numpy.strings.swapcase — NumPy v2.6.dev0 Manual

strings.swapcase(a)

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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.

Parameters:aarray-like, with StringDType, bytes_, or str_ dtypeInput array.

Returns:outndarrayOutput array of StringDType, bytes_ or str_ dtype, depending on input types

Examples

>>> importnumpyasnp>>> c=np.array(['a1B c','1b Ca','b Ca1','cA1b'],'S5');carray(['a1B c', '1b Ca', 'b Ca1', 'cA1b'], dtype='|S5')>>> np.strings.swapcase(c)array(['A1b C', '1B cA', 'B cA1', 'Ca1B'], dtype='|S5')