code: def _excel_cell(cls, cell, quote_everything=False, quote_numbers=True,
                      _is_header=False):
          
          if cell is None:
              return u''
          if cell is True:
              return u'TRUE'
          if cell is False:
              return u'FALSE'
  
          ret = cell if isinstance(cell, BASESTRING) else UNICODE(cell)
          if isinstance(cell, (int, float)) and not quote_everything:
              return ret
  
          ret = ret.replace(u'\u2019', u"'").replace(u'\u2018', u"'")
          ret = ret.replace(u'\u201c', u'"').replace(u'\u201d', u'"')
          ret = ret.replace(u'\r', u'\\r')
          ret = ret.replace(u'\n', u'\r')
          ret = ret.replace(u'"', u'""')
  
          if ((ret.replace(u'.', u'').isdigit() and quote_numbers) or
                  ret.startswith(u' ') or ret.endswith(u' ')):
              return u'"%s"' % ret
  
          for special_char in [u'\r', u'\t', u'"', u',', u"'"]:
              if special_char in ret:
                  return u'"%s"' % ret
  
          return ret
docs: This will return a text that excel interprets correctly when
          importing csv
          :param cell:             obj to store in the cell
          :param quote_everything: bool to quote even if not necessary
          :param quote_numbers:    bool if True will quote numbers that are
                                   strings
          :param _is_header:       not used
          :return: str