ufunc
numpy.ctypeslib
numpy.dual
numpy.emath
numpy.fft
numpy.linalg
numpy.matlib
numpy.random
numpy.testing
numpy.typing
numpy.distutils
method
For each element, return the lowest index in the string where substring sub is found.
See also
char.find
previous
numpy.char.chararray.fill
next
numpy.char.chararray.flatten