How to use the fusesoc.section.StringList function in fusesoc

class NoSuchItemError(Error):
    pass


class UnknownSection(Error):
    pass

class StringList(list):
    def __new__(cls, *args, **kwargs):
        if not args:
            return list()
        else:
            return list(args[0].split())

class PathList(StringList):
    def __new__(cls, *args, **kwargs):
        if not args:
            return list()
        else:
            return [os.path.expandvars(p) for p in args[0].split()]

class FileList(PathList):
    def __new__(clk, *args, **kwargs):
        if not args:
            return list()
        else:
            return [File(p) for p in PathList(args[0])]

class EnumList(list):
    def __new__(cls, *args, **kwargs):
        if not args:

class NoSuchItemError(Error):
    pass


class UnknownSection(Error):
    pass

class StringList(list):
    def __new__(cls, *args, **kwargs):
        if not args:
            return list()
        else:
            return list(args[0].split())

class PathList(StringList):
    def __new__(cls, *args, **kwargs):
        if not args:
            return list()
        else:
            return [os.path.expandvars(p) for p in args[0].split()]

class FileList(PathList):
    def __new__(clk, *args, **kwargs):
        if not args:
            return list()
        else:
            return [File(p) for p in PathList(args[0])]

class VlnvList(StringList):
    def __new__(clk, *args, **kwargs):
        if not args:

class PathList(StringList):
    def __new__(cls, *args, **kwargs):
        if not args:
            return list()
        else:
            return [os.path.expandvars(p) for p in args[0].split()]

class FileList(PathList):
    def __new__(clk, *args, **kwargs):
        if not args:
            return list()
        else:
            return [File(p) for p in PathList(args[0])]

class VlnvList(StringList):
    def __new__(clk, *args, **kwargs):
        if not args:
            return list()
        else:
            return [Vlnv(p) for p in StringList(args[0])]

class EnumList(list):
    def __new__(cls, *args, **kwargs):
        if not args:
            return super(EnumList, cls).__new__(cls)
        else:
            values = kwargs['values']
            _args = args[0].split()
            _valid = []
            _invalid = []
            for arg in _args:

def __new__(clk, *args, **kwargs):
        if not args:
            return list()
        else:
            return [Vlnv(p) for p in StringList(args[0])]

for cls in parent.__subclasses__():
        _register_subclasses(cls)
        if cls.TAG is None:
            continue
        SECTION_MAP[cls.TAG] = cls


_register_subclasses(Section)

if __name__ == "__main__":
    typenames = {str           : 'String',
                 FileList      : 'Space-separated list of files',
                 PathList      : 'Space-separated list of paths',
                 SimulatorList : 'Space-separated list',
                 SourceType    : 'String',
                 StringList    : 'Space-separated list',
                 list : 'List'}
    SECTION_TEMPLATE = """
{}
{}

[cols="2,1,5",options="header"]
|==============================
|Name | Type | Description
{}
|==============================

"""

    for k,v in sorted(SECTION_MAP.items()):
        c = v()
        s="\n".join(["|{} | {} | {}".format(k2, typenames[v2['type']], v2['desc']) for k2, v2 in sorted(c._members.items())])

def __init__(self, items=None):
        super(GhdlSection, self).__init__()

        self._add_member('analyze_options', StringList, "Extra GHDL analyzer options")
        self._add_member('run_options', StringList, "Extra GHDL run options")

        if items:
            self.load_dict(items)

for cls in parent.__subclasses__():
        _register_subclasses(cls)
        if cls.TAG is None:
            continue
        SECTION_MAP[cls.TAG] = cls


_register_subclasses(Section)

if __name__ == "__main__":
    typenames = {str           : 'String',
                 FileList      : 'Space-separated list of files',
                 PathList      : 'Space-separated list of paths',
                 SimulatorList : 'Space-separated list',
                 SourceType    : 'String',
                 StringList    : 'Space-separated list',
                 VlnvList      : 'Space-separated list of VLNV identifiers',
                 list : 'List'}
    SECTION_TEMPLATE = """
{}
{}

[cols="2,1,5",options="header"]
|==============================
|Name | Type | Description
{}
|==============================

"""

    for k,v in sorted(SECTION_MAP.items()):
        c = v()

def __init__(self, items=None):
        super(GhdlSection, self).__init__()

        self._add_member('analyze_options', StringList, "Extra GHDL analyzer options")
        self._add_member('run_options', StringList, "Extra GHDL run options")

        if items:
            self.load_dict(items)