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bundles / numpy latest / numpy / strings / str_len

ufunc

numpy.strings:str_len

source: build-install/usr/lib/python3.14/site-packages/numpy/__init__.py

Summary

Returns the length of each element. For byte strings, this is the number of bytes, while, for Unicode strings, it is the number of Unicode code points.

Parameters

x : array_like, with ``StringDType``, ``bytes_``, or ``str_`` dtype
out : ndarray, None, or tuple of ndarray and None, optional

A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

where : array_like, optional

This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the default out=None, locations within it where the condition is False will remain uninitialized.

**kwargs

For other keyword-only arguments, see the ufunc docs <ufuncs.kwargs>.

Returns

y : ndarray

Output array of ints This is a scalar if x is a scalar.

Examples

import numpy as np
a = np.array(['Grace Hopper Conference', 'Open Source Day'])
np.strings.str_len(a)
a = np.array(['Р', 'о'])
np.strings.str_len(a)
a = np.array([['hello', 'world'], ['Р', 'о']])
✓
np.strings.str_len(a)
✗

See also

len

Aliases

  • numpy.char.str_len