How to use the pybind11.tools.clang.cindex.LibclangError function in pybind11

def register_function(lib, item, ignore_errors):
    # A function may not exist, if these bindings are used with an older or
    # incompatible version of libclang.so.
    try:
        func = getattr(lib, item[0])
    except AttributeError as e:
        msg = str(e) + ". Please ensure that your python bindings are "\
                       "compatible with your libclang.so version."
        if ignore_errors:
            return
        raise LibclangError(msg)

    if len(item) >= 2:
        func.argtypes = item[1]

    if len(item) >= 3:
        func.restype = item[2]

    if len(item) == 4:
        func.errcheck = item[3]

def get_cindex_library(self):
        try:
            library = cdll.LoadLibrary(self.get_filename())
        except OSError as e:
            msg = str(e) + ". To provide a path to libclang use " \
                           "Config.set_library_path() or " \
                           "Config.set_library_file()."
            raise LibclangError(msg)

        return library