On this page
numpy.core.defchararray.chararray.lower
method
chararray.lower()[source]-
Return an array with the elements of
selfconverted to lowercase.See also
char.lower
© 2005–2019 NumPy Developers
Licensed under the 3-clause BSD License.
https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.core.defchararray.chararray.lower.html