斤拷锟斤拷(28, 28)锟斤拷

锟斤拷锟斤拷味锟脚达拷锟斤拷锟斤拷要锟斤拷一些小锟侥改讹拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟捷碉拷锟斤拷状为(28, 28, 1)锟斤拷锟斤拷锟斤拷锟斤拷(28, 28)锟斤拷

import tensorflow as tf

import tensorflow_datasets as tfds

(training_images, training_labels), (test_images, test_labels) = tfds.as_numpy(tfds.load('fashion_mnist', split=['train', 'test'], batch_size=-1, as_supervised=True))

training_images = training_images / 255.0

test_images = test_images / 255.0

model = tf.keras.models.Sequential([

tf.keras.layers.Flatten(input_shape=(28, 28, 1)),

tf.keras.layers.Dense(128, activation=tf.nn.relu),

tf.keras.layers.Dropout(0.2),

tf.keras.layers.Dense(10, activation=tf.nn.softmax)

])

model.compile(optimizer='adam',

loss='sparse_categorical_crossentropy',

metrics=['accuracy'])

model.fit(training_images, training_labels, epochs=5)

锟斤拷锟节革拷锟斤拷锟接碉拷示锟斤拷锟斤拷锟斤拷锟皆参匡拷锟斤拷3锟斤拷锟斤拷使锟矫的★拷锟斤拷锟斤拷锟剿★拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷菁锟斤拷锟絋FDS锟斤拷也锟斤拷锟斤拷使锟矫★拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷训锟斤拷模锟酵碉拷锟斤拷锟斤拷锟斤拷锟诫：

import tensorflow as tf

import tensorflow_datasets as tfds

data = tfds.load('horses_or_humans', split='train', as_supervised=True)

train_batches = data.shuffle(100).batch(10)

model = tf.keras.models.Sequential([

tf.keras.layers.Conv2D(16, (3,3), activation='relu', input_shape=(300, 300, 3)),

tf.keras.layers.MaxPooling2D(2, 2),

tf.keras.layers.Conv2D(32, (3,3), activation='relu'),

tf.keras.layers.MaxPooling2D(2,2),

tf.keras.layers.Conv2D(64, (3,3), activation='relu'),

tf.keras.layers.MaxPooling2D(2,2),

tf.keras.layers.Conv2D(64, (3,3), activation='relu'),

tf.keras.layers.MaxPooling2D(2,2),

tf.keras.layers.Conv2D(64, (3,3), activation='relu'),

tf.keras.layers.MaxPooling2D(2,2),

tf.keras.layers.Flatten(),

tf.keras.layers.Dense(512, activation='relu'),

tf.keras.layers.Dense(1, activation='sigmoid')

])

model.compile(optimizer='Adam', loss='binary_crossentropy', metrics=['accuracy'])

history = model.fit(train_batches, epochs=10)

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟洁当直锟接ｏ拷只锟斤拷锟斤拷锟� tfds.load锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟侥分割（锟节憋拷锟斤拷锟斤拷锟斤拷训锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷模锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟捷憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷顺锟斤拷锟皆憋拷锟斤拷锟叫э拷亟锟斤拷锟窖碉拷锟斤拷锟�

锟斤拷Horses or Humans锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷为训锟斤拷锟斤拷锟酵诧拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷训锟斤拷时锟斤拷证模锟酵ｏ拷锟斤拷锟斤拷通锟斤拷TFDS锟斤拷锟截碉拷锟斤拷锟斤拷锟斤拷证锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷

val_data = tfds.load('horses_or_humans', split='test', as_supervised=True)

锟斤拷锟斤拷要锟斤拷锟斤拷训锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟界：

validation_batches = val_data.batch(32)

然锟斤拷锟斤拷训锟斤拷时锟斤拷指锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷为锟斤拷证锟斤拷锟捷★拷锟姐还锟斤拷要锟斤拷式锟斤拷锟斤拷每锟斤拷锟斤拷锟斤拷要使锟矫碉拷锟斤拷证锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷TensorFlow锟结报锟斤拷锟斤拷锟斤拷锟斤拷锟饺凤拷锟斤拷锟斤拷锟斤拷锟轿�1锟斤拷锟缴ｏ拷锟斤拷锟铰ｏ拷

history = model.fit(train_batches, epochs=10, validation_data=validation_batches, validation_steps=1)

锟斤拷锟斤拷锟截讹拷锟芥本

锟斤拷锟斤拷锟斤拷TFDS锟叫存储锟斤拷锟斤拷锟捷硷拷锟斤拷使锟斤拷MAJOR.MINOR.PATCH锟斤拷锟较低筹拷锟斤拷浔Ｖわ拷锟斤拷拢锟斤拷锟斤拷锟斤拷PATCH锟斤拷锟铰ｏ拷锟斤拷锟斤拷梅锟斤拷氐锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷撞锟斤拷锟街拷锟斤拷芊锟斤拷锟斤拷浠拷锟斤拷锟斤拷直浠拷钥锟斤拷锟斤拷锟接︼拷锟斤拷薷锟街拷摹锟斤拷锟斤拷MINOR锟斤拷锟铰ｏ拷锟斤拷锟斤拷锟捷憋拷锟街诧拷锟戒，锟斤拷锟斤拷锟杰伙拷锟斤拷每锟斤拷锟斤拷录锟斤拷锟斤拷锟斤拷锟铰碉拷锟斤拷锟皆ｏ拷锟斤拷锟狡伙拷锟皆革拷锟侥ｏ拷锟斤拷锟斤拷锟解，锟斤拷锟截讹拷锟斤拷片锟斤拷锟轿硷拷锟斤拷74页锟侥★拷使锟斤拷锟皆讹拷锟斤拷锟斤拷片锟斤拷锟斤拷锟斤拷锟斤拷锟捷诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟組AJOR锟斤拷锟铰ｏ拷锟斤拷锟铰硷拷锟绞斤拷锟斤拷锟轿伙拷每锟斤拷芑岱拷锟斤拷浠拷锟斤拷锟斤拷锟截讹拷锟斤拷片锟斤拷锟杰会返锟截诧拷同锟斤拷值锟斤拷

锟节硷拷锟斤拷锟斤拷菁锟绞憋拷锟斤拷锟结看锟斤拷锟斤拷时锟叫诧拷同锟芥本锟斤拷锟矫★拷锟斤拷锟斤拷锟界，cnn_dailymail锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷悴伙拷锟揭拷习姹撅拷锟斤拷锟斤拷锟阶词憋拷锟�3.0.0锟斤拷锟斤拷锟斤拷锟斤拷希锟斤拷使锟斤拷锟斤拷锟节版本锟斤拷锟斤拷锟斤拷1.0.0锟斤拷锟斤拷锟皆帮拷锟斤拷锟铰凤拷式锟斤拷锟截ｏ拷

data, info = tfds.load("cnn_dailymail:1.0.0", with_info=True)

锟斤拷注锟解，锟斤拷锟斤拷锟斤拷锟紺olab锟斤拷使锟斤拷TFDS锟斤拷锟斤拷锟斤拷锟斤拷Colab使锟矫碉拷TFDS锟芥本锟斤拷锟斤拷锟斤拷撰写时锟斤拷Colab预装锟斤拷TFDS锟斤拷2.0锟芥，锟斤拷锟斤拷锟叫达拷锟斤拷一些锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷bug锟斤拷锟斤拷锟斤拷cnn_dailymail锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷TFDS 2.1锟斤拷之锟斤拷陌姹撅拷锟斤拷锟斤拷薷锟斤拷锟斤拷锟剿斤拷锟斤拷使锟斤拷锟斤拷些锟芥本锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Colab锟叫帮拷装锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫碉拷默锟较版本锟斤拷

使锟斤拷映锟戒函锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷强

锟斤拷前锟斤拷锟斤拷陆锟斤拷校锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷ImageDataGenerator为模锟斤拷锟结供训锟斤拷锟斤拷锟斤拷时锟斤拷一些锟斤拷锟斤拷锟斤拷强锟斤拷锟竭★拷锟斤拷锟斤拷锟斤拷锟街拷锟斤拷锟斤拷锟斤拷使锟斤拷TFDS时实锟斤拷同锟斤拷锟侥癸拷锟杰ｏ拷锟斤拷为锟斤拷时锟姐不锟角达拷锟斤拷目录锟斤拷式锟斤拷取图锟斤拷实锟街此癸拷锟杰碉拷锟斤拷逊锟斤拷锟斤拷锟斤拷锟斤拷魏锟斤拷锟斤拷锟斤拷锟绞斤拷锟阶拷锟斤拷锟斤拷嵌锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟接筹拷浜拷锟斤拷锟斤拷锟斤拷锟斤拷强锟斤拷锟斤拷锟斤拷实锟斤拷锟斤拷一锟姐。

之前锟斤拷锟斤拷锟角讹拷Horses or Humans锟斤拷锟捷硷拷锟侥达拷锟斤拷只锟角达拷TFDS锟叫硷拷锟斤拷锟斤拷锟捷诧拷为锟戒创锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷示锟斤拷

data = tfds.load('horses_or_humans', split='train', as_supervised=True)

train_batches = data.shuffle(100).batch(10)

要锟斤拷锟斤拷锟捷斤拷锟叫变换锟斤拷锟斤拷锟斤拷映锟戒到锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷源锟斤拷锟揭伙拷锟接筹拷浜拷锟斤拷锟斤拷锟街伙拷潜锟阶硷拷锟絇ython锟斤拷锟诫。锟斤拷锟界，锟斤拷锟斤拷锟姐创锟斤拷锟斤拷一锟斤拷锟斤拷为augmentimages锟侥猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一些图锟斤拷锟斤拷强锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷

def augmentimages(image, label):

image = tf.cast(image, tf.float32)

image = (image/255)

image = tf.image.random_flip_left_right(image)

return image, label

然锟斤拷锟斤拷锟斤拷越锟斤拷锟接筹拷涞斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟揭伙拷锟斤拷锟轿猼rain锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷

train = data.map(augmentimages)

之锟斤拷锟节达拷锟斤拷锟斤拷锟斤拷时锟斤拷使锟斤拷train锟斤拷锟斤拷锟斤拷data锟斤拷锟斤拷锟铰ｏ拷

train_batches = train.shuffle(100).batch(32)

锟斤拷augmentimages锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷钥锟斤拷锟绞癸拷锟絫f.image.random_flip_left_right(image)锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷转锟斤拷tf.image锟斤拷锟斤拷锟叫很讹拷锟斤拷锟斤拷锟斤拷锟角匡拷暮锟斤拷锟斤拷锟斤拷锟较革拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥碉拷锟斤拷

使锟斤拷TensorFlow Addons

TensorFlow Addons锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫猴拷锟斤拷锟斤拷ImageDataGenerator锟斤拷强锟叫碉拷一些锟斤拷锟杰ｏ拷锟斤拷锟斤拷转锟斤拷锟斤拷锟节此匡拷锟叫匡拷锟矫ｏ拷锟斤拷私锟斤拷锟介看锟斤拷锟斤拷

使锟斤拷TensorFlow Addons锟角筹拷锟津单★拷锟斤拷只锟借安装锟解即锟缴ｏ拷

pip install tensorflow-addons

锟斤拷装锟斤拷珊螅锟斤拷越锟紸ddons锟斤拷锟诫到锟斤拷锟接筹拷浜拷锟斤拷小锟斤拷锟斤拷锟斤拷墙锟斤拷锟阶狝ddons锟斤拷锟斤拷前锟斤拷映锟戒函锟斤拷锟斤拷示锟斤拷锟斤拷

import tensorflow_addons as tfa

def augmentimages(image, label):

image = tf.cast(image, tf.float32)

image = (image/255)

image = tf.image.random_flip_left_right(image)

image = tfa.image.rotate(image, 40, interpolation='NEAREST')

return image, label

使锟斤拷锟皆讹拷锟斤拷指锟�

锟斤拷目前为止锟斤拷锟斤拷一直使锟矫碉拷锟斤拷预锟饺分革拷为训锟斤拷锟斤拷锟酵诧拷锟皆硷拷锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟界，Fashion MNIST锟斤拷60,000锟斤拷10,000锟斤拷锟斤拷录锟斤拷锟街憋拷锟斤拷锟斤拷训锟斤拷锟酵诧拷锟皆★拷锟斤拷锟斤拷锟斤拷悴伙拷锟绞癸拷锟斤拷锟叫╋拷指锟斤拷兀锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷约锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷锟截ｏ拷TFDS锟斤拷一锟斤拷强锟斤拷之锟斤拷锟斤拷锟斤拷锟节★拷锟斤拷锟斤拷锟结供锟斤拷一锟斤拷API锟斤拷锟斤拷锟斤拷锟姐精细锟截匡拷锟斤拷锟斤拷锟捷的分割方式锟斤拷

实锟斤拷锟斤拷锟斤拷锟窖撅拷锟斤拷锟斤拷锟斤拷锟街凤拷式锟剿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷

data = tfds.load('cats_vs_dogs', split='train', as_supervised=True)

注锟斤拷split锟斤拷锟斤拷锟斤拷一锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷train锟街割，锟斤拷恰锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟较ython锟斤拷锟斤拷片锟斤拷锟脚ｏ拷也锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟脚匡拷锟斤拷锟杰斤拷为锟节凤拷锟斤拷锟斤拷锟节讹拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷片锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷[ : : ]锟斤拷锟斤拷锟斤拷一锟斤拷锟洁当锟斤拷锟接碉拷锟斤法锟斤拷锟斤拷锟斤拷锟剿很达拷锟斤拷锟斤拷锟皆★拷

锟斤拷锟界，锟斤拷锟斤拷锟较ｏ拷锟絫rain锟斤拷前10,000锟斤拷锟斤拷录锟斤拷为训锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷省锟斤拷锟斤拷直锟接碉拷锟斤拷train[:10000]锟斤拷一锟斤拷锟斤拷锟矫的硷拷锟戒技锟斤拷锟角斤拷前锟斤拷冒锟脚讹拷锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷锟解将锟斤拷锟斤拷锟斤拷train前10,000锟斤拷锟斤拷录锟斤拷锟斤拷锟斤拷

data = tfds.load('cats_vs_dogs', split='train[:10000]', as_supervised=True)

锟姐还锟斤拷锟斤拷使锟斤拷%锟斤拷指锟斤拷锟街割。锟斤拷锟界，锟斤拷锟斤拷锟较ｏ拷锟角�20%锟侥硷拷录锟斤拷锟斤拷训锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷:20%锟斤拷

data = tfds.load('cats_vs_dogs', split='train[:20%]', as_supervised=True)

锟斤拷锟斤拷锟斤拷锟斤拷锟皆革拷锟斤拷一锟斤拷锟斤拷锟斤拷隙锟斤拷锟街割。也锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟较ｏ拷锟窖碉拷锟斤拷锟斤拷锟斤拷锟角�1000锟斤拷锟斤拷录锟斤拷锟斤拷锟�1000锟斤拷锟斤拷录锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�-1000:锟斤拷示锟斤拷锟斤拷锟�1000锟斤拷锟斤拷录锟斤拷锟斤拷锟斤拷:1000锟斤拷锟斤拷示锟斤拷前1000锟斤拷锟斤拷录锟斤拷锟斤拷锟斤拷

data = tfds.load('cats_vs_dogs', split='train[-1000:]+train[:1000]', as_supervised=True)

Dogs vs. Cats锟斤拷锟捷硷拷没锟叫固讹拷锟斤拷训锟斤拷锟斤拷锟斤拷锟皆猴拷锟斤拷证锟街割，锟斤拷使锟斤拷TFDS锟斤拷锟斤拷锟斤拷锟皆讹拷锟斤拷指锟角筹拷锟津单★拷锟斤拷锟斤拷锟斤拷希锟斤拷锟街革拷为80%锟斤拷10%锟斤拷10%锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷

train_data = tfds.load('cats_vs_dogs', split='train[:80%]', as_supervised=True)

validation_data = tfds.load('cats_vs_dogs', split='train[80%:90%]', as_supervised=True)

test_data = tfds.load('cats_vs_dogs', split='train[-10%:]', as_supervised=True)

一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角ｏ拷锟酵匡拷锟斤拷锟斤拷使锟斤拷锟轿猴拷锟斤拷锟斤拷锟街革拷一锟斤拷使锟斤拷锟斤拷锟角★拷

锟斤拷要注锟斤拷锟斤拷牵锟斤拷锟斤拷诜锟斤拷氐锟斤拷锟斤拷菁锟斤拷薹锟斤拷锟教斤拷锟斤拷涑わ拷龋锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷确锟斤拷锟斤拷锟角凤拷锟斤拷确锟截分革拷锟斤拷原始锟斤拷锟捷硷拷锟斤拷要锟介看锟斤拷锟斤拷某锟斤拷锟街革拷锟叫的硷拷录锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角讹拷锟斤拷沾锟斤拷锟斤拷锟窖碉拷锟斤拷锟斤拷锟斤拷屑锟斤拷锟斤拷拇锟斤拷耄�

train_length = [i for i, _ in enumerate(train_data)][-1] + 1

print(train_length)

锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷墓锟斤拷蹋锟斤拷锟斤拷锟斤拷确锟斤拷锟斤拷锟节碉拷锟斤拷时使锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟杰结：锟斤拷锟铰斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟� TensorFlow Datasets锟斤拷TFDS锟斤拷锟斤拷 Keras 锟筋建锟斤拷锟斤拷锟斤拷模锟酵ｏ拷锟斤拷探锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷强锟斤拷锟街革拷锟皆わ拷锟斤拷锟斤拷裙丶锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟� TFDS 锟斤拷锟捷硷拷锟斤拷 Keras 模锟酵斤拷希锟斤拷锟窖э拷锟斤拷锟斤拷锟轿革拷效锟斤拷锟截猴拷转锟斤拷锟斤拷锟捷ｏ拷为锟斤拷锟斤拷锟斤拷模锟酵的癸拷锟斤拷锟斤拷训锟斤拷锟斤拷锟斤拷准锟斤拷锟斤拷锟斤拷锟解，锟斤拷锟角伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷远锟斤拷锟斤拷锟斤拷莘指锟斤拷应锟斤拷锟斤拷锟斤拷锟斤拷强锟斤拷为模锟斤拷锟结供锟斤拷锟接讹拷锟斤拷锟斤拷锟斤拷训锟斤拷锟斤拷锟捷★拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟杰猴拷锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷锟斤拷锟接︼拷锟� TensorFlow 锟斤拷 Keras 锟斤拷锟叫革拷锟斤拷锟斤拷锟窖帮拷锟侥匡拷目锟斤拷锟斤拷锟轿拷锟斤拷锟侥ｏ拷偷拇罱拷於拷锟绞碉拷幕锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷墙锟斤拷锟轿拷锟揭斤拷锟杰达拷TFDS锟斤拷锟斤拷锟截筹拷锟斤拷锟斤拷锟斤拷锟捷硷拷锟斤拷锟斤拷什么锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟侥★拷TFRecord!

小锟斤拷锟狡硷拷锟侥讹拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥斤拷为锟斤拷锟斤拷锟斤拷息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷同锟斤拷锟睫观碉拷锟街な碉拷锟斤拷锟斤拷锟斤拷锟�

a 1.0: 锟斤拷锟酵ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷营状态锟斤拷锟斤拷式锟斤拷营锟斤拷锟斤拷锟斤拷锟皆ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷; 锟斤拷戏锟斤拷锟斤拷

锟斤拷戏锟斤拷锟�

锟斤拷戏锟斤拷频

锟斤拷戏锟斤拷锟斤拷

锟斤拷戏锟筋动; 锟斤拷alittletotheleft锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟筋备锟杰伙拷迎锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷戏锟斤拷锟斤拷业锟斤拷锟斤拷锟斤拷嵌锟斤拷粘锟斤拷锟斤拷锟斤拷械母锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷

锟剿癸拷锟斤拷锟斤拷 1.0.5: 锟斤拷锟酵ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷营状态锟斤拷锟斤拷式锟斤拷营锟斤拷锟斤拷锟斤拷锟皆ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷; 锟斤拷戏锟斤拷锟斤拷

锟斤拷戏锟斤拷锟�

锟斤拷戏锟斤拷频

锟斤拷戏锟斤拷锟斤拷

锟斤拷戏锟筋动; 锟斤拷锟剿癸拷锟斤拷锟杰★拷锟角匡拷锟斤拷锟斤拷FELF锟斤拷锟斤拷锟斤拷一锟斤拷AI锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷戏锟斤拷锟斤拷铱锟斤拷院锟斤拷锟较凤拷械锟紸I小锟斤拷锟斤拷锟斤拷欤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�