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Return substrings from Tensor
of strings.
tf.compat.v1.substr(
input, pos, len, name=None, unit='BYTE'
)
For each string in the input Tensor
, creates a substring starting at index
pos
with a total length of len
.
If len
defines a substring that would extend beyond the length of the input
string, or if len
is negative, then as many characters as possible are used.
A negative pos
indicates distance within the string backwards from the end.
If pos
specifies an index which is out of range for any of the input strings,
then an InvalidArgumentError
is thrown.
pos
and len
must have the same shape, otherwise a ValueError
is thrown on
Op creation.
Examples
Using scalar pos
and len
:
input = [b'Hello', b'World']
position = 1
length = 3
output = [b'ell', b'orl']
Using pos
and len
with same shape as input
:
input = [[b'ten', b'eleven', b'twelve'],
[b'thirteen', b'fourteen', b'fifteen'],
[b'sixteen', b'seventeen', b'eighteen']]
position = [[1, 2, 3],
[1, 2, 3],
[1, 2, 3]]
length = [[2, 3, 4],
[4, 3, 2],
[5, 5, 5]]
output = [[b'en', b'eve', b'lve'],
[b'hirt', b'urt', b'te'],
[b'ixtee', b'vente', b'hteen']]
Broadcasting pos
and len
onto input
:
input = [[b'ten', b'eleven', b'twelve'],
[b'thirteen', b'fourteen', b'fifteen'],
[b'sixteen', b'seventeen', b'eighteen'],
[b'nineteen', b'twenty', b'twentyone']]
position = [1, 2, 3]
length = [1, 2, 3]
output = [[b'e', b'ev', b'lve'],
[b'h', b'ur', b'tee'],
[b'i', b've', b'hte'],
[b'i', b'en', b'nty']]
Broadcasting input
onto pos
and len
:
input = b'thirteen'
position = [1, 5, 7]
length = [3, 2, 1]
output = [b'hir', b'ee', b'n']
Raises | |
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Returns | |
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A Tensor of type string .
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