numpy.char.isalpha

char.isalpha(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature]) = <ufunc 'isalpha'>

Returns true for each element if all characters in the data interpreted as a string are alphabetic and there is at least one character, false otherwise.

For byte strings (i.e. bytes), alphabetic characters are those byte values in the sequence b’abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ’. For Unicode strings, alphabetic characters are those characters defined in the Unicode character database as “Letter”.

Parameters:

xarray_like, with StringDType, bytes_, or str_