def split(a, sep=None, maxsplit=None):
<EOL>return _vec_string(<EOL>a, object_, '<STR_LIT>', [sep] + _clean_args(maxsplit))<EOL>
For each element in `a`, return a list of the words in the
string, using `sep` as the delimiter string.

Calls `str.rsplit` element-wise.

Parameters
----------
a : array_like of str or unicode

sep : str or unicode, optional
   If `sep` is not specified or `None`, any whitespace string is a
   separator.

maxsplit : int, optional
    If `maxsplit` is given, at most `maxsplit` splits are done.

Returns
-------
out : ndarray
    Array of list objects

See also
--------
str.split, rsplit