def __str__(self):
    if (self.type is NodeType.BLANK):
        return ' '
    if (self.type in CommentType):
        r = self._str
        r = r.replace('\\\\n', '\\n')
        r = r.replace('\\\\r', '\\r')
        return r
    return self._str.strip(' ')
def __str__(self):
    if (self.type is NodeType.BLANK):
        return ' '
    if (self.type in CommentType):
        r = self._str
        r = r.replace('\\\\n', '\\n')
        r = r.replace('\\\\r', '\\r')
        return r
    return self._str.strip(' ')