`numpy.strings:upper`

Signature

def upper(a)

Return an array with the elements converted to uppercase.

Calls str.upper element-wise.

For 8-bit strings, this method is locale-dependent.

a : array-like, with ``StringDType``, ``bytes_``, or ``str_`` dtype: Input array.

out : ndarray: Output array of StringDType, bytes_ or str_ dtype, depending on input types

import numpy as np
c = np.array(['a1b c', '1bca', 'bca1']); c
np.strings.upper(c)

✓

array(['A1B C', '1BCA', 'BCA1'], dtype='<U5')