def normalize(self, form):
import unicodedata<EOL>f = lambda x: unicodedata.normalize(form, x)<EOL>result = _na_map(f, self._parent)<EOL>return self._wrap_result(result)<EOL>
Return the Unicode normal form for the strings in the Series/Index.
For more information on the forms, see the
:func:`unicodedata.normalize`.

Parameters
----------
form : {'NFC', 'NFKC', 'NFD', 'NFKD'}
    Unicode form

Returns
-------
normalized : Series/Index of objects