def __init__(
        self,
        patch: str,
        read_method: Callable[[str], str],
    ):
        """Given the final patch and access to the container that contains the repository,
        extract relevant lines from the modified file.

        Args:
            patch: The patch as a string.
            read_method: Callable with path to file (relative to repository root) as argument
                that returns the file content as a string.
        """
        self._patch = PatchSet(patch)
        self._patched_files: dict[str, str] = {}
        self._original_files: dict[str, str] = {}
        self._patch_applied = True
        self._read_file = read_method
        self._read_files(original=False)
Given the final patch and access to the container that contains the repository,
        extract relevant lines from the modified file.

        Args:
            patch: The patch as a string.
            read_method: Callable with path to file (relative to repository root) as argument
                that returns the file content as a string.
        
sweagent/utils/patch_formatter.py