def combine(
        self,
        data_paths: Iterable[str] | None = None,
        strict: bool = False,
        keep: bool = False,
    ) -> None:
        """Combine together a number of similarly-named coverage data files.

        All coverage data files whose name starts with `data_file` (from the
        coverage() constructor) will be read, and combined together into the
        current measurements.

        `data_paths` is a list of files or directories from which data should
        be combined. If no list is passed, then the data files from the
        directory indicated by the current data file (probably the current
        directory) will be combined.

        If `strict` is true, then it is an error to attempt to combine when
        there are no data files to combine.

        If `keep` is true, then original input data files won't be deleted.

        .. versionadded:: 4.0
            The `data_paths` parameter.

        .. versionadded:: 4.3
            The `strict` parameter.

        .. versionadded: 5.5
            The `keep` parameter.
        """
        self._init()
        self._init_data(suffix=None)
        self._post_init()
        self.get_data()

        assert self._data is not None
        combine_parallel_data(
            self._data,
            aliases=self._make_aliases(),
            data_paths=data_paths,
            strict=strict,
            keep=keep,
            message=self._message,
        )
Combine together a number of similarly-named coverage data files.

        All coverage data files whose name starts with `data_file` (from the
        coverage() constructor) will be read, and combined together into the
        current measurements.

        `data_paths` is a list of files or directories from which data should
        be combined. If no list is passed, then the data files from the
        directory indicated by the current data file (probably the current
        directory) will be combined.

        If `strict` is true, then it is an error to attempt to combine when
        there are no data files to combine.

        If `keep` is true, then original input data files won't be deleted.

        .. versionadded:: 4.0
            The `data_paths` parameter.

        .. versionadded:: 4.3
            The `strict` parameter.

        .. versionadded: 5.5
            The `keep` parameter.
        
coverage/control.py