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/NumPy 1.17

numpy.char.chararray.isupper

method

chararray.isupper(self)

Returns true for each element if all cased characters in the string are uppercase and there is at least one character, false otherwise.

See also

char.isupper

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https://docs.scipy.org/doc/numpy-1.17.0/reference/generated/numpy.char.chararray.isupper.html