(value)
return group, value
group = display-name ":" [group-list] ";" [CFWS]
group = display-name ":" [group-list] ";" [CFWS]
group = display - name : [ group - list ] ; [ CFWS ]
def get_group(value):
    """ group = display-name ":" [group-list] ";" [CFWS]

    """
    group = Group()
    token, value = get_display_name(value)
    if not value or value[0] != ':':
        raise errors.HeaderParseError("expected ':' at end of group "
            "display name but found '{}'".format(value))
    group.append(token)
    group.append(ValueTerminal(':', 'group-display-name-terminator'))
    value = value[1:]
    if value and value[0] == ';':
        group.append(ValueTerminal(';', 'group-terminator'))
        return group, value[1:]
    token, value = get_group_list(value)
    group.append(token)
    if not value:
        group.defects.append(errors.InvalidHeaderDefect(
            "end of header in group"))
    elif value[0] != ';':
        raise errors.HeaderParseError(
            "expected ';' at end of group but found {}".format(value))
    group.append(ValueTerminal(';', 'group-terminator'))
    value = value[1:]
    if value and value[0] in CFWS_LEADER:
        token, value = get_cfws(value)
        group.append(token)
    return group, value
def get_group ( value ) : group = Group ( ) token , value = get_display_name ( value ) if not value or value [ 0 ] != ':' : raise errors . HeaderParseError ( "expected ':' at end of group " "display name but found '{}'" . format ( value ) ) group . append ( token ) group . append ( ValueTerminal ( ':' , 'group-display-name-terminator' ) ) value = value [ 1 : ] if value and value [ 0 ] == ';' : group . append ( ValueTerminal ( ';' , 'group-terminator' ) ) return group , value [ 1 : ] token , value = get_group_list ( value ) group . append ( token ) if not value : group . defects . append ( errors . InvalidHeaderDefect ( "end of header in group" ) ) elif value [ 0 ] != ';' : raise errors . HeaderParseError ( "expected ';' at end of group but found {}" . format ( value ) ) group . append ( ValueTerminal ( ';' , 'group-terminator' ) ) value = value [ 1 : ] if value and value [ 0 ] in CFWS_LEADER : token , value = get_cfws ( value ) group . append ( token ) return group , value