def _to_lower_alpha_only(s):
    """Return a lowercased string with non alphabetic chars removed.

    White spaces are not to be removed."""
    s = re.sub(r'\n', ' ',  s.lower())
    return re.sub(r'[^a-z\s]', '', s)
def _to_lower_alpha_only(s):
    """Return a lowercased string with non alphabetic chars removed.

    White spaces are not to be removed."""
    s = re.sub(r'\n', ' ',  s.lower())
    return re.sub(r'[^a-z\s]', '', s)
def _to_lower_alpha_only ( s ) : s = re . sub ( r'\n' , ' ' , s . lower ( ) ) return re . sub ( r'[^a-z\s]' , '' , s )
Return a lowercased string with non alphabetic chars removed.

    White spaces are not to be removed.
Return a lowercased string with non alphabetic chars removed .