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
© 2005–2019 NumPy Developers
Licensed under the 3-clause BSD License.
https://docs.scipy.org/doc/numpy-1.17.0/reference/generated/numpy.char.chararray.isupper.html