Method reset

Lib/email/header.py:572–576

(self, startval=None)

                                for fws, part in self))

    def reset(self, startval=None):
        if startval is None:
            startval = []
        self[:] = startval
        self._initial_size = 0

    def is_onlyws(self):
        return self._initial_size==0 and (not self or str(self).isspace())