'Return an iterator that yields the string-formatted values of this
column.
Returns
str_vals : iterator
Column values formatted as strings'

def iter_str_vals(self):

    _pformat_col_iter = self._formatter._pformat_col_iter
    for str_val in _pformat_col_iter(self, (-1), show_name=False, show_unit=False, show_dtype=False, outs={}):
        (yield str_val)
