tf.contrib.layers.parse_feature_columns_from_examples

Парсит tf.Examples для извлечения тензоров для заданных feature_columns.

tf.contrib.layers.parse_feature_columns_from_examples(
    serialized, feature_columns, name=None, example_names=None
)

Это оболочка для 'tf.io.parse_example'.

Пример:

columns_to_tensor = parse_feature_columns_from_examples(
    serialized=my_data,
    feature_columns=my_features)

# Where my_features are:
# Define features and transformations
sparse_feature_a = sparse_column_with_keys(
    column_name="sparse_feature_a", keys=["AB", "CD", ...])

embedding_feature_a = embedding_column(
    sparse_id_column=sparse_feature_a, dimension=3, combiner="sum")

sparse_feature_b = sparse_column_with_hash_bucket(
    column_name="sparse_feature_b", hash_bucket_size=1000)

embedding_feature_b = embedding_column(
    sparse_id_column=sparse_feature_b, dimension=16, combiner="sum")

crossed_feature_a_x_b = crossed_column(
    columns=[sparse_feature_a, sparse_feature_b], hash_bucket_size=10000)

real_feature = real_valued_column("real_feature")
real_feature_buckets = bucketized_column(
    source_column=real_feature, boundaries=[...])

my_features = [embedding_feature_b, real_feature_buckets, embedding_feature_a]