653 lines
24 KiB
Python
653 lines
24 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Operations for working with string Tensors."""
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import numpy as np
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from tensorflow.python.framework import constant_op
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from tensorflow.python.framework import dtypes
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from tensorflow.python.framework import ops
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from tensorflow.python.framework import sparse_tensor
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from tensorflow.python.framework import tensor_util
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from tensorflow.python.ops import array_ops
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from tensorflow.python.ops import gen_parsing_ops
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from tensorflow.python.ops import gen_string_ops
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from tensorflow.python.ops import math_ops
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# go/tf-wildcard-import
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# pylint: disable=wildcard-import
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# pylint: disable=g-bad-import-order
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from tensorflow.python.ops.gen_string_ops import *
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from tensorflow.python.util import compat as util_compat
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from tensorflow.python.util import deprecation
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from tensorflow.python.util import dispatch
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from tensorflow.python.util.tf_export import tf_export
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# pylint: enable=g-bad-import-order
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# pylint: enable=wildcard-import
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# pylint: disable=redefined-builtin
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@tf_export("strings.regex_full_match")
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@dispatch.register_unary_elementwise_api
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@dispatch.add_dispatch_support
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def regex_full_match(input, pattern, name=None):
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r"""Match elements of `input` with regex `pattern`.
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Args:
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input: string `Tensor`, the source strings to process.
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pattern: string or scalar string `Tensor`, regular expression to use,
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see more details at https://github.com/google/re2/wiki/Syntax
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name: Name of the op.
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Returns:
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bool `Tensor` of the same shape as `input` with match results.
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"""
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if isinstance(pattern, util_compat.bytes_or_text_types):
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# When `pattern` is static through the life of the op we can
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# use a version which performs the expensive regex compilation once at
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# creation time.
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return gen_string_ops.static_regex_full_match(
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input=input, pattern=pattern, name=name)
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return gen_string_ops.regex_full_match(
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input=input, pattern=pattern, name=name)
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regex_full_match.__doc__ = gen_string_ops.regex_full_match.__doc__
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@tf_export(
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"strings.regex_replace", v1=["strings.regex_replace", "regex_replace"])
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@dispatch.register_unary_elementwise_api
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@dispatch.add_dispatch_support
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@deprecation.deprecated_endpoints("regex_replace")
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def regex_replace(input, pattern, rewrite, replace_global=True, name=None):
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r"""Replace elements of `input` matching regex `pattern` with `rewrite`.
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>>> tf.strings.regex_replace("Text with tags.<br /><b>contains html</b>",
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... "<[^>]+>", " ")
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<tf.Tensor: shape=(), dtype=string, numpy=b'Text with tags. contains html '>
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Args:
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input: string `Tensor`, the source strings to process.
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pattern: string or scalar string `Tensor`, regular expression to use,
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see more details at https://github.com/google/re2/wiki/Syntax
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rewrite: string or scalar string `Tensor`, value to use in match
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replacement, supports backslash-escaped digits (\1 to \9) can be to insert
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text matching corresponding parenthesized group.
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replace_global: `bool`, if `True` replace all non-overlapping matches,
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else replace only the first match.
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name: A name for the operation (optional).
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Returns:
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string `Tensor` of the same shape as `input` with specified replacements.
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"""
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if (isinstance(pattern, util_compat.bytes_or_text_types) and
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isinstance(rewrite, util_compat.bytes_or_text_types)):
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# When `pattern` and `rewrite` are static through the life of the op we can
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# use a version which performs the expensive regex compilation once at
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# creation time.
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return gen_string_ops.static_regex_replace(
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input=input, pattern=pattern,
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rewrite=rewrite, replace_global=replace_global,
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name=name)
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return gen_string_ops.regex_replace(
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input=input, pattern=pattern,
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rewrite=rewrite, replace_global=replace_global,
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name=name)
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@tf_export("strings.format")
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@dispatch.add_dispatch_support
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def string_format(template, inputs, placeholder="{}", summarize=3, name=None):
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r"""Formats a string template using a list of tensors.
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Formats a string template using a list of tensors, abbreviating tensors by
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only printing the first and last `summarize` elements of each dimension
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(recursively). If formatting only one tensor into a template, the tensor does
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not have to be wrapped in a list.
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Example:
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Formatting a single-tensor template:
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>>> tensor = tf.range(5)
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>>> tf.strings.format("tensor: {}, suffix", tensor)
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<tf.Tensor: shape=(), dtype=string, numpy=b'tensor: [0 1 2 3 4], suffix'>
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Formatting a multi-tensor template:
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>>> tensor_a = tf.range(2)
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>>> tensor_b = tf.range(1, 4, 2)
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>>> tf.strings.format("a: {}, b: {}, suffix", (tensor_a, tensor_b))
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<tf.Tensor: shape=(), dtype=string, numpy=b'a: [0 1], b: [1 3], suffix'>
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Args:
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template: A string template to format tensor values into.
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inputs: A list of `Tensor` objects, or a single Tensor.
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The list of tensors to format into the template string. If a solitary
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tensor is passed in, the input tensor will automatically be wrapped as a
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list.
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placeholder: An optional `string`. Defaults to `{}`.
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At each placeholder occurring in the template, a subsequent tensor
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will be inserted.
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summarize: An optional `int`. Defaults to `3`.
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When formatting the tensors, show the first and last `summarize`
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entries of each tensor dimension (recursively). If set to -1, all
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elements of the tensor will be shown.
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name: A name for the operation (optional).
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Returns:
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A scalar `Tensor` of type `string`.
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Raises:
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ValueError: if the number of placeholders does not match the number of
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inputs.
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"""
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# If there is only one tensor to format, we will automatically wrap it in a
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# list to simplify the user experience
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if tensor_util.is_tf_type(inputs):
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inputs = [inputs]
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if template.count(placeholder) != len(inputs):
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raise ValueError(f"The template expects {template.count(placeholder)} "
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f"tensors, but the inputs only has {len(inputs)}. "
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"Please ensure the number of placeholders in template "
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"matches inputs length.")
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return gen_string_ops.string_format(inputs,
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template=template,
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placeholder=placeholder,
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summarize=summarize,
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name=name)
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# Note: tf.strings.split is exported in ragged/ragged_string_ops.py, which
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# defines a wrapper for this function.
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def string_split(source, sep=None, skip_empty=True, delimiter=None): # pylint: disable=invalid-name
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"""Split elements of `source` based on `delimiter` into a `SparseTensor`.
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Let N be the size of source (typically N will be the batch size). Split each
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element of `source` based on `delimiter` and return a `SparseTensor`
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containing the split tokens. Empty tokens are ignored.
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If `sep` is an empty string, each element of the `source` is split
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into individual strings, each containing one byte. (This includes splitting
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multibyte sequences of UTF-8.) If delimiter contains multiple bytes, it is
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treated as a set of delimiters with each considered a potential split point.
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For example:
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N = 2, source[0] is 'hello world' and source[1] is 'a b c', then the output
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will be
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st.indices = [0, 0;
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0, 1;
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1, 0;
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1, 1;
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1, 2]
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st.shape = [2, 3]
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st.values = ['hello', 'world', 'a', 'b', 'c']
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Args:
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source: `1-D` string `Tensor`, the strings to split.
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sep: `0-D` string `Tensor`, the delimiter character, the string should
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be length 0 or 1. Default is ' '.
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skip_empty: A `bool`. If `True`, skip the empty strings from the result.
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delimiter: deprecated alias for `sep`.
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Raises:
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ValueError: If delimiter is not a string.
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Returns:
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A `SparseTensor` of rank `2`, the strings split according to the delimiter.
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The first column of the indices corresponds to the row in `source` and the
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second column corresponds to the index of the split component in this row.
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"""
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delimiter = deprecation.deprecated_argument_lookup(
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"sep", sep, "delimiter", delimiter)
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if delimiter is None:
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delimiter = " "
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delimiter = ops.convert_to_tensor(delimiter, dtype=dtypes.string)
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source = ops.convert_to_tensor(source, dtype=dtypes.string)
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indices, values, shape = gen_string_ops.string_split(
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source, delimiter=delimiter, skip_empty=skip_empty)
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indices.set_shape([None, 2])
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values.set_shape([None])
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shape.set_shape([2])
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return sparse_tensor.SparseTensor(indices, values, shape)
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# Note: tf.strings.split is exported in ragged/ragged_string_ops.py, which
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# defines a wrapper for this function.
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def string_split_v2(source, sep=None, maxsplit=-1):
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"""Split elements of `source` based on `sep` into a `SparseTensor`.
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Let N be the size of source (typically N will be the batch size). Split each
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element of `source` based on `sep` and return a `SparseTensor`
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containing the split tokens. Empty tokens are ignored.
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For example, N = 2, source[0] is 'hello world' and source[1] is 'a b c',
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then the output will be
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st.indices = [0, 0;
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0, 1;
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1, 0;
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1, 1;
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1, 2]
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st.shape = [2, 3]
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st.values = ['hello', 'world', 'a', 'b', 'c']
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If `sep` is given, consecutive delimiters are not grouped together and are
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deemed to delimit empty strings. For example, source of `"1<>2<><>3"` and
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sep of `"<>"` returns `["1", "2", "", "3"]`. If `sep` is None or an empty
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string, consecutive whitespace are regarded as a single separator, and the
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result will contain no empty strings at the start or end if the string has
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leading or trailing whitespace.
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Note that the above mentioned behavior matches python's str.split.
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Args:
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source: `1-D` string `Tensor`, the strings to split.
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sep: `0-D` string `Tensor`, the delimiter character.
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maxsplit: An `int`. If `maxsplit > 0`, limit of the split of the result.
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Raises:
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ValueError: If sep is not a string.
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Returns:
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A `SparseTensor` of rank `2`, the strings split according to the delimiter.
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The first column of the indices corresponds to the row in `source` and the
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second column corresponds to the index of the split component in this row.
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"""
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if sep is None:
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sep = ""
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sep = ops.convert_to_tensor(sep, dtype=dtypes.string)
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source = ops.convert_to_tensor(source, dtype=dtypes.string)
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indices, values, shape = gen_string_ops.string_split_v2(
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source, sep=sep, maxsplit=maxsplit)
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indices.set_shape([None, 2])
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values.set_shape([None])
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shape.set_shape([2])
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return sparse_tensor.SparseTensor(indices, values, shape)
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def _reduce_join_reduction_dims(x, axis):
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"""Returns range(rank(x) - 1, 0, -1) if axis is None; or axis otherwise."""
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if axis is not None:
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return axis
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else:
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# Fast path: avoid creating Rank and Range ops if ndims is known.
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if x.get_shape().ndims is not None:
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return constant_op.constant(
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np.arange(x.get_shape().ndims - 1, -1, -1), dtype=dtypes.int32)
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# Otherwise, we rely on Range and Rank to do the right thing at run-time.
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return math_ops.range(array_ops.rank(x) - 1, -1, -1)
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@tf_export(v1=["strings.reduce_join", "reduce_join"])
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@dispatch.add_dispatch_support
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@deprecation.deprecated_args(None,
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"keep_dims is deprecated, use keepdims instead",
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"keep_dims")
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@deprecation.deprecated_endpoints("reduce_join")
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def reduce_join(inputs, axis=None, # pylint: disable=missing-docstring
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keep_dims=None,
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separator="",
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name=None,
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reduction_indices=None,
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keepdims=None):
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keepdims = deprecation.deprecated_argument_lookup("keepdims", keepdims,
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"keep_dims", keep_dims)
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if keep_dims is None:
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keep_dims = False
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axis = deprecation.deprecated_argument_lookup("axis", axis,
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"reduction_indices",
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reduction_indices)
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return reduce_join_v2(
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inputs=inputs,
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axis=axis,
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keepdims=keepdims,
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separator=separator,
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name=name)
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@tf_export("strings.reduce_join", v1=[])
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@dispatch.add_dispatch_support
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def reduce_join_v2( # pylint: disable=missing-docstring
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inputs,
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axis=None,
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keepdims=False,
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separator="",
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name=None):
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"""Joins all strings into a single string, or joins along an axis.
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This is the reduction operation for the elementwise `tf.strings.join` op.
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>>> tf.strings.reduce_join([['abc','123'],
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... ['def','456']]).numpy()
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b'abc123def456'
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>>> tf.strings.reduce_join([['abc','123'],
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... ['def','456']], axis=-1).numpy()
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array([b'abc123', b'def456'], dtype=object)
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>>> tf.strings.reduce_join([['abc','123'],
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... ['def','456']],
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... axis=-1,
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... separator=" ").numpy()
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array([b'abc 123', b'def 456'], dtype=object)
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Args:
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inputs: A `tf.string` tensor.
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axis: Which axis to join along. The default behavior is to join all
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elements, producing a scalar.
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keepdims: If true, retains reduced dimensions with length 1.
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separator: a string added between each string being joined.
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name: A name for the operation (optional).
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Returns:
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A `tf.string` tensor.
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"""
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with ops.name_scope(None, "ReduceJoin", [inputs, axis]):
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inputs_t = ops.convert_to_tensor(inputs)
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axis = _reduce_join_reduction_dims(inputs_t, axis)
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return gen_string_ops.reduce_join(
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inputs=inputs_t,
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reduction_indices=axis,
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keep_dims=keepdims,
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separator=separator,
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name=name)
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reduce_join.__doc__ = reduce_join_v2.__doc__
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# This wrapper provides backwards compatibility for code that predates the
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# unit argument and that passed 'name' as a positional argument.
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@tf_export(v1=["strings.length"])
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@dispatch.register_unary_elementwise_api
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@dispatch.add_dispatch_support
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def string_length(input, name=None, unit="BYTE"):
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"""Computes the length of each string given in the input tensor.
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>>> strings = tf.constant(['Hello','TensorFlow', '🙂'])
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>>> tf.strings.length(strings).numpy() # default counts bytes
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array([ 5, 10, 4], dtype=int32)
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>>> tf.strings.length(strings, unit="UTF8_CHAR").numpy()
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array([ 5, 10, 1], dtype=int32)
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Args:
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input: A `Tensor` of type `string`. The strings for which to compute the
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length for each element.
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name: A name for the operation (optional).
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unit: An optional `string` from: `"BYTE", "UTF8_CHAR"`. Defaults to
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`"BYTE"`. The unit that is counted to compute string length. One of:
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`"BYTE"` (for the number of bytes in each string) or `"UTF8_CHAR"` (for
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the number of UTF-8 encoded Unicode code points in each string). Results
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are undefined if `unit=UTF8_CHAR` and the `input` strings do not contain
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structurally valid UTF-8.
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||
|
|
||
|
Returns:
|
||
|
A `Tensor` of type `int32`, containing the length of the input string in
|
||
|
the same element of the input tensor.
|
||
|
"""
|
||
|
return gen_string_ops.string_length(input, unit=unit, name=name)
|
||
|
|
||
|
|
||
|
@tf_export("strings.length", v1=[])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def string_length_v2(input, unit="BYTE", name=None):
|
||
|
return gen_string_ops.string_length(input, unit=unit, name=name)
|
||
|
|
||
|
|
||
|
string_length_v2.__doc__ = gen_string_ops.string_length.__doc__
|
||
|
|
||
|
|
||
|
@tf_export(v1=["substr"])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
@deprecation.deprecated(None, "Use `tf.strings.substr` instead of `tf.substr`.")
|
||
|
def substr_deprecated(input, pos, len, name=None, unit="BYTE"):
|
||
|
return substr(input, pos, len, name=name, unit=unit)
|
||
|
|
||
|
substr_deprecated.__doc__ = gen_string_ops.substr.__doc__
|
||
|
|
||
|
|
||
|
@tf_export(v1=["strings.substr"])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def substr(input, pos, len, name=None, unit="BYTE"):
|
||
|
return gen_string_ops.substr(input, pos, len, unit=unit, name=name)
|
||
|
|
||
|
substr.__doc__ = gen_string_ops.substr.__doc__
|
||
|
|
||
|
|
||
|
@tf_export("strings.substr", v1=[])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def substr_v2(input, pos, len, unit="BYTE", name=None):
|
||
|
return gen_string_ops.substr(input, pos, len, unit=unit, name=name)
|
||
|
|
||
|
substr_v2.__doc__ = gen_string_ops.substr.__doc__
|
||
|
|
||
|
|
||
|
ops.NotDifferentiable("RegexReplace")
|
||
|
ops.NotDifferentiable("StringToHashBucket")
|
||
|
ops.NotDifferentiable("StringToHashBucketFast")
|
||
|
ops.NotDifferentiable("StringToHashBucketStrong")
|
||
|
ops.NotDifferentiable("ReduceJoin")
|
||
|
ops.NotDifferentiable("StringJoin")
|
||
|
ops.NotDifferentiable("StringSplit")
|
||
|
ops.NotDifferentiable("AsString")
|
||
|
ops.NotDifferentiable("EncodeBase64")
|
||
|
ops.NotDifferentiable("DecodeBase64")
|
||
|
|
||
|
|
||
|
@tf_export("strings.to_number", v1=[])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def string_to_number(input, out_type=dtypes.float32, name=None):
|
||
|
r"""Converts each string in the input Tensor to the specified numeric type.
|
||
|
|
||
|
(Note that int32 overflow results in an error while float overflow
|
||
|
results in a rounded value.)
|
||
|
|
||
|
Examples:
|
||
|
|
||
|
>>> tf.strings.to_number("1.55")
|
||
|
<tf.Tensor: shape=(), dtype=float32, numpy=1.55>
|
||
|
>>> tf.strings.to_number("3", tf.int32)
|
||
|
<tf.Tensor: shape=(), dtype=int32, numpy=3>
|
||
|
|
||
|
Args:
|
||
|
input: A `Tensor` of type `string`.
|
||
|
out_type: An optional `tf.DType` from: `tf.float32, tf.float64, tf.int32,
|
||
|
tf.int64`. Defaults to `tf.float32`.
|
||
|
The numeric type to interpret each string in `string_tensor` as.
|
||
|
name: A name for the operation (optional).
|
||
|
|
||
|
Returns:
|
||
|
A `Tensor` of type `out_type`.
|
||
|
"""
|
||
|
return gen_parsing_ops.string_to_number(input, out_type, name)
|
||
|
|
||
|
|
||
|
@tf_export(v1=["strings.to_number", "string_to_number"])
|
||
|
@dispatch.add_dispatch_support
|
||
|
def string_to_number_v1(
|
||
|
string_tensor=None,
|
||
|
out_type=dtypes.float32,
|
||
|
name=None,
|
||
|
input=None):
|
||
|
string_tensor = deprecation.deprecated_argument_lookup(
|
||
|
"input", input, "string_tensor", string_tensor)
|
||
|
return gen_parsing_ops.string_to_number(string_tensor, out_type, name)
|
||
|
|
||
|
string_to_number_v1.__doc__ = gen_parsing_ops.string_to_number.__doc__
|
||
|
|
||
|
|
||
|
@tf_export("strings.to_hash_bucket", v1=[])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def string_to_hash_bucket(input, num_buckets, name=None):
|
||
|
# pylint: disable=line-too-long
|
||
|
r"""Converts each string in the input Tensor to its hash mod by a number of buckets.
|
||
|
|
||
|
The hash function is deterministic on the content of the string within the
|
||
|
process.
|
||
|
|
||
|
Note that the hash function may change from time to time.
|
||
|
This functionality will be deprecated and it's recommended to use
|
||
|
`tf.strings.to_hash_bucket_fast()` or `tf.strings.to_hash_bucket_strong()`.
|
||
|
|
||
|
Examples:
|
||
|
|
||
|
>>> tf.strings.to_hash_bucket(["Hello", "TensorFlow", "2.x"], 3)
|
||
|
<tf.Tensor: shape=(3,), dtype=int64, numpy=array([2, 0, 1])>
|
||
|
|
||
|
Args:
|
||
|
input: A `Tensor` of type `string`.
|
||
|
num_buckets: An `int` that is `>= 1`. The number of buckets.
|
||
|
name: A name for the operation (optional).
|
||
|
|
||
|
Returns:
|
||
|
A `Tensor` of type `int64`.
|
||
|
"""
|
||
|
# pylint: enable=line-too-long
|
||
|
return gen_string_ops.string_to_hash_bucket(input, num_buckets, name)
|
||
|
|
||
|
|
||
|
@tf_export(v1=["strings.to_hash_bucket", "string_to_hash_bucket"])
|
||
|
@dispatch.register_unary_elementwise_api
|
||
|
@dispatch.add_dispatch_support
|
||
|
def string_to_hash_bucket_v1( # pylint: disable=missing-function-docstring
|
||
|
string_tensor=None,
|
||
|
num_buckets=None,
|
||
|
name=None,
|
||
|
input=None):
|
||
|
string_tensor = deprecation.deprecated_argument_lookup(
|
||
|
"input", input, "string_tensor", string_tensor)
|
||
|
return gen_string_ops.string_to_hash_bucket(string_tensor, num_buckets, name)
|
||
|
|
||
|
string_to_hash_bucket_v1.__doc__ = gen_string_ops.string_to_hash_bucket.__doc__
|
||
|
|
||
|
|
||
|
@tf_export("strings.join", v1=["strings.join", "string_join"])
|
||
|
@dispatch.add_dispatch_support
|
||
|
@deprecation.deprecated_endpoints("string_join")
|
||
|
def string_join(inputs, separator="", name=None):
|
||
|
"""Perform element-wise concatenation of a list of string tensors.
|
||
|
|
||
|
Given a list of string tensors of same shape, performs element-wise
|
||
|
concatenation of the strings of the same index in all tensors.
|
||
|
|
||
|
|
||
|
>>> tf.strings.join(['abc','def']).numpy()
|
||
|
b'abcdef'
|
||
|
>>> tf.strings.join([['abc','123'],
|
||
|
... ['def','456'],
|
||
|
... ['ghi','789']]).numpy()
|
||
|
array([b'abcdefghi', b'123456789'], dtype=object)
|
||
|
>>> tf.strings.join([['abc','123'],
|
||
|
... ['def','456']],
|
||
|
... separator=" ").numpy()
|
||
|
array([b'abc def', b'123 456'], dtype=object)
|
||
|
|
||
|
The reduction version of this elementwise operation is
|
||
|
`tf.strings.reduce_join`
|
||
|
|
||
|
Args:
|
||
|
inputs: A list of `tf.Tensor` objects of same size and `tf.string` dtype.
|
||
|
separator: A string added between each string being joined.
|
||
|
name: A name for the operation (optional).
|
||
|
|
||
|
Returns:
|
||
|
A `tf.string` tensor.
|
||
|
"""
|
||
|
return gen_string_ops.string_join(inputs, separator=separator, name=name)
|
||
|
|
||
|
|
||
|
@tf_export("strings.unsorted_segment_join")
|
||
|
@dispatch.add_dispatch_support
|
||
|
def unsorted_segment_join(inputs,
|
||
|
segment_ids,
|
||
|
num_segments,
|
||
|
separator="",
|
||
|
name=None):
|
||
|
"""Joins the elements of `inputs` based on `segment_ids`.
|
||
|
|
||
|
Computes the string join along segments of a tensor.
|
||
|
|
||
|
Given `segment_ids` with rank `N` and `data` with rank `N+M`:
|
||
|
|
||
|
```
|
||
|
output[i, k1...kM] = strings.join([data[j1...jN, k1...kM])
|
||
|
```
|
||
|
|
||
|
where the join is over all `[j1...jN]` such that `segment_ids[j1...jN] = i`.
|
||
|
|
||
|
Strings are joined in row-major order.
|
||
|
|
||
|
For example:
|
||
|
|
||
|
>>> inputs = ['this', 'a', 'test', 'is']
|
||
|
>>> segment_ids = [0, 1, 1, 0]
|
||
|
>>> num_segments = 2
|
||
|
>>> separator = ' '
|
||
|
>>> tf.strings.unsorted_segment_join(inputs, segment_ids, num_segments,
|
||
|
... separator).numpy()
|
||
|
array([b'this is', b'a test'], dtype=object)
|
||
|
|
||
|
>>> inputs = [['Y', 'q', 'c'], ['Y', '6', '6'], ['p', 'G', 'a']]
|
||
|
>>> segment_ids = [1, 0, 1]
|
||
|
>>> num_segments = 2
|
||
|
>>> tf.strings.unsorted_segment_join(inputs, segment_ids, num_segments,
|
||
|
... separator=':').numpy()
|
||
|
array([[b'Y', b'6', b'6'],
|
||
|
[b'Y:p', b'q:G', b'c:a']], dtype=object)
|
||
|
|
||
|
Args:
|
||
|
inputs: A list of `tf.Tensor` objects of type `tf.string`.
|
||
|
segment_ids: A tensor whose shape is a prefix of `inputs.shape` and whose
|
||
|
type must be `tf.int32` or `tf.int64`. Negative segment ids are not
|
||
|
supported.
|
||
|
num_segments: A scalar of type `tf.int32` or `tf.int64`. Must be
|
||
|
non-negative and larger than any segment id.
|
||
|
separator: The separator to use when joining. Defaults to `""`.
|
||
|
name: A name for the operation (optional).
|
||
|
|
||
|
Returns:
|
||
|
A `tf.string` tensor representing the concatenated values, using the given
|
||
|
separator.
|
||
|
"""
|
||
|
return gen_string_ops.unsorted_segment_join(
|
||
|
inputs, segment_ids, num_segments, separator=separator, name=name)
|
||
|
|
||
|
|
||
|
# Register elementwise ops that don't have Python wrappers.
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.as_string)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.decode_base64)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.encode_base64)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.string_lower)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.string_upper)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.unicode_transcode)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.string_strip)
|
||
|
dispatch.register_unary_elementwise_api(
|
||
|
gen_string_ops.string_to_hash_bucket_fast)
|
||
|
dispatch.register_unary_elementwise_api(
|
||
|
gen_string_ops.string_to_hash_bucket_strong)
|
||
|
dispatch.register_unary_elementwise_api(gen_string_ops.unicode_script)
|