def _include_misc(self, name, value):
        """Handle 'include()' for list/tuple attrs without a special handler"""

        if not isinstance(value, sequence):
            raise DistutilsSetupError("%s: setting must be a list (%r)" % (name, value))
        try:
            old = getattr(self, name)
        except AttributeError as e:
            raise DistutilsSetupError("%s: No such distribution setting" % name) from e
        if old is None:
            setattr(self, name, value)
        elif not isinstance(old, sequence):
            raise DistutilsSetupError(
                name + ": this setting cannot be changed via include/exclude"
            )
        else:
            new = [item for item in value if item not in old]
            setattr(self, name, old + new)
Handle 'include()' for list/tuple attrs without a special handler
product/gradle-plugin/src/main/python/setuptools/dist.py