(self, boundary)
Set the boundary parameter in Content-Type to 'boundary'.

        This is subtly different than deleting the Content-Type header and
        adding a new one with a new boundary parameter via add_header().  The
        main difference is that using the set_boundary() method preserves the
        order of the Content-Type header in the original message.

        HeaderParseError is raised if the message has no Content-Type header.
Set the boundary parameter in Content-Type to 'boundary'.
Set the boundary parameter in Content - Type to boundary .
def set_boundary(self, boundary):
        """Set the boundary parameter in Content-Type to 'boundary'.

        This is subtly different than deleting the Content-Type header and
        adding a new one with a new boundary parameter via add_header().  The
        main difference is that using the set_boundary() method preserves the
        order of the Content-Type header in the original message.

        HeaderParseError is raised if the message has no Content-Type header.
        """
        missing = object()
        params = self._get_params_preserve(missing, 'content-type')
        if params is missing:
            # There was no Content-Type header, and we don't know what type
            # to set it to, so raise an exception.
            raise errors.HeaderParseError('No Content-Type header found')
        newparams = []
        foundp = False
        for pk, pv in params:
            if pk.lower() == 'boundary':
                newparams.append(('boundary', '"%s"' % boundary))
                foundp = True
            else:
                newparams.append((pk, pv))
        if not foundp:
            # The original Content-Type header had no boundary attribute.
            # Tack one on the end.  BAW: should we raise an exception
            # instead???
            newparams.append(('boundary', '"%s"' % boundary))
        # Replace the existing Content-Type header with the new value
        newheaders = []
        for h, v in self._headers:
            if h.lower() == 'content-type':
                parts = []
                for k, v in newparams:
                    if v == '':
                        parts.append(k)
                    else:
                        parts.append('%s=%s' % (k, v))
                val = SEMISPACE.join(parts)
                newheaders.append(self.policy.header_store_parse(h, val))

            else:
                newheaders.append((h, v))
        self._headers = newheaders
def set_boundary ( self , boundary ) : missing = object ( ) params = self . _get_params_preserve ( missing , 'content-type' ) if params is missing : # There was no Content-Type header, and we don't know what type # to set it to, so raise an exception. raise errors . HeaderParseError ( 'No Content-Type header found' ) newparams = [ ] foundp = False for pk , pv in params : if pk . lower ( ) == 'boundary' : newparams . append ( ( 'boundary' , '"%s"' % boundary ) ) foundp = True else : newparams . append ( ( pk , pv ) ) if not foundp : # The original Content-Type header had no boundary attribute. # Tack one on the end.  BAW: should we raise an exception # instead??? newparams . append ( ( 'boundary' , '"%s"' % boundary ) ) # Replace the existing Content-Type header with the new value newheaders = [ ] for h , v in self . _headers : if h . lower ( ) == 'content-type' : parts = [ ] for k , v in newparams : if v == '' : parts . append ( k ) else : parts . append ( '%s=%s' % ( k , v ) ) val = SEMISPACE . join ( parts ) newheaders . append ( self . policy . header_store_parse ( h , val ) ) else : newheaders . append ( ( h , v ) ) self . _headers = newheaders