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TensorFlow 1 version
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View source on GitHub
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Splits each string into a sequence of code points with start offsets.
tf.strings.unicode_split_with_offsets(
input, input_encoding, errors='replace', replacement_char=65533,
name=None
)
This op is similar to tf.strings.decode(...), but it also returns the
start offset for each character in its respective string. This information
can be used to align the characters with the original byte sequence.
Returns a tuple (chars, start_offsets) where:
chars[i1...iN, j]is the substring ofinput[i1...iN]that encodes itsjth character, when decoded usinginput_encoding.start_offsets[i1...iN, j]is the start byte offset for thejth character ininput[i1...iN], when decoded usinginput_encoding.
Args | |
|---|---|
input
|
An N dimensional potentially ragged string tensor with shape
[D1...DN]. N must be statically known.
|
input_encoding
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String name for the unicode encoding that should be used to decode each string. |
errors
|
Specifies the response when an input string can't be converted
using the indicated encoding. One of:
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replacement_char
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The replacement codepoint to be used in place of invalid
substrings in input when errors='replace'.
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name
|
A name for the operation (optional). |
Returns | |
|---|---|
A tuple of N+1 dimensional tensors (codepoints, start_offsets).
The returned tensors are |
Example:
input = [s.encode('utf8') for s in (u'G\xf6\xf6dnight', u'\U0001f60a')]result = tf.strings.unicode_split_with_offsets(input, 'UTF-8')result[0].to_list() # character substrings[[b'G', b'\xc3\xb6', b'\xc3\xb6', b'd', b'n', b'i', b'g', b'h', b't'],[b'\xf0\x9f\x98\x8a']]result[1].to_list() # offsets[[0, 1, 3, 5, 6, 7, 8, 9, 10], [0]]