Method fold

Lib/email/policy.py:172–191

+ Header folding is controlled by the refold_source policy setting. A value is considered to be a 'source value' if and only if it does not have a 'name' attribute (having a 'name' attribute means it is a header object of some sort). If a source value needs to be re

(self, name, value)

        return self.header_factory(name, value)

    def fold(self, name, value):
        """+
        Header folding is controlled by the refold_source policy setting.  A
        value is considered to be a 'source value' if and only if it does not
        have a 'name' attribute (having a 'name' attribute means it is a header
        object of some sort).  If a source value needs to be refolded according
        to the policy, it is converted into a custom header object by passing
        the name and the value with any linesep characters removed to the
        header_factory method.  Folding of a custom header object is done by
        calling its fold method with the current policy.

        Source values are split into lines using splitlines.  If the value is
        not to be refolded, the lines are rejoined using the linesep from the
        policy and returned.  The exception is lines containing non-ascii
        binary data.  In that case the value is refolded regardless of the
        refold_source setting, which causes the binary data to be CTE encoded
        using the unknown-8bit charset.

        """
        return self._fold(name, value, refold_binary=True)

    def fold_binary(self, name, value):
        """+