Class Parameter

Lib/email/_header_value_parser.py:680–705

class Parameter(TokenList):

    token_type = 'parameter'
    sectioned = False
    extended = False
    charset = 'us-ascii'

    @property
    def section_number(self):
        # Because the first token, the attribute (name) eats CFWS, the second
        # token is always the section if there is one.
        return self[1].number if self.sectioned else 0

    @property
    def param_value(self):
        # This is part of the "handle quoted extended parameters" hack.
        for token in self:
            if token.token_type == 'value':
                return token.stripped_value
            if token.token_type == 'quoted-string':
                for token in token:
                    if token.token_type == 'bare-quoted-string':
                        for token in token:
                            if token.token_type == 'value':
                                return token.stripped_value
        return ''


class InvalidParameter(Parameter):