def test_tfdataset_with_dataframe(self):
rdd = self.sc.range(0, 1000)
df = rdd.map(lambda x: (DenseVector(
np.random.rand(20).astype(np.float)), x % 10)).toDF(
["feature", "label"])
train_df, val_df = df.randomSplit([0.7, 0.3])
dataset = TFDataset.from_dataframe(train_df,
feature_cols=["feature"],
labels_cols=["label"],
batch_size=32,
validation_df=val_df)
seq = tf.keras.Sequential([
tf.keras.layers.Flatten(input_shape=(20, )),
tf.keras.layers.Dense(10, activation="softmax")
])
seq.compile(optimizer=tf.keras.optimizers.RMSprop(),
loss='sparse_categorical_crossentropy',
metrics=['accuracy'])
model = KerasModel(seq)
model.fit(dataset)
dataset = TFDataset.from_dataframe(val_df,
feature_cols=["feature"],
batch_per_thread=32)
model.predict(dataset).collect()
dataset = TFDataset.from_dataframe(val_df,
feature_cols=["feature"],
labels_cols=["label"],
batch_per_thread=32)
model.evaluate(dataset)
def create_ds(mode):
if mode == "train":
dataset = TFDataset.from_dataframe(train_df,
feature_cols=["feature"],
labels_cols=["label"],
batch_size=32,
validation_df=val_df)
elif mode == "predict":
dataset = TFDataset.from_dataframe(val_df,
feature_cols=["feature"],
batch_per_thread=32)
elif mode == "evaluate":
dataset = TFDataset.from_dataframe(val_df,
feature_cols=["feature"],
labels_cols=["label"],
batch_per_thread=32)
else:
raise ValueError("unrecognized mode: {}".format(mode))
return dataset