`numpy.strings:swapcase`

Signature

def swapcase ( a )

Return element-wise a copy of the string with uppercase characters converted to lowercase and vice versa.

Calls str.swapcase 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

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c=np.array(['a1B c','1b Ca','b Ca1','cA1b'],'S5'); c
np.strings.swapcase(c)

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